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/CakePHP 2.8

Class Mysql

MySQL DBO driver object

Provides connection and SQL generation for MySQL RDMS

Object

DataSource

DboSource

Mysql

Package: Cake\Model\Datasource\Database
Copyright: Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
License: MIT License
Location: Cake/Model/Datasource/Database/Mysql.php

Properties summary

$_baseConfig protected

array
Base configuration settings for MySQL driver
$_charsets protected

array
Mapping of collation names to character set names
$_connection protected

PDO
Reference to the PDO object connection
$_useAlias protected

boolean
use alias for update and delete. Set to true if version >= 4.1
$columns public

array
MySQL column definition
$description public

string
Datasource description
$endQuote public

string
End quote
$fieldParameters public

array
List of engine specific additional field parameters used on table creating
$startQuote public

string
Start quote
$tableParameters public

array
List of table engine specific parameters used on table creating

Inherited Properties

_methodCacheChange, _queriesCnt, _queriesLog, _queriesLogMax, _queriesTime, _queryCache, _queryDefaults, _result, _sqlBoolOps, _sqlOps, _transactionNesting, affected, alias, cacheMethods, configKeyName, fullDebug, index, methodCache, numRows, took, useNestedTransactions, virtualFieldSeparator _descriptions, _sources, _transactionStarted, cacheSources, config, connected

Method Summary

_alterIndexes() protected
Generate MySQL index alteration statements for a table.
_alterTableParameters() protected
Generate MySQL table parameter alteration statements for a table.
_buildIndexSubPart() protected
Format length for text indexes
_deleteNeedsComplexConditions() protected
Checks whether complex conditions are needed for a delete with the given conditions.
_dropTable() protected
Generate a "drop table" statement for the given table
_unsigned() protected
Check if column type is unsigned
alterSchema() public
Generate a MySQL Alter Table syntax for the given Schema comparison
buildIndex() public
Format indexes for create table
column() public
Converts database-layer column types to basic types
connect() public
Connects to the database using options in the given configuration array.
delete() public
Generates and executes an SQL DELETE statement for given id/conditions on given model.
describe() public
Returns an array of the fields in given table name.
enabled() public
Check whether the MySQL extension is installed/loaded
fetchResult() public
Fetches the next row from the current result set
getCharsetName() public
Query charset by collation
getEncoding() public
Gets the database encoding
getSchemaName() public
Gets the schema name
index() public
Returns an array of the indexes in given datasource name.
insertMulti() public

Inserts multiple values into a table. Uses a single query in order to insert multiple rows.
listDetailedSources() public
Returns a detailed array of sources (tables) in the database.
listSources() public
Returns an array of sources (tables) in the database.
nestedTransactionSupported() public
Check if the server support nested transactions
resultSet() public
Builds a map of the columns contained in a result
setEncoding() public
Sets the database encoding
update() public
Generates and executes an SQL UPDATE statement for given model, fields, and values.
value() public
Returns a quoted and escaped string of $data for use in an SQL statement.

Method Detail

_alterIndexes()source protected

_alterIndexes( string $table , array $indexes )

Generate MySQL index alteration statements for a table.

Parameters

string $table: Table to alter indexes for
array $indexes: Indexes to add and drop

Returns

array
Index alteration statements

_alterTableParameters()source protected

_alterTableParameters( string $table , array $parameters )

Generate MySQL table parameter alteration statements for a table.

Parameters

string $table: Table to alter parameters for.
array $parameters: Parameters to add & drop.

Returns

array
Array of table property alteration statements.

_buildIndexSubPart()source protected

_buildIndexSubPart( array $lengths , string $column )

Format length for text indexes

Parameters

array $lengths: An array of lengths for a single index
string $column: The column for which to generate the index length

Returns

string
Formatted length part of an index field

_deleteNeedsComplexConditions()source protected

_deleteNeedsComplexConditions( Model $model , mixed $conditions )

Checks whether complex conditions are needed for a delete with the given conditions.

Parameters

Model $model: The model to delete from.
mixed $conditions: The conditions to use.

Returns

boolean
Whether or not complex conditions are needed

_dropTable()source protected

_dropTable( type $table )

Generate a "drop table" statement for the given table

Parameters

type $table: Name of the table to drop

Returns

string
Drop table SQL statement

Overrides

DboSource::_dropTable()

_unsigned()source protected

_unsigned( string $real )

Check if column type is unsigned

Parameters

string $real: Real database-layer column type (i.e. "varchar(255)")

Returns

boolean
True if column is unsigned, false otherwise

alterSchema()source public

alterSchema( array $compare , string $table null )

Generate a MySQL Alter Table syntax for the given Schema comparison

Parameters

array $compare: Result of a CakeSchema::compare()
string $table optional null: The table name.

Returns

array
Array of alter statements to make.

Overrides

DboSource::alterSchema()

buildIndex()source public

buildIndex( array $indexes , string $table null )

Format indexes for create table

Parameters

array $indexes: An array of indexes to generate SQL from
string $table optional null: Optional table name, not used

Returns

array
An array of SQL statements for indexes

See

DboSource::buildIndex()

Overrides

DboSource::buildIndex()

column()source public

column( string $real )

Converts database-layer column types to basic types

Parameters

string $real: Real database-layer column type (i.e. "varchar(255)")

Returns

string
Abstract column type (i.e. "string")

Overrides

DataSource::column()

connect()source public

connect( )

Connects to the database using options in the given configuration array.

