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|
Expressions
===========
The ``Doctrine\Common\Collections\Expr\Comparison`` class
can be used to create comparison expressions to be used with the
``Doctrine\Common\Collections\Criteria`` class. It has the
following operator constants:
- ``Comparison::EQ``
- ``Comparison::NEQ``
- ``Comparison::LT``
- ``Comparison::LTE``
- ``Comparison::GT``
- ``Comparison::GTE``
- ``Comparison::IS``
- ``Comparison::IN``
- ``Comparison::NIN``
- ``Comparison::CONTAINS``
- ``Comparison::MEMBER_OF``
- ``Comparison::STARTS_WITH``
- ``Comparison::ENDS_WITH``
The ``Doctrine\Common\Collections\Expr\CompositeExpression`` class
can be used to create composite expressions to be used with the
``Doctrine\Common\Collections\Criteria`` class. It has the
following operator constants:
- ``CompositeExpression::TYPE_AND``
- ``CompositeExpression::TYPE_OR``
- ``CompositeExpression::TYPE_NOT``
When using the ``TYPE_OR`` and ``TYPE_AND`` operators the
``CompositeExpression`` accepts multiple expressions as parameter
but only one expression can be provided when using the ``NOT`` operator.
The ``Doctrine\Common\Collections\Criteria`` class has the following
API to be used with expressions:
where
-----
Sets the where expression to evaluate when this Criteria is searched for.
.. code-block:: php
$expr = new Comparison('key', Comparison::EQ, 'value');
$criteria->where($expr);
andWhere
--------
Appends the where expression to evaluate when this Criteria is searched for
using an AND with previous expression.
.. code-block:: php
$expr = new Comparison('key', Comparison::EQ, 'value');
$criteria->andWhere($expr);
orWhere
-------
Appends the where expression to evaluate when this Criteria is searched for
using an OR with previous expression.
.. code-block:: php
$expr1 = new Comparison('key', Comparison::EQ, 'value1');
$expr2 = new Comparison('key', Comparison::EQ, 'value2');
$criteria->where($expr1);
$criteria->orWhere($expr2);
orderBy
-------
Sets the ordering of the result of this Criteria.
.. code-block:: php
use Doctrine\Common\Collections\Order;
$criteria->orderBy(['name' => Order::Ascending]);
setFirstResult
--------------
Set the number of first result that this Criteria should return.
.. code-block:: php
$criteria->setFirstResult(0);
getFirstResult
--------------
Gets the current first result option of this Criteria.
.. code-block:: php
$criteria->setFirstResult(10);
echo $criteria->getFirstResult(); // 10
setMaxResults
-------------
Sets the max results that this Criteria should return.
.. code-block:: php
$criteria->setMaxResults(20);
getMaxResults
-------------
Gets the current max results option of this Criteria.
.. code-block:: php
$criteria->setMaxResults(20);
echo $criteria->getMaxResults(); // 20
|
