upgrade

vendor/symfony/doctrine-bridge/Form/ChoiceList/DoctrineChoiceLoader.php

@@ -0,0 +1,154 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Doctrine\Form\ChoiceList;
+
+use Doctrine\Common\Persistence\ObjectManager;
+use Symfony\Component\Form\ChoiceList\ChoiceListInterface;
+use Symfony\Component\Form\ChoiceList\Factory\ChoiceListFactoryInterface;
+use Symfony\Component\Form\ChoiceList\Loader\ChoiceLoaderInterface;
+
+/**
+ * Loads choices using a Doctrine object manager.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class DoctrineChoiceLoader implements ChoiceLoaderInterface
+{
+    private $factory;
+    private $manager;
+    private $class;
+    private $idReader;
+    private $objectLoader;
+
+    /**
+     * @var ChoiceListInterface
+     */
+    private $choiceList;
+
+    /**
+     * Creates a new choice loader.
+     *
+     * Optionally, an implementation of {@link EntityLoaderInterface} can be
+     * passed which optimizes the object loading for one of the Doctrine
+     * mapper implementations.
+     *
+     * @param ChoiceListFactoryInterface $factory      The factory for creating the loaded choice list
+     * @param ObjectManager              $manager      The object manager
+     * @param string                     $class        The class name of the loaded objects
+     * @param IdReader                   $idReader     The reader for the object IDs
+     * @param EntityLoaderInterface|null $objectLoader The objects loader
+     */
+    public function __construct(ChoiceListFactoryInterface $factory, ObjectManager $manager, $class, IdReader $idReader = null, EntityLoaderInterface $objectLoader = null)
+    {
+        $classMetadata = $manager->getClassMetadata($class);
+
+        $this->factory = $factory;
+        $this->manager = $manager;
+        $this->class = $classMetadata->getName();
+        $this->idReader = $idReader ?: new IdReader($manager, $classMetadata);
+        $this->objectLoader = $objectLoader;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function loadChoiceList($value = null)
+    {
+        if ($this->choiceList) {
+            return $this->choiceList;
+        }
+
+        $objects = $this->objectLoader
+            ? $this->objectLoader->getEntities()
+            : $this->manager->getRepository($this->class)->findAll();
+
+        $this->choiceList = $this->factory->createListFromChoices($objects, $value);
+
+        return $this->choiceList;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function loadValuesForChoices(array $choices, $value = null)
+    {
+        // Performance optimization
+        if (empty($choices)) {
+            return array();
+        }
+
+        // Optimize performance for single-field identifiers. We already
+        // know that the IDs are used as values
+        $optimize = null === $value || \is_array($value) && $value[0] === $this->idReader;
+
+        // Attention: This optimization does not check choices for existence
+        if ($optimize && !$this->choiceList && $this->idReader->isSingleId()) {
+            $values = array();
+
+            // Maintain order and indices of the given objects
+            foreach ($choices as $i => $object) {
+                if ($object instanceof $this->class) {
+                    // Make sure to convert to the right format
+                    $values[$i] = (string) $this->idReader->getIdValue($object);
+                }
+            }
+
+            return $values;
+        }
+
+        return $this->loadChoiceList($value)->getValuesForChoices($choices);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function loadChoicesForValues(array $values, $value = null)
+    {
+        // Performance optimization
+        // Also prevents the generation of "WHERE id IN ()" queries through the
+        // object loader. At least with MySQL and on the development machine
+        // this was tested on, no exception was thrown for such invalid
+        // statements, consequently no test fails when this code is removed.
+        // https://github.com/symfony/symfony/pull/8981#issuecomment-24230557
+        if (empty($values)) {
+            return array();
+        }
+
+        // Optimize performance in case we have an object loader and
+        // a single-field identifier
+        $optimize = null === $value || \is_array($value) && $value[0] === $this->idReader;
+
+        if ($optimize && !$this->choiceList && $this->objectLoader && $this->idReader->isSingleId()) {
+            $unorderedObjects = $this->objectLoader->getEntitiesByIds($this->idReader->getIdField(), $values);
+            $objectsById = array();
+            $objects = array();
+
+            // Maintain order and indices from the given $values
+            // An alternative approach to the following loop is to add the
+            // "INDEX BY" clause to the Doctrine query in the loader,
+            // but I'm not sure whether that's doable in a generic fashion.