MySQL supports a few additional options that other drivers do not:

unix_socket Set to the path of the MySQL sock file. Can be used in place of host + port.
ssl_key SSL key file for connecting via SSL. Must be combined with ssl_cert.
ssl_cert The SSL certificate to use when connecting via SSL. Must be combined with ssl_key.
ssl_ca The certificate authority for SSL connections.

Returns

boolean
True if the database could be connected, else false

Throws

MissingConnectionException

delete()source public

delete( Model $model , mixed $conditions null )

Generates and executes an SQL DELETE statement for given id/conditions on given model.

Parameters

Model $model: The model to delete from.
mixed $conditions optional null: The conditions to use.

Returns

boolean
Success

Overrides

DboSource::delete()

describe()source public

describe( Model|string $model )

Returns an array of the fields in given table name.

Parameters

Model|string $model: Name of database table to inspect or model instance

Returns

array
Fields in table. Keys are name and type

Throws

CakeException

Overrides

DataSource::describe()

enabled()source public

enabled( )

Check whether the MySQL extension is installed/loaded

Returns

boolean

Overrides

DataSource::enabled()

fetchResult()source public

fetchResult( )

Fetches the next row from the current result set

Returns

mixed
array with results fetched and mapped to column names or false if there is no results left to fetch

Overrides

DboSource::fetchResult()

getCharsetName()source public

getCharsetName( string $name )

Query charset by collation

Parameters

string $name: Collation name

Returns

string
Character set name

getEncoding()source public

getEncoding( )

Gets the database encoding

Returns

string
The database encoding

getSchemaName()source public

getSchemaName( )

Gets the schema name

Returns

string
The schema name

Overrides

DataSource::getSchemaName()

index()source public

index( string $model )

Returns an array of the indexes in given datasource name.

Parameters

string $model: Name of model to inspect

Returns

array
Fields in table. Keys are column and unique

Overrides

DboSource::index()

insertMulti()source public

insertMulti( string $table , array $fields , array $values )

Inserts multiple values into a table. Uses a single query in order to insert multiple rows.

Parameters

string $table: The table being inserted into.
array $fields: The array of field/column names being inserted.
array $values: The array of values to insert. The values should be an array of rows. Each row should have values keyed by the column name. Each row must have the values in the same order as $fields.

Returns

boolean

Overrides

DboSource::insertMulti()

listDetailedSources()source public

listDetailedSources( string $name null )

Returns a detailed array of sources (tables) in the database.

Parameters

string $name optional null: Table name to get parameters

Returns

array
Array of table names in the database

listSources()source public

listSources( mixed $data null )

Returns an array of sources (tables) in the database.

Parameters

mixed $data optional null: List of tables.

Returns

array
Array of table names in the database

Overrides

DataSource::listSources()

nestedTransactionSupported()source public

nestedTransactionSupported( )

Check if the server support nested transactions

Returns

boolean

Overrides

DboSource::nestedTransactionSupported()

resultSet()source public

resultSet( PDOStatement $results )

Builds a map of the columns contained in a result

Parameters

PDOStatement $results: The results to format.

setEncoding()source public

setEncoding( string $enc )

Sets the database encoding

Parameters

string $enc: Database encoding

Returns

boolean

update()source public

update( Model $model , array $fields array() , array $values null , mixed $conditions null )

Generates and executes an SQL UPDATE statement for given model, fields, and values.

Parameters

Model $model: The model to update.
array $fields optional array(): The fields to update.
array $values optional null: The values to set.
mixed $conditions optional null: The conditions to use.

Returns

array

Overrides

DboSource::update()

value()source public

value( string $data , string $column null , boolean $null true )

Returns a quoted and escaped string of $data for use in an SQL statement.

Parameters

string $data: String to be prepared for use in an SQL statement
string $column optional null: The column datatype into which this data will be inserted.
boolean $null optional true: Column allows NULL values

Returns

string
Quoted and escaped data

Overrides

DboSource::value()

Methods inherited from DboSource

__construct()source public

__construct( array $config null , boolean $autoConnect true )

Constructor

Parameters

array $config optional null: Array of configuration information for the Datasource.
boolean $autoConnect optional true: Whether or not the datasource should automatically connect.

Throws

MissingConnectionException
when a connection cannot be made.

Overrides

DataSource::__construct()

__destruct()source public

__destruct( )

Used for storing in cache the results of the in-memory methodCache

Overrides

DataSource::__destruct()

_beginNested()source protected

_beginNested( )

Begin a nested transaction

Returns

boolean

_buildFieldParameters()source protected

_buildFieldParameters( string $columnString , array $columnData , string $position )

Build the field parameters, in a position

Parameters

string $columnString: The partially built column string
array $columnData: The array of column data.
string $position: The position type to use. 'beforeDefault' or 'afterDefault' are common

Returns

string
a built column with the field parameters added.

