Zend 2 + Doctrine 实体请求
Zend 2 + Doctrine Entity request
我在使用学说时遇到问题。当我尝试获取特定实体时，无法检索结果。
我有这些实体：
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Courses
*
* @ORM\Table(name="courses")
* @ORM\Entity
*/
class Courses
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="name", type="string", length=64, nullable=false)
*/
private $name;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
*
* @return Courses
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
}
和
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Levels
*
* @ORM\Table(name="levels")
* @ORM\Entity
*/
class Levels
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="name", type="string", length=64, nullable=false)
*/
private $name;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
*
* @return Levels
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
}
和
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Places
*
* @ORM\Table(name="places")
* @ORM\Entity
*/
class Places
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="name", type="string", length=64, nullable=false)
*/
private $name;
/**
* @var string
*
* @ORM\Column(name="address", type="text", length=65535, nullable=false)
*/
private $address;
/**
* @var float
*
* @ORM\Column(name="latitude", type="float", precision=10, scale=0, nullable=false)
*/
private $latitude;
/**
* @var float
*
* @ORM\Column(name="longitude", type="float", precision=10, scale=0, nullable=false)
*/
private $longitude;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
*
* @return Places
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Set address
*
* @param string $address
*
* @return Places
*/
public function setAddress($address)
{
$this->address = $address;
return $this;
}
/**
* Get address
*
* @return string
*/
public function getAddress()
{
return $this->address;
}
/**
* Set latitude
*
* @param float $latitude
*
* @return Places
*/
public function setLatitude($latitude)
{
$this->latitude = $latitude;
return $this;
}
/**
* Get latitude
*
* @return float
*/
public function getLatitude()
{
return $this->latitude;
}
/**
* Set longitude
*
* @param float $longitude
*
* @return Places
*/
public function setLongitude($longitude)
{
$this->longitude = $longitude;
return $this;
}
/**
* Get longitude
*
* @return float
*/
public function getLongitude()
{
return $this->longitude;
}
}
和
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* TimeSlot
*
* @ORM\Table(name="time_slot")
* @ORM\Entity
*/
class TimeSlot
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var \DateTime
*
* @ORM\Column(name="start", type="time", nullable=false)
*/
private $start;
/**
* @var \DateTime
*
* @ORM\Column(name="end", type="time", nullable=false)
*/
private $end;
/**
* @var integer
*
* @ORM\Column(name="day", type="integer", nullable=false)
*/
private $day;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set start
*
* @param \DateTime $start
*
* @return TimeSlot
*/
public function setStart($start)
{
$this->start = $start;
return $this;
}
/**
* Get start
*
* @return \DateTime
*/
public function getStart()
{
return $this->start;
}
/**
* Set end
*
* @param \DateTime $end
*
* @return TimeSlot
*/
public function setEnd($end)
{
$this->end = $end;
return $this;
}
/**
* Get end
*
* @return \DateTime
*/
public function getEnd()
{
return $this->end;
}
/**
* Set day
*
* @param integer $day
*
* @return TimeSlot
*/
public function setDay($day)
{
$this->day = $day;
return $this;
}
/**
* Get day
*
* @return integer
*/
public function getDay()
{
return $this->day;
}
}
这些实体使用 table 连接起来。此 table 还包含一个 id，因为一行可以被另一个 table.