+            foreach ($unorderedObjects as $object) {
+                $objectsById[(string) $this->idReader->getIdValue($object)] = $object;
+            }
+
+            foreach ($values as $i => $id) {
+                if (isset($objectsById[$id])) {
+                    $objects[$i] = $objectsById[$id];
+                }
+            }
+
+            return $objects;
+        }
+
+        return $this->loadChoiceList($value)->getChoicesForValues($values);
+    }
+}

vendor/symfony/doctrine-bridge/Form/ChoiceList/EntityChoiceList.php

@@ -0,0 +1,540 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Doctrine\Form\ChoiceList;
+
+@trigger_error('The '.__NAMESPACE__.'\EntityChoiceList class is deprecated since Symfony 2.7 and will be removed in 3.0. Use Symfony\Bridge\Doctrine\Form\ChoiceList\DoctrineChoiceLoader instead.', E_USER_DEPRECATED);
+
+use Doctrine\Common\Persistence\Mapping\ClassMetadata;
+use Doctrine\Common\Persistence\ObjectManager;
+use Symfony\Component\Form\Exception\RuntimeException;
+use Symfony\Component\Form\Exception\StringCastException;
+use Symfony\Component\Form\Extension\Core\ChoiceList\ObjectChoiceList;
+use Symfony\Component\PropertyAccess\PropertyAccessorInterface;
+
+/**
+ * A choice list presenting a list of Doctrine entities as choices.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @deprecated Deprecated since Symfony 2.7, to be removed in Symfony 3.0.
+ *             Use {@link DoctrineChoiceLoader} instead.
+ */
+class EntityChoiceList extends ObjectChoiceList
+{
+    /**
+     * @var ObjectManager
+     */
+    private $em;
+
+    /**
+     * @var string
+     */
+    private $class;
+
+    /**
+     * @var ClassMetadata
+     */
+    private $classMetadata;
+
+    /**
+     * Metadata for target class of primary key association.
+     *
+     * @var ClassMetadata
+     */
+    private $idClassMetadata;
+
+    /**
+     * Contains the query builder that builds the query for fetching the
+     * entities.
+     *
+     * This property should only be accessed through queryBuilder.
+     *
+     * @var EntityLoaderInterface
+     */
+    private $entityLoader;
+
+    /**
+     * The identifier field, if the identifier is not composite.
+     *
+     * @var array
+     */
+    private $idField = null;
+
+    /**
+     * Whether to use the identifier for index generation.
+     *
+     * @var bool
+     */
+    private $idAsIndex = false;
+
+    /**
+     * Whether to use the identifier for value generation.
+     *
+     * @var bool
+     */
+    private $idAsValue = false;
+
+    /**
+     * Whether the entities have already been loaded.
+     *
+     * @var bool
+     */
+    private $loaded = false;
+
+    /**
+     * The preferred entities.
+     *
+     * @var array
+     */
+    private $preferredEntities = array();
+
+    /**
+     * Creates a new entity choice list.
+     *
+     * @param ObjectManager             $manager           An EntityManager instance
+     * @param string                    $class             The class name
+     * @param string                    $labelPath         The property path used for the label
+     * @param EntityLoaderInterface     $entityLoader      An optional query builder
+     * @param array|\Traversable|null   $entities          An array of choices or null to lazy load
+     * @param array                     $preferredEntities An array of preferred choices
+     * @param string                    $groupPath         A property path pointing to the property used
+     *                                                     to group the choices. Only allowed if
+     *                                                     the choices are given as flat array.