_commitNested()source protected

_commitNested( )

Commit a nested transaction

Returns

boolean

_constructVirtualFields()source protected

_constructVirtualFields( Model $Model , string $alias , array $fields )

Converts model virtual fields into sql expressions to be fetched later

Parameters

Model $Model: The model to get virtual fields for.
string $alias: Alias table name
array $fields: virtual fields to be used on query

Returns

array

_execute()source protected

_execute( string $sql , array $params array() , array $prepareOptions array() )

Executes given SQL statement.

Parameters

string $sql: SQL statement
array $params optional array(): list of params to be bound to query
array $prepareOptions optional array(): Options to be used in the prepare statement

Returns

mixed

PDOStatement if query executes with no problem, true as the result of a successful, false on error query returning no rows, such as a CREATE statement, false otherwise

Throws

PDOException

_fetchHasAndBelongsToMany()source protected

_fetchHasAndBelongsToMany( Model $Model , string $query , array $ids , string $association )

Fetch 'hasAndBelongsToMany' associations.

Parameters

Model $Model: Primary model object.
string $query: Association query.
array $ids: Array of IDs of associated records.
string $association: Association name.

Returns

array
Association results.

_fetchHasMany()source protected

_fetchHasMany( Model $Model , string $query , array $ids )

Fetch 'hasMany' associations.

Parameters

Model $Model: Primary model object.
string $query: Association query template.
array $ids: Array of IDs of associated records.

Returns

array
Association results.

_filterResults()source protected

_filterResults( array $resultSet , Model $Model , array $filtered array() )

Passes association results through afterFind filters of the corresponding model.

The primary model is always excluded, because the filtering is later done by Model::_filterResults().

Parameters

array $resultSet: $resultSet Reference of resultset to be filtered.
Model $Model: Instance of model to operate against.
array $filtered optional array(): List of classes already filtered, to be skipped.

Returns

array
Array of results that have been filtered through $Model->afterFind.

_filterResultsInclusive()source protected

_filterResultsInclusive( array $resultSet , Model $Model , array $toBeFiltered array() )

Passes association results through afterFind filters of the corresponding model.

Similar to DboSource::_filterResults(), but this filters only specified models. The primary model can not be specified, because this call DboSource::_filterResults() internally.

Parameters

array $resultSet: $resultSet Reference of resultset to be filtered.
Model $Model: Instance of model to operate against.
array $toBeFiltered optional array(): List of classes to be filtered.

Returns

array
Array of results that have been filtered through $Model->afterFind.

_getJoins()source protected

_getJoins( Model $Model )

Returns an array of SQL JOIN conditions from a model's associations.

Parameters

Model $Model: The model to get joins for.2

Returns

array

_matchRecords()source protected

_matchRecords( Model $Model , mixed $conditions null )

Gets a list of record IDs for the given conditions. Used for multi-record updates and deletes in databases that do not support aliases in UPDATE/DELETE queries.

Parameters

Model $Model: The model to find matching records for.
mixed $conditions optional null: The conditions to match against.

Returns

array
List of record IDs

_mergeAssociation()source protected

_mergeAssociation( array $data , array $merge , string $association , string $type , boolean $selfJoin false )

Merge association of merge into data

Parameters

array $data: $data The data to merge.
array $merge: $merge The data to merge.
string $association: The association name to merge.
string $type: The type of association
boolean $selfJoin optional false: Whether or not this is a self join.

_mergeConditions()source protected

_mergeConditions( mixed $query , mixed $assoc )

Merges a mixed set of string/array conditions.

Parameters

mixed $query: The query to merge conditions for.
mixed $assoc: The association names.

Returns

array

_mergeHasMany()source protected

_mergeHasMany( array $resultSet , array $assocResultSet , string $association , Model $Model )

Merge the results of 'hasMany' associations.

Note: this function also deals with the formatting of the data.

Parameters

array $resultSet: $resultSet Data to merge into.
array $assocResultSet: Data to merge.
string $association: Name of Model being merged.
Model $Model: Model being merged onto.

_parseKey()source protected

_parseKey( string $key , mixed $value , Model $Model null )

Extracts a Model.field identifier and an SQL condition operator from a string, formats and inserts values, and composes them into an SQL snippet.

Parameters

string $key: An SQL key snippet containing a field and optional SQL operator
mixed $value: The value(s) to be inserted in the string
Model $Model optional null: Model object initiating the query

Returns

string

_prepareUpdateFields()source protected

_prepareUpdateFields( Model $Model , array $fields , boolean $quoteValues true , boolean $alias false )

Quotes and prepares fields and values for an SQL UPDATE statement

Parameters

Model $Model: The model to prepare fields for.
array $fields: The fields to update.
boolean $quoteValues optional true: If values should be quoted, or treated as SQL snippets
boolean $alias optional false: Include the model alias in the field name

Returns

array
Fields and values, quoted and prepared

_quoteFields()source protected

_quoteFields( string $conditions )

Quotes Model.fields

Parameters

string $conditions: The conditions to quote.