引用
这是最后一个实体：
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* CoursesLevelsPlaces
*
* @ORM\Table(name="courses_levels_places", uniqueConstraints={@ORM\UniqueConstraint(name="id_course", columns={"id_course", "id_level", "id_place", "id_time_slot"})}, indexes={@ORM\Index(name="courses", columns={"id_course"}), @ORM\Index(name="levels", columns={"id_level"}), @ORM\Index(name="places", columns={"id_place"}), @ORM\Index(name="time_slot", columns={"id_time_slot"})})
* @ORM\Entity
*/
class CoursesLevelsPlaces
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var \TDS\Entity\Courses
*
* @ORM\ManyToOne(targetEntity="TDS\Entity\Courses")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id_course", referencedColumnName="id")
* })
*/
private $idCourse;
/**
* @var \TDS\Entity\Levels
*
* @ORM\ManyToOne(targetEntity="TDS\Entity\Levels")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id_level", referencedColumnName="id")
* })
*/
private $idLevel;
/**
* @var \TDS\Entity\Places
*
* @ORM\ManyToOne(targetEntity="TDS\Entity\Places")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id_place", referencedColumnName="id")
* })
*/
private $idPlace;
/**
* @var \TDS\Entity\TimeSlot
*
* @ORM\ManyToOne(targetEntity="TDS\Entity\TimeSlot")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id_time_slot", referencedColumnName="id")
* })
*/
private $idTimeSlot;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set idCourse
*
* @param \TDS\Entity\Courses $idCourse
*
* @return CoursesLevelsPlaces
*/
public function setIdCourse(\TDS\Entity\Courses $idCourse = null)
{
$this->idCourse = $idCourse;
return $this;
}
/**
* Get idCourse
*
* @return \TDS\Entity\Courses
*/
public function getIdCourse()
{
return $this->idCourse;
}
/**
* Set idLevel
*
* @param \TDS\Entity\Levels $idLevel
*
* @return CoursesLevelsPlaces
*/
public function setIdLevel(\TDS\Entity\Levels $idLevel = null)
{
$this->idLevel = $idLevel;
return $this;
}
/**
* Get idLevel
*
* @return \TDS\Entity\Levels
*/
public function getIdLevel()
{
return $this->idLevel;
}
/**
* Set idPlace
*
* @param \TDS\Entity\Places $idPlace
*
* @return CoursesLevelsPlaces
*/
public function setIdPlace(\TDS\Entity\Places $idPlace = null)
{
$this->idPlace = $idPlace;
return $this;
}
/**
* Get idPlace
*
* @return \TDS\Entity\Places
*/
public function getIdPlace()
{
return $this->idPlace;
}
/**
* Set idTimeSlot
*
* @param \TDS\Entity\TimeSlot $idTimeSlot
*
* @return CoursesLevelsPlaces
*/
public function setIdTimeSlot(\TDS\Entity\TimeSlot $idTimeSlot = null)
{
$this->idTimeSlot = $idTimeSlot;
return $this;
}
/**
* Get idTimeSlot
*
* @return \TDS\Entity\TimeSlot
*/
public function getIdTimeSlot()
{
return $this->idTimeSlot;
}
}
当我进行查询以获取所有 CoursesLevelsPlaces 时，请求运行了很长时间然后中断。尝试生成 print_r 结果：
Array ( [0] => TDS\Entity\CoursesLevelsPlaces Object ( [id:TDS\Entity\CoursesLevelsPlaces:private] => 1 [idCourse:TDS\Entity\CoursesLevelsPlaces:private] => DoctrineORMModule\Proxy\__CG__\TDS\Entity\Courses Object ( [__initializer__] => Closure Object ( [static] => Array ( [entityPersister] => Doctrine\ORM\Persisters\Entity\BasicEntityPersister Object ( [class:protected] => Doctrine\ORM\Mapping\ClassMetadata Object ( [name] => TDS\Entity\Courses [namespace] => TDS\Entity [rootEntityName] => TDS\Entity\Courses [customGeneratorDefinition] => [customRepositoryClassName] => [isMappedSuperclass] => [isEmbeddedClass] => [parentClasses] => Array ( ) [subClasses] => Array ( ) [embeddedClasses] => Array ( ) [namedQueries] => Array ( ) [namedNativeQueries] => Array ( ) [sqlResultSetMappings] => Array ( ) [identifier] => Array ( [0] => id ) [inheritanceType] => 1 [generatorType] => 4 [fieldMappings] => Array ( [id] => Array ( [fieldName] => id [type] => integer [scale] => 0 [length] => [unique] => [nullable] => [precision] => 0 [columnName] => id [id] => 1 ) [name] => Array ( [fieldName] => name [type] => string [scale] => 0 [length] => 64 [unique] => [nullable] => [precision] => 0 [columnName] => name ) ) [fieldNames] => Array ( [id] => id [name] => name ) [columnNames] => Array ( [id] => id [name] => name ) [discriminatorValue] => [discriminatorMap] => Array ( ) [discriminatorColumn] => [table] => Array ( [name] => courses ) [lifecycleCallbacks] => Array ( ) [entityListeners] => Array ( ) [associationMappings] => Array ( ) [isIdentifierComposite] => [containsForeignIdentifier] => [idGenerator] => Doctrine\ORM\Id\IdentityGenerator