+     * @param PropertyAccessorInterface $propertyAccessor  The reflection graph for reading property paths
+     */
+    public function __construct(ObjectManager $manager, $class, $labelPath = null, EntityLoaderInterface $entityLoader = null, $entities = null, array $preferredEntities = array(), $groupPath = null, PropertyAccessorInterface $propertyAccessor = null)
+    {
+        $this->em = $manager;
+        $this->entityLoader = $entityLoader;
+        $this->classMetadata = $manager->getClassMetadata($class);
+        $this->class = $this->classMetadata->getName();
+        $this->loaded = \is_array($entities) || $entities instanceof \Traversable;
+        $this->preferredEntities = $preferredEntities;
+        list(
+            $this->idAsIndex,
+            $this->idAsValue,
+            $this->idField
+        ) = $this->getIdentifierInfoForClass($this->classMetadata);
+
+        if (null !== $this->idField && $this->classMetadata->hasAssociation($this->idField)) {
+            $this->idClassMetadata = $this->em->getClassMetadata(
+                $this->classMetadata->getAssociationTargetClass($this->idField)
+            );
+
+            list(
+                $this->idAsIndex,
+                $this->idAsValue
+            ) = $this->getIdentifierInfoForClass($this->idClassMetadata);
+        }
+
+        if (!$this->loaded) {
+            // Make sure the constraints of the parent constructor are
+            // fulfilled
+            $entities = array();
+        }
+
+        parent::__construct($entities, $labelPath, $preferredEntities, $groupPath, null, $propertyAccessor);
+    }
+
+    /**
+     * Returns the list of entities.
+     *
+     * @return array
+     *
+     * @see ChoiceListInterface
+     */
+    public function getChoices()
+    {
+        if (!$this->loaded) {
+            $this->load();
+        }
+
+        return parent::getChoices();
+    }
+
+    /**
+     * Returns the values for the entities.
+     *
+     * @return array
+     *
+     * @see ChoiceListInterface
+     */
+    public function getValues()
+    {
+        if (!$this->loaded) {
+            $this->load();
+        }
+
+        return parent::getValues();
+    }
+
+    /**
+     * Returns the choice views of the preferred choices as nested array with
+     * the choice groups as top-level keys.
+     *
+     * @return array
+     *
+     * @see ChoiceListInterface
+     */
+    public function getPreferredViews()
+    {
+        if (!$this->loaded) {
+            $this->load();
+        }
+
+        return parent::getPreferredViews();
+    }
+
+    /**
+     * Returns the choice views of the choices that are not preferred as nested
+     * array with the choice groups as top-level keys.
+     *
+     * @return array
+     *
+     * @see ChoiceListInterface
+     */
+    public function getRemainingViews()
+    {
+        if (!$this->loaded) {
+            $this->load();
+        }
+
+        return parent::getRemainingViews();
+    }
+
+    /**
+     * Returns the entities corresponding to the given values.
+     *
+     * @return array
+     *
+     * @see ChoiceListInterface
+     */
+    public function getChoicesForValues(array $values)
+    {
+        // Performance optimization
+        // Also prevents the generation of "WHERE id IN ()" queries through the
+        // entity loader. At least with MySQL and on the development machine
+        // this was tested on, no exception was thrown for such invalid
+        // statements, consequently no test fails when this code is removed.
+        // https://github.com/symfony/symfony/pull/8981#issuecomment-24230557
+        if (empty($values)) {
+            return array();
+        }
+
+        if (!$this->loaded) {
+            // Optimize performance in case we have an entity loader and
+            // a single-field identifier
+            if ($this->idAsValue && $this->entityLoader) {
+                $unorderedEntities = $this->entityLoader->getEntitiesByIds($this->idField, $values);
+                $entitiesByValue = array();
+                $entities = array();
+
+                // Maintain order and indices from the given $values
+                // An alternative approach to the following loop is to add the
+                // "INDEX BY" clause to the Doctrine query in the loader,
+                // but I'm not sure whether that's doable in a generic fashion.