Returns

string
or false if no match

_quoteMatchedField()source protected

_quoteMatchedField( string $match )

Auxiliary function to quote matches Model.fields from a preg_replace_callback call

Parameters

string $match: matched string

Returns

string
quoted string

_rollbackNested()source protected

_rollbackNested( )

Rollback a nested transaction

Returns

boolean

_scrubQueryData()source protected

_scrubQueryData( array $data )

Private helper method to remove query metadata in given data array.

Parameters

array $data: The data to scrub.

Returns

array

_writeQueryCache()source protected

_writeQueryCache( string $sql , mixed $data , array $params array() )

Writes a new key for the in memory sql query cache

Parameters

string $sql: SQL query
mixed $data: result of $sql query
array $params optional array(): query params bound as values

begin()source public

begin( )

Begin a transaction

Returns

boolean

True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).

Overrides

DataSource::begin()

boolean()source public

boolean( mixed $data , boolean $quote false )

Translates between PHP boolean values and Database (faked) boolean values

Parameters

mixed $data: Value to be translated
boolean $quote optional false: Whether or not the field should be cast to a string.

Returns

string|boolean
Converted boolean value

buildAssociationQuery()source public

buildAssociationQuery( Model $Model , array $queryData )

Builds an SQL statement.

This is merely a convenient wrapper to DboSource::buildStatement().

Parameters

Model $Model: The model to build an association query for.
array $queryData: An array of queryData information containing keys similar to Model::find().

Returns

string
String containing an SQL statement.

See

DboSource::buildStatement()

buildColumn()source public

buildColumn( array $column )

Generate a database-native column schema string

Parameters

array $column: An array structured like the following: array('name' => 'value', 'type' => 'value'[, options]), where options can be 'default', 'length', or 'key'.

Returns

string

buildJoinStatement()source public

buildJoinStatement( array $join )

Builds and generates a JOIN condition from an array. Handles final clean-up before conversion.

Parameters

array $join: An array defining a JOIN condition in a query.

Returns

string
An SQL JOIN condition to be used in a query.

See

DboSource::renderJoinStatement()
DboSource::buildStatement()

buildStatement()source public

buildStatement( array $query , Model $Model )

Builds and generates an SQL statement from an array. Handles final clean-up before conversion.

Parameters

array $query: An array defining an SQL query.
Model $Model: The model object which initiated the query.

Returns

string
An executable SQL statement.

See

DboSource::renderStatement()

buildTableParameters()source public

buildTableParameters( array $parameters , string $table null )

Format parameters for create table

Parameters

array $parameters: The parameters to create SQL for.
string $table optional null: The table name.

Returns

array

cacheMethod()source public

cacheMethod( string $method , string $key , mixed $value null )

Cache a value into the methodCaches. Will respect the value of DboSource::$cacheMethods. Will retrieve a value from the cache if $value is null.

If caching is disabled and a write is attempted, the $value will be returned. A read will either return the value or null.

Parameters

string $method: Name of the method being cached.
string $key: The key name for the cache operation.
mixed $value optional null: The value to cache into memory.

Returns

mixed
Either null on failure, or the value if its set.

calculate()source public

calculate( Model $Model , string $func , array $params array() )

Returns an SQL calculation, i.e. COUNT() or MAX()

Parameters

Model $Model: The model to get a calculated field for.
string $func: Lowercase name of SQL function, i.e. 'count' or 'max'
array $params optional array(): Function parameters (any values must be quoted manually)

Returns

string
An SQL calculation function

close()source public

close( )

Disconnects database, kills the connection and says the connection is closed.

Overrides

DataSource::close()

commit()source public

commit( )

Commit a transaction

Returns

boolean

True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).

Overrides

DataSource::commit()

conditionKeysToString()source public

conditionKeysToString( array $conditions , boolean $quoteValues true , Model $Model null )

Creates a WHERE clause by parsing given conditions array. Used by DboSource::conditions().

Parameters

array $conditions: Array or string of conditions
boolean $quoteValues optional true: If true, values should be quoted
Model $Model optional null: A reference to the Model instance making the query

Returns

string
SQL fragment

conditions()source public

conditions( mixed $conditions , boolean $quoteValues true , boolean $where true , Model $Model null )

Creates a WHERE clause by parsing given conditions data. If an array or string conditions are provided those conditions will be parsed and quoted. If a boolean is given it will be integer cast as condition. Null will return 1 = 1.

Results of this method are stored in a memory cache. This improves performance, but because the method uses a hashing algorithm it can have collisions. Setting DboSource::$cacheMethods to false will disable the memory cache.

Parameters

mixed $conditions: Array or string of conditions, or any value.
boolean $quoteValues optional true: If true, values should be quoted
boolean $where optional true: If true, "WHERE " will be prepended to the return value
Model $Model optional null: A reference to the Model instance making the query

Returns

string
SQL fragment

create()source public

create( Model $Model , array $fields null , array $values null )

The "C" in CRUD

Creates new records in the database.

Parameters

Model $Model: Model object that the record is for.
array $fields optional null: An array of field names to insert. If null, $Model->data will be used to generate field names.
array $values optional null: An array of values with keys matching the fields. If null, $Model->data will be used to generate values.