Object ( [sequenceName:Doctrine\ORM\Id\IdentityGenerator:private] => ) [sequenceGeneratorDefinition] => [tableGeneratorDefinition] => [changeTrackingPolicy] => 1 [isVersioned] => [versionField] => [cache] => [reflClass] => ReflectionClass Object ( [name] => TDS\Entity\Courses ) [isReadOnly] => [namingStrategy:protected] => Doctrine\ORM\Mapping\DefaultNamingStrategy Object ( ) [reflFields] => Array ( [id] => ReflectionProperty Object ( [name] => id [class] => TDS\Entity\Courses ) [name] => ReflectionProperty Object ( [name] => name [class] => TDS\Entity\Courses ) ) [instantiator:Doctrine\ORM\Mapping\ClassMetadataInfo:private] => Doctrine\Instantiator\Instantiator Object ( ) ) [conn:protected] => Doctrine\DBAL\Connection Object ( [_conn:protected] => Doctrine\DBAL\Driver\PDOConnection Object ( ) [_config:protected] => Doctrine\ORM\Configuration Object ( [_attributes:protected] => Array ( [autoGenerateProxyClasses] => 1 [proxyDir] => data/DoctrineORMModule/Proxy [proxyNamespace] => DoctrineORMModule\Proxy [entityNamespaces] => Array ( ) [customStringFunctions] => Array ( [unix_timestamp] => Swing\Utils\UnixTimestamp ) [classMetadataFactoryName] => Doctrine\ORM\Mapping\ClassMetadataFactory [metadataCacheImpl] => Doctrine\Common\Cache\ArrayCache Object ( [data:Doctrine\Common\Cache\ArrayCache:private] => Array ( [DoctrineNamespaceCacheKey[DoctrineModule]] => 1 [DoctrineModule[TDS\Entity\Courses@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Table] => Doctrine\ORM\Mapping\Table Object ( [name] => courses [schema] => [indexes] => [uniqueConstraints] => [options] => Array ( ) ) [Doctrine\ORM\Mapping\Entity] => Doctrine\ORM\Mapping\Entity Object ( [repositoryClass] => [readOnly] => ) ) [DoctrineModule[TDS\Entity\Courses$id@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Column] => Doctrine\ORM\Mapping\Column Object ( [name] => id [type] => integer [length] => [precision] => 0 [scale] => 0 [unique] => [nullable] => [options] => Array ( ) [columnDefinition] => ) [Doctrine\ORM\Mapping\Id] => Doctrine\ORM\Mapping\Id Object ( ) [Doctrine\ORM\Mapping\GeneratedValue] => Doctrine\ORM\Mapping\GeneratedValue Object ( [strategy] => IDENTITY ) ) [DoctrineModule[TDS\Entity\Courses$name@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Column] => Doctrine\ORM\Mapping\Column Object ( [name] => name [type] => string [length] => 64 [precision] => 0 [scale] => 0 [unique] => [nullable] => [options] => Array ( ) [columnDefinition] => ) ) [DoctrineModule[TDS\Entity\Courses$CLASSMETADATA][1]] => Doctrine\ORM\Mapping\ClassMetadata Object ( [name] => TDS\Entity\Courses [namespace] => TDS\Entity [rootEntityName] => TDS\Entity\Courses [customGeneratorDefinition] => [customRepositoryClassName] => [isMappedSuperclass] => [isEmbeddedClass] => [parentClasses] => Array ( ) [subClasses] => Array ( ) [embeddedClasses] => Array ( ) [namedQueries] => Array ( ) [namedNativeQueries] => Array ( ) [sqlResultSetMappings] => Array ( ) [identifier] => Array ( [0] => id ) [inheritanceType] => 1 [generatorType] => 4 [fieldMappings] => Array ( [id] => Array ( [fieldName] => id [type] => integer [scale] => 0 [length] => [unique] => [nullable] => [precision] => 0 [columnName] => id [id] => 1 ) [name] => Array ( [fieldName] => name [type] => string [scale] => 0 [length] => 64 [unique] => [nullable] => [precision] => 0 [columnName] => name ) ) [fieldNames] => Array ( [id] => id [name] => name ) [columnNames] => Array ( [id] => id [name] => name ) [discriminatorValue] => [discriminatorMap] => Array ( ) [discriminatorColumn] => [table] => Array ( [name] => courses ) [lifecycleCallbacks] => Array ( ) [entityListeners] => Array ( ) [associationMappings] => Array ( ) [isIdentifierComposite] => [containsForeignIdentifier] => [idGenerator] => Doctrine\ORM\Id\IdentityGenerator Object ( [sequenceName:Doctrine\ORM\Id\IdentityGenerator:private] => ) [sequenceGeneratorDefinition] => [tableGeneratorDefinition] => [changeTrackingPolicy] => 1 [isVersioned] => [versionField] => [cache] => [reflClass] => ReflectionClass Object ( [name] => TDS\Entity\Courses ) [isReadOnly] => [namingStrategy:protected] => Doctrine\ORM\Mapping\DefaultNamingStrategy Object ( ) [reflFields] => Array ( [id] => ReflectionProperty Object ( [name] => id [class] => TDS\Entity\Courses ) [name] => ReflectionProperty Object ( [name] => name [class] => TDS\Entity\Courses ) ) [instantiator:Doctrine\ORM\Mapping\ClassMetadataInfo:private] => Doctrine\Instantiator\Instantiator