Trait QueryTrait

__callsource public

__call( string $method , array $arguments )

Enables calling methods from the result set as if they were from this class

Parameters

string $method

the method to call

array $arguments

list of arguments for the method to call

Returns

mixed
mixed

Throws

BadMethodCallException
if no such method exists in result set

_decorateResultssource protected

_decorateResults( Traversable $result )

Decorates the results iterator with MapReduce routines and formatters

Parameters

Traversable $result

Original results

Returns

Cake\Datasource\ResultSetInterface
\Cake\Datasource\ResultSetInterface

_decoratorClasssource protected

_decoratorClass( )

Returns the name of the class to be used for decorating results

Returns

string
string

_executesource abstract protected

_execute( )

Executes this query and returns a traversable object containing the results

Returns

Traversable
\Traversable

aliasFieldsource public

aliasField( string $field , string $alias null )

Returns a key => value array representing a single aliased field that can be passed directly to the select() method. The key will contain the alias and the value the actual field name.

If the field is already aliased, then it will not be changed. If no $alias is passed, the default table for this query will be used.

Parameters

string $field

The field to alias

string $alias optional null

the alias used to prefix the field

Returns

array
array

aliasFieldssource public

aliasFields( array $fields , string|null $defaultAlias null )

Runs aliasField() for each field in the provided list and returns the result under a single array.

Parameters

array $fields

The fields to alias

string|null $defaultAlias optional null

The default alias

Returns

array
array

allsource public

all( )

Fetch the results for this query.

Will return either the results set through setResult(), or execute this query and return the ResultSetDecorator object ready for streaming of results.

ResultSetDecorator is a traversable object that implements the methods found on Cake\Collection\Collection.

Returns

Cake\Datasource\ResultSetInterface
\Cake\Datasource\ResultSetInterface

applyOptionssource abstract public

applyOptions( array $options )

Populates or adds parts to current query clauses using an array. This is handy for passing all query clauses at once.

Parameters

array $options

the options to be applied

Returns

mixed
$this This object

cachesource public

cache( false|string|Closure $key , string|Cake\Cache\CacheEngine $config 'default' )

Enable result caching for this query.

If a query has caching enabled, it will do the following when executed:

• Check the cache for $key. If there are results no SQL will be executed. Instead the cached results will be returned.
• When the cached data is stale/missing the result set will be cached as the query is executed.

Usage

// Simple string key + config
$query->cache('my_key', 'db_results');

// Function to generate key.
$query->cache(function ($q) {
  $key = serialize($q->clause('select'));
  $key .= serialize($q->clause('where'));
  return md5($key);
});

// Using a pre-built cache engine.
$query->cache('my_key', $engine);

// Disable caching
$query->cache(false);

Parameters

false|string|Closure $key

Either the cache key or a function to generate the cache key. When using a function, this query instance will be supplied as an argument.

string|Cake\Cache\CacheEngine $config optional 'default'

Either the name of the cache config to use, or a cache config instance.

Returns

mixed
$this This instance

eagerLoadedsource public

eagerLoaded( boolean|null $value null )

Sets the query instance to be an eager loaded query. If no argument is passed, the current configured query _eagerLoaded value is returned.

Parameters

boolean|null $value optional null

Whether or not to eager load.

Returns

mixed
$this|\Cake\ORM\Query

firstsource public

first( )

Returns the first result out of executing this query, if the query has not been executed before, it will set the limit clause to 1 for performance reasons.

Example:

$singleUser = $query->select(['id', 'username'])->first();

Returns

mixed
the first result from the ResultSet

firstOrFailsource public

firstOrFail( )

Get the first result from the executing query or raise an exception.

Returns

mixed
The first result from the ResultSet.

Throws

Cake\Datasource\Exception\RecordNotFoundException
When there is no first record.

formatResultssource public

formatResults( callable $formatter null , boolean|integer $mode 0 )

Registers a new formatter callback function that is to be executed when trying to fetch the results from the database.

Formatting callbacks will get a first parameter, a ResultSetDecorator, that can be traversed and modified at will.

Callbacks are required to return an iterator object, which will be used as the return value for this query's result. Formatter functions are applied after all the MapReduce routines for this query have been executed.

If the first argument is set to null, it will return the list of previously registered map reduce routines.

If the second argument is set to true, it will erase previous formatters and replace them with the passed first argument.

Example:

// Return all results from the table indexed by id
$query->select(['id', 'name'])->formatResults(function ($results) {
  return $results->indexBy('id');
});

// Add a new column to the ResultSet
$query->select(['name', 'birth_date'])->formatResults(function ($results) {
  return $results->map(function ($row) {
    $row['age'] = $row['birth_date']->diff(new DateTime)->y;
    return $row;
  });
});

Parameters

callable $formatter optional null

The formatting callable.

boolean|integer $mode optional 0

Whether or not to overwrite, append or prepend the formatter.

Returns

mixed
$this|array

getIteratorsource public

getIterator( )

Executes this query and returns a results iterator. This function is required for implementing the IteratorAggregate interface and allows the query to be iterated without having to call execute() manually, thus making it look like a result set instead of the query itself.

Returns

Iterator
\Iterator

getOptionssource public

getOptions( )

Returns an array with the custom options that were applied to this query and that were not already processed by another method in this class.

Example:

$query->applyOptions(['doABarrelRoll' => true, 'fields' => ['id', 'name']);
$query->getOptions(); // Returns ['doABarrelRoll' => true]

Returns

array
array

See

\Cake\ORM\Query::applyOptions() to read about the options that will be processed by this class and not returned by this function

mapReducesource public

mapReduce( callable $mapper null , callable $reducer null , boolean $overwrite false )

Register a new MapReduce routine to be executed on top of the database results Both the mapper and caller callable should be invokable objects.

The MapReduce routing will only be run when the query is executed and the first result is attempted to be fetched.

If the first argument is set to null, it will return the list of previously registered map reduce routines.

If the third argument is set to true, it will erase previous map reducers and replace it with the arguments passed.

Parameters

callable $mapper optional null

The mapper callable.

callable $reducer optional null

The reducing function.

boolean $overwrite optional false

Set to true to overwrite existing map + reduce functions.

Returns

mixed
$this|array

See

\Cake\Collection\Iterator\MapReduce for details on how to use emit data to the map reducer.

repositorysource public

repository( Cake\Datasource\RepositoryInterface $table null )

Returns the default table object that will be used by this query, that is, the table that will appear in the from clause.

When called with a Table argument, the default table object will be set and this query object will be returned for chaining.

Parameters

Cake\Datasource\RepositoryInterface $table optional null

The default table object to use

Returns

Cake\Datasource\RepositoryInterface|$this
$this

setResultsource public

setResult( Cake\Datasource\ResultSetInterface $results )

Set the result set for a query.

Setting the resultset of a query will make execute() a no-op. Instead of executing the SQL query and fetching results, the ResultSet provided to this method will be returned.

This method is most useful when combined with results stored in a persistent cache.

Parameters

Cake\Datasource\ResultSetInterface $results

The results this query should return.

Returns

mixed
$this The query instance.

toArraysource public

toArray( )

Returns an array representation of the results after executing the query.

Returns

array
array

false

[]

[]

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