+                foreach ($unorderedEntities as $entity) {
+                    $value = $this->fixValue($this->getSingleIdentifierValue($entity));
+                    $entitiesByValue[$value] = $entity;
+                }
+
+                foreach ($values as $i => $value) {
+                    if (isset($entitiesByValue[$value])) {
+                        $entities[$i] = $entitiesByValue[$value];
+                    }
+                }
+
+                return $entities;
+            }
+
+            $this->load();
+        }
+
+        return parent::getChoicesForValues($values);
+    }
+
+    /**
+     * Returns the values corresponding to the given entities.
+     *
+     * @return array
+     *
+     * @see ChoiceListInterface
+     */
+    public function getValuesForChoices(array $entities)
+    {
+        // Performance optimization
+        if (empty($entities)) {
+            return array();
+        }
+
+        if (!$this->loaded) {
+            // Optimize performance for single-field identifiers. We already
+            // know that the IDs are used as values
+
+            // Attention: This optimization does not check choices for existence
+            if ($this->idAsValue) {
+                $values = array();
+
+                foreach ($entities as $i => $entity) {
+                    if ($entity instanceof $this->class) {
+                        // Make sure to convert to the right format
+                        $values[$i] = $this->fixValue($this->getSingleIdentifierValue($entity));
+                    }
+                }
+
+                return $values;
+            }
+
+            $this->load();
+        }
+
+        return parent::getValuesForChoices($entities);
+    }
+
+    /**
+     * Returns the indices corresponding to the given entities.
+     *
+     * @param array $entities
+     *
+     * @return array
+     *
+     * @see ChoiceListInterface
+     * @deprecated since version 2.4, to be removed in 3.0.
+     */
+    public function getIndicesForChoices(array $entities)
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.4 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+        // Performance optimization
+        if (empty($entities)) {
+            return array();
+        }
+
+        if (!$this->loaded) {
+            // Optimize performance for single-field identifiers. We already
+            // know that the IDs are used as indices
+
+            // Attention: This optimization does not check choices for existence
+            if ($this->idAsIndex) {
+                $indices = array();
+
+                foreach ($entities as $i => $entity) {
+                    if ($entity instanceof $this->class) {
+                        // Make sure to convert to the right format
+                        $indices[$i] = $this->fixIndex($this->getSingleIdentifierValue($entity));
+                    }
+                }
+
+                return $indices;
+            }
+
+            $this->load();
+        }
+
+        return parent::getIndicesForChoices($entities);
+    }
+
+    /**
+     * Returns the entities corresponding to the given values.
+     *
+     * @param array $values
+     *
+     * @return array
+     *
+     * @see ChoiceListInterface
+     * @deprecated since version 2.4, to be removed in 3.0.
+     */
+    public function getIndicesForValues(array $values)
+    {
+        @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.4 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+        // Performance optimization
+        if (empty($values)) {
+            return array();
+        }
+
+        if (!$this->loaded) {
+            // Optimize performance for single-field identifiers.
+
+            // Attention: This optimization does not check values for existence
+            if ($this->idAsIndex && $this->idAsValue) {
+                return $this->fixIndices($values);
+            }
+
+            $this->load();
+        }
+
+        return parent::getIndicesForValues($values);
+    }
+
+    /**
+     * Creates a new unique index for this entity.
+     *
+     * If the entity has a single-field identifier, this identifier is used.
+     *
+     * Otherwise a new integer is generated.
+     *
+     * @param mixed $entity The choice to create an index for
+     *
+     * @return int|string a unique index containing only ASCII letters,
+     *                    digits and underscores
+     */
+    protected function createIndex($entity)
+    {
+        if ($this->idAsIndex) {
+            return $this->fixIndex($this->getSingleIdentifierValue($entity));
+        }
+
+        return parent::createIndex($entity);
+    }
+
+    /**
+     * Creates a new unique value for this entity.
+     *
+     * If the entity has a single-field identifier, this identifier is used.
+     *
+     * Otherwise a new integer is generated.