Returns

boolean
Success

Overrides

DataSource::create()

createSchema()source public

createSchema( CakeSchema $schema , string $tableName null )

Generate a database-native schema for the given Schema object

Parameters

CakeSchema $schema: An instance of a subclass of CakeSchema
string $tableName optional null: Optional. If specified only the table name given will be generated. Otherwise, all tables defined in the schema are generated.

Returns

string

defaultConditions()source public

defaultConditions( Model $Model , string|array|boolean $conditions , boolean $useAlias true )

Creates a default set of conditions from the model if $conditions is null/empty. If conditions are supplied then they will be returned. If a model doesn't exist and no conditions were provided either null or false will be returned based on what was input.

Parameters

Model $Model: The model to get conditions for.
string|array|boolean $conditions: Array of conditions, conditions string, null or false. If an array of conditions, or string conditions those conditions will be returned. With other values the model's existence will be checked. If the model doesn't exist a null or false will be returned depending on the input value.
boolean $useAlias optional true: Use model aliases rather than table names when generating conditions

Returns

mixed
Either null, false, $conditions or an array of default conditions to use.

See

DboSource::update()
DboSource::conditions()

disconnect()source public

disconnect( )

Disconnects from database.

Returns

boolean
Always true

dropSchema()source public

dropSchema( CakeSchema $schema , string $table null )

Generate a "drop table" statement for the given Schema object

Parameters

CakeSchema $schema: An instance of a subclass of CakeSchema
string $table optional null: Optional. If specified only the table name given will be generated. Otherwise, all tables defined in the schema are generated.

Returns

string

execute()source public

execute( string $sql , array $options array() , array $params array() )

Queries the database with given SQL statement, and obtains some metadata about the result (rows affected, timing, any errors, number of rows in resultset). The query is also logged. If Configure::read('debug') is set, the log is shown all the time, else it is only shown on errors.

Options

log - Whether or not the query should be logged to the memory log.

Parameters

string $sql: SQL statement
array $options optional array(): The options for executing the query.
array $params optional array(): values to be bound to the query.

Returns

mixed
Resource or object representing the result set, or false on failure

expression()source public

expression( string $expression )

Returns an object to represent a database expression in a query. Expression objects are not sanitized or escaped.

Parameters

string $expression: An arbitrary SQL expression to be inserted into a query.

Returns

stdClass
An object representing a database expression to be used in a query

fetchAll()source public

fetchAll( string $sql , array|boolean $params array() , array $options array() )

Returns an array of all result rows for a given SQL query.

Returns false if no rows matched.

Options

cache - Returns the cached version of the query, if exists and stores the result in cache. This is a non-persistent cache, and only lasts for a single request. This option defaults to true. If you are directly calling this method, you can disable caching by setting $options to false

Parameters

string $sql: SQL statement
array|boolean $params optional array(): Either parameters to be bound as values for the SQL statement, or a boolean to control query caching.
array $options optional array(): additional options for the query.

Returns

boolean|array
Array of resultset rows, or false if no rows matched

fetchAssociated()source public

fetchAssociated( Model $Model , string $query , array $ids )

Fetch 'hasMany' associations.

This is just a proxy to maintain BC.

Parameters

Model $Model: Primary model object.
string $query: Association query template.
array $ids: Array of IDs of associated records.

Returns

array
Association results.

See

DboSource::_fetchHasMany()

fetchRow()source public

fetchRow( string $sql null )

Returns a row from current resultset as an array

Parameters

string $sql optional null: Some SQL to be executed.

Returns

array
The fetched row as an array

fetchVirtualField()source public

fetchVirtualField( array $result )

Modifies $result array to place virtual fields in model entry where they belongs to

Parameters

array $result: $result Reference to the fetched row

field()source public

field( string $name , string $sql )

Returns a single field of the first of query results for a given SQL query, or false if empty.

Parameters

string $name: The name of the field to get.
string $sql: The SQL query.

Returns

mixed
Value of field read, or false if not found.

fields()source public

fields( Model $Model , string $alias null , mixed $fields array() , boolean $quote true )

Generates the fields list of an SQL query.

Parameters

Model $Model: The model to get fields for.
string $alias optional null: Alias table name
mixed $fields optional array(): The provided list of fields.
boolean $quote optional true: If false, returns fields array unquoted

Returns

array

flushMethodCache()source public

flushMethodCache( )

Empties the method caches. These caches are used by DboSource::name() and DboSource::conditions()

fullTableName()source public

fullTableName( Model|string $model , boolean $quote true , boolean $schema true )

Gets full table name including prefix

Parameters

Model|string $model: Either a Model object or a string table name.
boolean $quote optional true: Whether you want the table name quoted.
boolean $schema optional true: Whether you want the schema name included.

Returns

string
Full quoted table name

generateAssociationQuery()source public

generateAssociationQuery( Model $Model , Model|null $LinkModel , string $type , string $association , array $assocData , array $queryData , boolean $external )

Generates a query or part of a query from a single model or two associated models.

Builds a string containing an SQL statement template.

Parameters

Model $Model: Primary Model object.
Model|null $LinkModel: Linked model object.
string $type: Association type, one of the model association types ie. hasMany.
string $association: Association name.
array $assocData: Association data.
array $queryData: $queryData An array of queryData information containing keys similar to Model::find().
boolean $external: Whether or not the association query is on an external datasource.

