Class CallbackStatement

Wraps a statement in a callback that allows row results to be modified when being fetched.

This is used by CakePHP to eagerly load association data.

Cake\Database\Statement\StatementDecorator implements Cake\Database\StatementInterface, Countable, IteratorAggregate uses Cake\Database\TypeConverterTrait
Extended by Cake\Database\Statement\CallbackStatement

Method Detail

__constructsource public

__construct( Cake\Database\StatementInterface $statement , Cake\Database\Driver $driver , callable $callback )

Constructor

Parameters

Cake\Database\StatementInterface $statement
The statement to decorate.
Cake\Database\Driver $driver
The driver instance used by the statement.
callable $callback
The callback to apply to results before they are returned.

Overrides

Cake\Database\Statement\StatementDecorator::__construct()

fetchsource public

fetch( string $type 'num' )

Fetch a row from the statement.

The result will be processed by the callback when it is not false.

Parameters

string $type optional 'num'
Either 'num' or 'assoc' to indicate the result format you would like.

Returns

array|false
array|false

Overrides

Cake\Database\Statement\StatementDecorator::fetch()

fetchAllsource public

fetchAll( string $type 'num' )

Fetch all rows from the statement.

Each row in the result will be processed by the callback when it is not `false.

Parameters

string $type optional 'num'
Either 'num' or 'assoc' to indicate the result format you would like.

Returns

array
array

Overrides

Cake\Database\Statement\StatementDecorator::fetchAll()

Methods inherited from Cake\Database\Statement\StatementDecorator

__getsource public

__get( string $property )

Magic getter to return $queryString as read-only.

Parameters

string $property
internal property to get

Returns

mixed
mixed

bindsource public

bind( array $params , array $types )

Binds a set of values to statement object with corresponding type.

Parameters

array $params
list of values to be bound
array $types
list of types to be used, keys should match those in $params

Implementation of

Cake\Database\StatementInterface::bind()

bindValuesource public

bindValue( string|integer $column , mixed $value , string $type 'string' )

Assign a value to a positional or named variable in prepared query. If using positional variables you need to start with index one, if using named params then just use the name in any order.

It is not allowed to combine positional and named variables in the same statement.

Examples:

$statement->bindValue(1, 'a title');
$statement->bindValue('active', true, 'boolean');
$statement->bindValue(5, new \DateTime(), 'date');

Parameters

string|integer $column
name or param position to be bound
mixed $value
The value to bind to variable in query
string $type optional 'string'
name of configured Type class

Implementation of

Cake\Database\StatementInterface::bindValue()

closeCursorsource public

closeCursor( )

Closes a cursor in the database, freeing up any resources and memory allocated to it. In most cases you don't need to call this method, as it is automatically called after fetching all results from the result set.

Implementation of

Cake\Database\StatementInterface::closeCursor()

columnCountsource public

columnCount( )

Returns the number of columns this statement's results will contain.

Example:

$statement = $connection->prepare('SELECT id, title from articles');
$statement->execute();
echo $statement->columnCount(); // outputs 2

Returns

integer
int

Implementation of

Cake\Database\StatementInterface::columnCount()

countsource public

count( )

Statements can be passed as argument for count() to return the number for affected rows from last execution.

Returns

integer
int

Implementation of

Cake\Database\StatementInterface::count()

errorCodesource public

errorCode( )

Returns the error code for the last error that occurred when executing this statement.

Returns

integer|string
int|string

Implementation of

Cake\Database\StatementInterface::errorCode()

errorInfosource public

errorInfo( )

Returns the error information for the last error that occurred when executing this statement.

Returns

array
array

Implementation of

Cake\Database\StatementInterface::errorInfo()

executesource public

execute( array|null $params null )

Executes the statement by sending the SQL query to the database. It can optionally take an array or arguments to be bound to the query variables. Please note that binding parameters from this method will not perform any custom type conversion as it would normally happen when calling bindValue.

Parameters

array|null $params optional null
list of values to be bound to query

Returns

boolean
true on success, false otherwise

Implementation of

Cake\Database\StatementInterface::execute()

getInnerStatementsource public

getInnerStatement( )

Returns the statement object that was decorated by this class.

Returns

Cake\Database\StatementInterface
\Cake\Database\StatementInterface

getIteratorsource public

getIterator( )

Statements are iterable as arrays, this method will return the iterator object for traversing all items in the result.

Example:

$statement = $connection->prepare('SELECT id, title from articles');
foreach ($statement as $row) {
  //do stuff
}

Returns

Iterator
\Iterator

Implementation of

IteratorAggregate::getIterator()

lastInsertIdsource public

lastInsertId( string|null $table null , string|null $column null )

Returns the latest primary inserted using this statement.

Parameters

string|null $table optional null
table name or sequence to get last insert value from
string|null $column optional null
the name of the column representing the primary key

Returns

string
string

Implementation of

Cake\Database\StatementInterface::lastInsertId()

rowCountsource public

rowCount( )

Returns the number of rows affected by this SQL statement.

Example:

$statement = $connection->prepare('SELECT id, title from articles');
$statement->execute();
print_r($statement->rowCount()); // will show 1

Returns

integer
int

Implementation of

Cake\Database\StatementInterface::rowCount()

Methods used from Cake\Database\TypeConverterTrait

castsource public

cast( mixed $value , Cake\Database\Type|string $type )

Converts a give value to a suitable database value based on type and return relevant internal statement type

Parameters

mixed $value
The value to cast
Cake\Database\Type|string $type
The type name or type instance to use.

Returns

array
list containing converted value and internal type

matchTypessource public

matchTypes( array $columns , array $types )

Matches columns to corresponding types

Both $columns and $types should either be numeric based or string key based at the same time.

Parameters

array $columns
list or associative array of columns and parameters to be bound with types
array $types
list or associative array of types

Returns

array
array

Properties summary

$_callbacksource

protected callable

A callback function to be applied to results.

Properties inherited from Cake\Database\Statement\StatementDecorator

$_driversource

protected Cake\Database\Driver

Reference to the driver object associated to this statement.

$_hasExecutedsource

protected boolean

Whether or not this statement has already been executed

false

$_statementsource

protected mixed

Statement instance implementation, such as PDOStatement or any other custom implementation.

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http://api.cakephp.org/3.1/class-Cake.Database.Statement.CallbackStatement.html