+     *
+     * @param mixed $entity The choice to create a value for
+     *
+     * @return int|string A unique value without character limitations
+     */
+    protected function createValue($entity)
+    {
+        if ($this->idAsValue) {
+            return (string) $this->getSingleIdentifierValue($entity);
+        }
+
+        return parent::createValue($entity);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function fixIndex($index)
+    {
+        $index = parent::fixIndex($index);
+
+        // If the ID is a single-field integer identifier, it is used as
+        // index. Replace any leading minus by underscore to make it a valid
+        // form name.
+        if ($this->idAsIndex && $index < 0) {
+            $index = strtr($index, '-', '_');
+        }
+
+        return $index;
+    }
+
+    /**
+     * Get identifier information for a class.
+     *
+     * @param ClassMetadata $classMetadata The entity metadata
+     *
+     * @return array Return an array with idAsIndex, idAsValue and identifier
+     */
+    private function getIdentifierInfoForClass(ClassMetadata $classMetadata)
+    {
+        $identifier = null;
+        $idAsIndex = false;
+        $idAsValue = false;
+
+        $identifiers = $classMetadata->getIdentifierFieldNames();
+
+        if (1 === \count($identifiers)) {
+            $identifier = $identifiers[0];
+
+            if (!$classMetadata->hasAssociation($identifier)) {
+                $idAsValue = true;
+
+                if (\in_array($classMetadata->getTypeOfField($identifier), array('integer', 'smallint', 'bigint'))) {
+                    $idAsIndex = true;
+                }
+            }
+        }
+
+        return array($idAsIndex, $idAsValue, $identifier);
+    }
+
+    /**
+     * Loads the list with entities.
+     *
+     * @throws StringCastException
+     */
+    private function load()
+    {
+        if ($this->entityLoader) {
+            $entities = $this->entityLoader->getEntities();
+        } else {
+            $entities = $this->em->getRepository($this->class)->findAll();
+        }
+
+        try {
+            // The second parameter $labels is ignored by ObjectChoiceList
+            parent::initialize($entities, array(), $this->preferredEntities);
+        } catch (StringCastException $e) {
+            throw new StringCastException(str_replace('argument $labelPath', 'option "property"', $e->getMessage()), null, $e);
+        }
+
+        $this->loaded = true;
+    }
+
+    /**
+     * Returns the first (and only) value of the identifier fields of an entity.
+     *
+     * Doctrine must know about this entity, that is, the entity must already
+     * be persisted or added to the identity map before. Otherwise an
+     * exception is thrown.
+     *
+     * @param object $entity The entity for which to get the identifier
+     *
+     * @return array The identifier values
+     *
+     * @throws RuntimeException If the entity does not exist in Doctrine's identity map
+     */
+    private function getSingleIdentifierValue($entity)
+    {
+        $value = current($this->getIdentifierValues($entity));
+
+        if ($this->idClassMetadata) {
+            $class = $this->idClassMetadata->getName();
+            if ($value instanceof $class) {
+                $value = current($this->idClassMetadata->getIdentifierValues($value));
+            }
+        }
+
+        return $value;
+    }
+
+    /**
+     * Returns the values of the identifier fields of an entity.
+     *
+     * Doctrine must know about this entity, that is, the entity must already
+     * be persisted or added to the identity map before. Otherwise an
+     * exception is thrown.
+     *
+     * @param object $entity The entity for which to get the identifier
+     *
+     * @return array The identifier values
+     *
+     * @throws RuntimeException If the entity does not exist in Doctrine's identity map
+     */
+    private function getIdentifierValues($entity)
+    {
+        if (!$this->em->contains($entity)) {
+            throw new RuntimeException('Entities passed to the choice field must be managed. Maybe persist them in the entity manager?');
+        }
+
+        $this->em->initializeObject($entity);
+
+        return $this->classMetadata->getIdentifierValues($entity);
+    }
+}

vendor/symfony/doctrine-bridge/Form/ChoiceList/EntityLoaderInterface.php

@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Doctrine\Form\ChoiceList;
+
+/**
+ * Custom loader for entities in the choice list.
+ *
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ */
+interface EntityLoaderInterface
+{
+    /**
+     * Returns an array of entities that are valid choices in the corresponding choice list.