Returns

mixed

String representing a query. True, when $external is false and association $type is 'hasOne' or 'belongsTo'.

getConnection()source public

getConnection( )

Get the underlying connection object.

Returns

PDO

getConstraint()source public

getConstraint( string $type , Model $Model , Model $LinkModel , string $association , array $assocData , string $association2 null )

Returns a conditions array for the constraint between two models.

Parameters

string $type: Association type.
Model $Model: Primary Model object.
Model $LinkModel: Linked model object.
string $association: Association name.
array $assocData: Association data.
string $association2 optional null: HABTM association name.

Returns

array
Conditions array defining the constraint between $Model and $LinkModel.

getLog()source public

getLog( boolean $sorted false , boolean $clear true )

Get the query log as an array.

Parameters

boolean $sorted optional false: Get the queries sorted by time taken, defaults to false.
boolean $clear optional true: If True the existing log will cleared.

Returns

array
Array of queries run as an array

getQueryCache()source public

getQueryCache( string $sql , array $params array() )

Returns the result for a sql query if it is already cached

Parameters

string $sql: SQL query
array $params optional array(): query params bound as values

Returns

mixed
results for query if it is cached, false otherwise

getVersion()source public

getVersion( )

Gets the version string of the database server

Returns

string
The database version

group()source public

group( string|array $fields , Model $Model null )

Create a GROUP BY SQL clause.

Parameters

string|array $fields: Group By fields
Model $Model optional null: The model to get group by fields for.

Returns

string
Group By clause or null.

hasAny()source public

hasAny( Model $Model , string $sql )

Checks if the specified table contains any record matching specified SQL

Parameters

Model $Model: Model to search
string $sql: SQL WHERE clause (condition only, not the "WHERE" part)

Returns

boolean
True if the table has a matching record, else false

hasResult()source public

hasResult( )

Checks if the result is valid

Returns

boolean
True if the result is valid else false

identifier()source public

identifier( string $identifier )

Returns an object to represent a database identifier in a query. Expression objects are not sanitized or escaped.

Parameters

string $identifier: A SQL expression to be used as an identifier

Returns

stdClass
An object representing a database identifier to be used in a query

introspectType()source public

introspectType( string $value )

Guesses the data type of an array

Parameters

string $value: The value to introspect for type data.

Returns

string

isConnected()source public

isConnected( )

Checks if the source is connected to the database.

Returns

boolean
True if the database is connected, else false

lastAffected()source public

lastAffected( mixed $source null )

Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.

Parameters

mixed $source optional null: The source to check.

Returns

integer
Number of affected rows

Overrides

DataSource::lastAffected()

lastError()source public

lastError( PDOStatement $query null )

Returns a formatted error message from previous database operation.

Parameters

PDOStatement $query optional null: the query to extract the error from if any

Returns

string
Error message with error number

lastInsertId()source public

lastInsertId( mixed $source null )

Returns the ID generated from the previous INSERT operation.

Parameters

mixed $source optional null: The source to get an id for.

Returns

mixed

Overrides

DataSource::lastInsertId()

lastNumRows()source public

lastNumRows( mixed $source null )

Returns number of rows in previous resultset. If no previous resultset exists, this returns false.

Parameters

mixed $source optional null: Not used

Returns

integer
Number of rows in resultset

Overrides

DataSource::lastNumRows()

length()source public

length( string $real )

Gets the length of a database-native column description, or null if no length

Parameters

string $real: Real database-layer column type (i.e. "varchar(255)")

Returns

mixed
An integer or string representing the length of the column, or null for unknown length.

limit()source public

limit( integer $limit , integer $offset null )

Returns a limit statement in the correct format for the particular database.

Parameters

integer $limit: Limit of results returned
integer $offset optional null: Offset from which to start results

Returns

string
SQL limit/offset statement

logQuery()source public

logQuery( string $sql , array $params array() )

Log given SQL query.

Parameters

string $sql: SQL statement
array $params optional array(): Values binded to the query (prepared statements)

name()source public

name( mixed $data )

Returns a quoted name of $data for use in an SQL statement. Strips fields out of SQL functions before quoting.

Parameters

mixed $data: Either a string with a column to quote. An array of columns to quote or an object from DboSource::expression() or DboSource::identifier()

Returns

string
SQL field

order()source public

order( array|string $keys , string $direction 'ASC' , Model $Model null )

Returns an ORDER BY clause as a string.

Parameters

array|string $keys: Field reference, as a key (i.e. Post.title)
string $direction optional 'ASC': Direction (ASC or DESC)
Model $Model optional null: Model reference (used to look for virtual field)

Returns

string
ORDER BY clause

prepareFields()source public

prepareFields( Model $Model , array $queryData )

Prepares fields required by an SQL statement.

When no fields are set, all the $Model fields are returned.

Parameters

Model $Model: The model to prepare.
array $queryData: An array of queryData information containing keys similar to Model::find().