+     *
+     * @return array The entities
+     */
+    public function getEntities();
+
+    /**
+     * Returns an array of entities matching the given identifiers.
+     *
+     * @param string $identifier The identifier field of the object. This method
+     *                           is not applicable for fields with multiple
+     *                           identifiers.
+     * @param array  $values     The values of the identifiers
+     *
+     * @return array The entities
+     */
+    public function getEntitiesByIds($identifier, array $values);
+}

vendor/symfony/doctrine-bridge/Form/ChoiceList/IdReader.php

@@ -0,0 +1,123 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Doctrine\Form\ChoiceList;
+
+use Doctrine\Common\Persistence\Mapping\ClassMetadata;
+use Doctrine\Common\Persistence\ObjectManager;
+use Symfony\Component\Form\Exception\RuntimeException;
+
+/**
+ * A utility for reading object IDs.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @internal this class is meant for internal use only
+ */
+class IdReader
+{
+    private $om;
+    private $classMetadata;
+    private $singleId;
+    private $intId;
+    private $idField;
+
+    /**
+     * @var IdReader|null
+     */
+    private $associationIdReader;
+
+    public function __construct(ObjectManager $om, ClassMetadata $classMetadata)
+    {
+        $ids = $classMetadata->getIdentifierFieldNames();
+        $idType = $classMetadata->getTypeOfField(current($ids));
+
+        $this->om = $om;
+        $this->classMetadata = $classMetadata;
+        $this->singleId = 1 === \count($ids);
+        $this->intId = $this->singleId && \in_array($idType, array('integer', 'smallint', 'bigint'));
+        $this->idField = current($ids);
+
+        // single field association are resolved, since the schema column could be an int
+        if ($this->singleId && $classMetadata->hasAssociation($this->idField)) {
+            $this->associationIdReader = new self($om, $om->getClassMetadata(
+                $classMetadata->getAssociationTargetClass($this->idField)
+            ));
+
+            $this->singleId = $this->associationIdReader->isSingleId();
+            $this->intId = $this->associationIdReader->isIntId();
+        }
+    }
+
+    /**
+     * Returns whether the class has a single-column ID.
+     *
+     * @return bool returns `true` if the class has a single-column ID and
+     *              `false` otherwise
+     */
+    public function isSingleId()
+    {
+        return $this->singleId;
+    }
+
+    /**
+     * Returns whether the class has a single-column integer ID.
+     *
+     * @return bool returns `true` if the class has a single-column integer ID
+     *              and `false` otherwise
+     */
+    public function isIntId()
+    {
+        return $this->intId;
+    }
+
+    /**
+     * Returns the ID value for an object.
+     *
+     * This method assumes that the object has a single-column ID.
+     *
+     * @param object $object The object
+     *
+     * @return mixed The ID value
+     */
+    public function getIdValue($object)
+    {
+        if (!$object) {
+            return;
+        }
+
+        if (!$this->om->contains($object)) {
+            throw new RuntimeException(sprintf('Entity of type "%s" passed to the choice field must be managed. Maybe you forget to persist it in the entity manager?', \get_class($object)));
+        }
+
+        $this->om->initializeObject($object);
+
+        $idValue = current($this->classMetadata->getIdentifierValues($object));
+
+        if ($this->associationIdReader) {
+            $idValue = $this->associationIdReader->getIdValue($idValue);
+        }
+
+        return $idValue;
+    }
+
+    /**
+     * Returns the name of the ID field.
+     *
+     * This method assumes that the object has a single-column ID.
+     *
+     * @return string The name of the ID field
+     */
+    public function getIdField()
+    {
+        return $this->idField;
+    }
+}

vendor/symfony/doctrine-bridge/Form/ChoiceList/ORMQueryBuilderLoader.php

@@ -0,0 +1,128 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bridge\Doctrine\Form\ChoiceList;
+
+use Doctrine\Common\Persistence\ObjectManager;
+use Doctrine\DBAL\Connection;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\Exception\UnexpectedTypeException;
+
+/**
+ * Loads entities using a {@link QueryBuilder} instance.