Returns

array
Array containing SQL fields.

query()source public

query( )

DataSource Query abstraction

Returns

resource
Result resource identifier.

queryAssociation()source public

queryAssociation( Model $Model , Model $LinkModel , string $type , string $association , array $assocData , array $queryData , boolean $external , array $resultSet , integer $recursive , array $stack )

Queries associations.

Used to fetch results on recursive models.

'hasMany' associations with no limit set: Fetch, filter and merge is done recursively for every level.
'hasAndBelongsToMany' associations: Fetch and filter is done unaffected by the (recursive) level set.

Parameters

Model $Model: Primary Model object.
Model $LinkModel: Linked model object.
string $type: Association type, one of the model association types ie. hasMany.
string $association: Association name.
array $assocData: Association data.
array $queryData: $queryData An array of queryData information containing keys similar to Model::find().
boolean $external: Whether or not the association query is on an external datasource.
array $resultSet: $resultSet Existing results.
integer $recursive: Number of levels of association.
array $stack: A list with joined models.

Returns

mixed

Throws

CakeException
when results cannot be created.

rawQuery()source public

rawQuery( string $sql , array $params array() )

Executes given SQL statement.

Parameters

string $sql: SQL statement
array $params optional array(): Additional options for the query.

Returns

mixed
Resource or object representing the result set, or false on failure

read()source public

read( Model $Model , array $queryData array() , integer $recursive null )

The "R" in CRUD

Reads record(s) from the database.

Parameters

Model $Model: A Model object that the query is for.
array $queryData optional array(): An array of queryData information containing keys similar to Model::find().
integer $recursive optional null: Number of levels of association

Returns

mixed
boolean false on error/failure. An array of results on success.

Overrides

DataSource::read()

readTableParameters()source public

readTableParameters( string $name )

Read additional table parameters

Parameters

string $name: The table name to read.

Returns

array

reconnect()source public

reconnect( array $config array() )

Reconnects to database server with optional new settings

Parameters

array $config optional array(): An array defining the new configuration settings

Returns

boolean
True on success, false on failure

renderJoinStatement()source public

renderJoinStatement( array $data )

Renders a final SQL JOIN statement

Parameters

array $data: The data to generate a join statement for.

Returns

string

renderStatement()source public

renderStatement( string $type , array $data )

Renders a final SQL statement by putting together the component parts in the correct order

Parameters

string $type: type of query being run. e.g select, create, update, delete, schema, alter.
array $data: Array of data to insert into the query.

Returns

string|null
Rendered SQL expression to be run, otherwise null.

resetSequence()source public

resetSequence( string $table , string $column )

Reset a sequence based on the MAX() value of $column. Useful for resetting sequences after using insertMulti().

This method should be implemented by datasources that require sequences to be used.

Parameters

string $table: The name of the table to update.
string $column: The column to use when resetting the sequence value.

Returns

boolean
Success.

resolveKey()source public

resolveKey( Model $Model , string $key , string $assoc null )

Returns a key formatted like a string Model.fieldname(i.e. Post.title, or Country.name)

Parameters

Model $Model: The model to get a key for.
string $key: The key field.
string $assoc optional null: The association name.

Returns

string

Overrides

DataSource::resolveKey()

rollback()source public

rollback( )

Rollback a transaction

Returns

boolean

True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).

Overrides

DataSource::rollback()

showLog()source public

showLog( boolean $sorted false )

Outputs the contents of the queries log. If in a non-CLI environment the sql_log element will be rendered and output. If in a CLI environment, a plain text log is generated.

Parameters

boolean $sorted optional false: Get the queries sorted by time taken, defaults to false.

truncate()source public

truncate( Model|string $table )

Deletes all the records in a table and resets the count of the auto-incrementing primary key, where applicable.

Parameters

Model|string $table: A string or model class representing the table to be truncated

Returns

boolean
SQL TRUNCATE TABLE statement, false if not applicable.

Methods inherited from DataSource

_cacheDescription()source protected

_cacheDescription( string $object , mixed $data null )

Cache the DataSource description

Parameters

string $object: The name of the object (model) to cache
mixed $data optional null: The description of the model, usually a string or array

Returns

mixed

insertQueryData()source public

insertQueryData( string $query , array $data , string $association , Model $Model , array $stack )

Replaces {$__cakeID__$} and {$__cakeForeignKey__$} placeholders in query data.

Parameters

string $query: Query string needing replacements done.
array $data: Array of data with values that will be inserted in placeholders.
string $association: Name of association model being replaced.
Model $Model: Model instance.
array $stack: The context stack.

Returns

mixed
String of query data with placeholders replaced, or false on failure.

setConfig()source public

setConfig( array $config array() )

Sets the configuration for the DataSource. Merges the $config information with the _baseConfig and the existing $config property.

Parameters

array $config optional array(): The configuration array

Methods inherited from Object

_mergeVars()source protected

_mergeVars( array $properties , string $class , boolean $normalize true )

Merges this objects $property with the property in $class' definition. This classes value for the property will be merged on top of $class'

This provides some of the DRY magic CakePHP provides. If you want to shut it off, redefine this method as an empty function.

Parameters

array $properties: The name of the properties to merge.
string $class: The class to merge the property with.
boolean $normalize optional true: Set to true to run the properties through Hash::normalize() before merging.

_set()source protected

_set( array $properties array() )

Allows setting of multiple properties of the object in a single line of code. Will only set properties that are part of a class declaration.

Parameters

array $properties optional array(): An associative array containing properties and corresponding values.

_stop()source protected

_stop( integer|string $status 0 )

Stop execution of the current script. Wraps exit() making testing easier.

Parameters

integer|string $status optional 0: see http://php.net/exit for values

dispatchMethod()source public

dispatchMethod( string $method , array $params array() )

Calls a method on this object with the given parameters. Provides an OO wrapper for call_user_func_array

Parameters

string $method: Name of the method to call
array $params optional array(): Parameter list to use when calling $method

Returns

mixed
Returns the result of the method call

log()source public

log( string $msg , integer $type LOG_ERR , null|string|array $scope null )

Convenience method to write a message to CakeLog. See CakeLog::write() for more information on writing to logs.

Parameters

string $msg: Log message
integer $type optional LOG_ERR: Error type constant. Defined in app/Config/core.php.
null|string|array $scope optional null: The scope(s) a log message is being created in. See CakeLog::config() for more information on logging scopes.

Returns

boolean
Success of log write

requestAction()source public

requestAction( string|array $url , array $extra array() )

Calls a controller's method from any location. Can be used to connect controllers together or tie plugins into a main application. requestAction can be used to return rendered views or fetch the return value from controller actions.

Under the hood this method uses Router::reverse() to convert the $url parameter into a string URL. You should use URL formats that are compatible with Router::reverse()

Passing POST and GET data

POST and GET data can be simulated in requestAction. Use $extra['url'] for GET data. The $extra['data'] parameter allows POST data simulation.

Parameters

string|array $url: String or array-based URL. Unlike other URL arrays in CakePHP, this URL will not automatically handle passed and named arguments in the $url parameter.
array $extra optional array(): if array includes the key "return" it sets the AutoRender to true. Can also be used to submit GET/POST data, and named/passed arguments.

Returns

mixed

Boolean true or false on success/failure, or contents of rendered action if 'return' is set in $extra.

toString()source public

toString( )

Object-to-string conversion. Each class can override this method as necessary.

Returns

string
The name of this class

Properties detail

$_baseConfigsource

protected array

Base configuration settings for MySQL driver

array(
    'persistent' => true,
    'host' => 'localhost',
    'login' => 'root',
    'password' => '',
    'database' => 'cake',
    'port' => '3306',
    'flags' => array()
)

$_charsetssource

protected array

Mapping of collation names to character set names

array()

$_connectionsource

protected PDO

Reference to the PDO object connection

null

$_useAliassource

protected boolean

use alias for update and delete. Set to true if version >= 4.1

true

$columnssource

public array

MySQL column definition

array(
    'primary_key' => array('name' => 'NOT NULL AUTO_INCREMENT'),
    'string' => array('name' => 'varchar', 'limit' => '255'),
    'text' => array('name' => 'text'),
    'biginteger' => array('name' => 'bigint', 'limit' => '20'),
    'integer' => array('name' => 'int', 'limit' => '11', 'formatter' => 'intval'),
    'float' => array('name' => 'float', 'formatter' => 'floatval'),
    'decimal' => array('name' => 'decimal', 'formatter' => 'floatval'),
    'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
    'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
    'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'),
    'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),
    'binary' => array('name' => 'blob'),
    'boolean' => array('name' => 'tinyint', 'limit' => '1')
)

$descriptionsource

public string

Datasource description

"MySQL DBO Driver"

$endQuotesource

public string

End quote

"`"

$fieldParameterssource

public array

List of engine specific additional field parameters used on table creating

array(
    'charset' => array('value' => 'CHARACTER SET', 'quote' => false, 'join' => ' ', 'column' => false, 'position' => 'beforeDefault'),
    'collate' => array('value' => 'COLLATE', 'quote' => false, 'join' => ' ', 'column' => 'Collation', 'position' => 'beforeDefault'),
    'comment' => array('value' => 'COMMENT', 'quote' => true, 'join' => ' ', 'column' => 'Comment', 'position' => 'afterDefault'),
    'unsigned' => array(
        'value' => 'UNSIGNED', 'quote' => false, 'join' => ' ', 'column' => false, 'position' => 'beforeDefault',
        'noVal' => true,
        'options' => array(true),
        'types' => array('integer', 'float', 'decimal', 'biginteger')
    )
)

$startQuotesource

public string

Start quote

"`"

$tableParameterssource

public array

List of table engine specific parameters used on table creating

array(
    'charset' => array('value' => 'DEFAULT CHARSET', 'quote' => false, 'join' => '=', 'column' => 'charset'),
    'collate' => array('value' => 'COLLATE', 'quote' => false, 'join' => '=', 'column' => 'Collation'),
    'engine' => array('value' => 'ENGINE', 'quote' => false, 'join' => '=', 'column' => 'Engine'),
    'comment' => array('value' => 'COMMENT', 'quote' => true, 'join' => '=', 'column' => 'Comment'),
)

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Licensed under the MIT License.
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http://api.cakephp.org/2.8/class-Mysql.html