+ *
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class ORMQueryBuilderLoader implements EntityLoaderInterface
+{
+    /**
+     * Contains the query builder that builds the query for fetching the
+     * entities.
+     *
+     * This property should only be accessed through queryBuilder.
+     *
+     * @var QueryBuilder
+     */
+    private $queryBuilder;
+
+    /**
+     * Construct an ORM Query Builder Loader.
+     *
+     * @param QueryBuilder|\Closure $queryBuilder The query builder or a closure
+     *                                            for creating the query builder.
+     *                                            Passing a closure is
+     *                                            deprecated and will not be
+     *                                            supported anymore as of
+     *                                            Symfony 3.0.
+     * @param ObjectManager         $manager      Deprecated
+     * @param string                $class        Deprecated
+     *
+     * @throws UnexpectedTypeException
+     */
+    public function __construct($queryBuilder, $manager = null, $class = null)
+    {
+        // If a query builder was passed, it must be a closure or QueryBuilder
+        // instance
+        if (!($queryBuilder instanceof QueryBuilder || $queryBuilder instanceof \Closure)) {
+            throw new UnexpectedTypeException($queryBuilder, 'Doctrine\ORM\QueryBuilder or \Closure');
+        }
+
+        if ($queryBuilder instanceof \Closure) {
+            @trigger_error('Passing a QueryBuilder closure to '.__CLASS__.'::__construct() is deprecated since Symfony 2.7 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+            if (!$manager instanceof ObjectManager) {
+                throw new UnexpectedTypeException($manager, 'Doctrine\Common\Persistence\ObjectManager');
+            }
+
+            @trigger_error('Passing an EntityManager to '.__CLASS__.'::__construct() is deprecated since Symfony 2.7 and will be removed in 3.0.', E_USER_DEPRECATED);
+            @trigger_error('Passing a class to '.__CLASS__.'::__construct() is deprecated since Symfony 2.7 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+            $queryBuilder = $queryBuilder($manager->getRepository($class));
+
+            if (!$queryBuilder instanceof QueryBuilder) {
+                throw new UnexpectedTypeException($queryBuilder, 'Doctrine\ORM\QueryBuilder');
+            }
+        }
+
+        $this->queryBuilder = $queryBuilder;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getEntities()
+    {
+        return $this->queryBuilder->getQuery()->execute();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getEntitiesByIds($identifier, array $values)
+    {
+        $qb = clone $this->queryBuilder;
+        $alias = current($qb->getRootAliases());
+        $parameter = 'ORMQueryBuilderLoader_getEntitiesByIds_'.$identifier;
+        $parameter = str_replace('.', '_', $parameter);
+        $where = $qb->expr()->in($alias.'.'.$identifier, ':'.$parameter);
+
+        // Guess type
+        $entity = current($qb->getRootEntities());
+        $metadata = $qb->getEntityManager()->getClassMetadata($entity);
+        if (\in_array($metadata->getTypeOfField($identifier), array('integer', 'bigint', 'smallint'))) {
+            $parameterType = Connection::PARAM_INT_ARRAY;
+
+            // Filter out non-integer values (e.g. ""). If we don't, some
+            // databases such as PostgreSQL fail.
+            $values = array_values(array_filter($values, function ($v) {
+                return (string) $v === (string) (int) $v || ctype_digit($v);
+            }));
+        } elseif (\in_array($metadata->getTypeOfField($identifier), array('uuid', 'guid'))) {
+            $parameterType = Connection::PARAM_STR_ARRAY;
+
+            // Like above, but we just filter out empty strings.
+            $values = array_values(array_filter($values, function ($v) {
+                return '' !== (string) $v;
+            }));
+        } else {
+            $parameterType = Connection::PARAM_STR_ARRAY;
+        }
+        if (!$values) {
+            return array();
+        }
+
+        return $qb->andWhere($where)
+                  ->getQuery()
+                  ->setParameter($parameter, $values, $parameterType)
+                  ->getResult();
+    }
+}