Object ( ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Table] => Doctrine\ORM\Mapping\Table Object ( [name] => courses_levels_places [schema] => [indexes] => Array ( [0] => Doctrine\ORM\Mapping\Index Object ( [name] => courses [columns] => Array ( [0] => id_course ) [flags] => [options] => ) [1] => Doctrine\ORM\Mapping\Index Object ( [name] => levels [columns] => Array ( [0] => id_level ) [flags] => [options] => ) [2] => Doctrine\ORM\Mapping\Index Object ( [name] => places [columns] => Array ( [0] => id_place ) [flags] => [options] => ) [3] => Doctrine\ORM\Mapping\Index Object ( [name] => time_slot [columns] => Array ( [0] => id_time_slot ) [flags] => [options] => ) ) [uniqueConstraints] => [options] => Array ( ) ) [Doctrine\ORM\Mapping\Entity] => Doctrine\ORM\Mapping\Entity Object ( [repositoryClass] => [readOnly] => ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$id@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Column] => Doctrine\ORM\Mapping\Column Object ( [name] => id [type] => integer [length] => [precision] => 0 [scale] => 0 [unique] => [nullable] => [options] => Array ( ) [columnDefinition] => ) [Doctrine\ORM\Mapping\Id] => Doctrine\ORM\Mapping\Id Object ( ) [Doctrine\ORM\Mapping\GeneratedValue] => Doctrine\ORM\Mapping\GeneratedValue Object ( [strategy] => IDENTITY ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$idCourse@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\ManyToOne] => Doctrine\ORM\Mapping\ManyToOne Object ( [targetEntity] => TDS\Entity\Courses [cascade] => [fetch] => LAZY [inversedBy] => ) [Doctrine\ORM\Mapping\JoinColumns] => Doctrine\ORM\Mapping\JoinColumns Object ( [value] => Array ( [0] => Doctrine\ORM\Mapping\JoinColumn Object ( [name] => id_course [referencedColumnName] => id [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [fieldName] => ) ) ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$idLevel@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\ManyToOne] => Doctrine\ORM\Mapping\ManyToOne Object ( [targetEntity] => TDS\Entity\Levels [cascade] => [fetch] => LAZY [inversedBy] => ) [Doctrine\ORM\Mapping\JoinColumns] => Doctrine\ORM\Mapping\JoinColumns Object ( [value] => Array ( [0] => Doctrine\ORM\Mapping\JoinColumn Object ( [name] => id_level [referencedColumnName] => id [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [fieldName] => ) ) ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$idPlace@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\ManyToOne] => Doctrine\ORM\Mapping\ManyToOne Object ( [targetEntity] => TDS\Entity\Places [cascade] => [fetch] => LAZY [inversedBy] => ) [Doctrine\ORM\Mapping\JoinColumns] => Doctrine\ORM\Mapping\JoinColumns Object ( [value] => Array ( [0] => Doctrine\ORM\Mapping\JoinColumn Object ( [name] => id_place [referencedColumnName] => id [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [fieldName] => ) ) ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$idTimeSlot@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\ManyToOne] => Doctrine\ORM\Mapping\ManyToOne Object ( [targetEntity] => TDS\Entity\TimeSlot [cascade] => [fetch] => LAZY [inversedBy] => ) [Doctrine\ORM\Mapping\JoinColumns] => Doctrine\ORM\Mapping\JoinColumns Object ( [value] => Array ( [0] => Doctrine\ORM\Mapping\JoinColumn Object ( [name] => id_time_slot [referencedColumnName] => id [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [fieldName] => ) ) ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$CLASSMETADATA][1]] => Doctrine\ORM\Mapping\ClassMetadata Object ( [name] => TDS\Entity\CoursesLevelsPlaces [namespace] => TDS\Entity [rootEntityName] => TDS\Entity\CoursesLevelsPlaces [customGeneratorDefinition] => [customRepositoryClassName] => [isMappedSuperclass] => [isEmbeddedClass] => [parentClasses] => Array ( ) [subClasses] => Array ( ) [embeddedClasses] => Array ( ) [namedQueries] => Array ( ) [namedNativeQueries] => Array ( ) [sqlResultSetMappings] => Array ( ) [identifier] => Array ( [0] => id ) [inheritanceType] => 1 [generatorType] => 4 [fieldMappings] => Array ( [id] => Array ( [fieldName] => id [type] => integer [scale] => 0 [length] => [unique] => [nullable] => [precision] => 0 [columnName] => id [id] => 1 ) ) [fieldNames] => Array ( [id] => id ) [columnNames] => Array ( [id] => id ) [discriminatorValue] => [discriminatorMap] => Array ( ) [discriminatorColumn] => [table] => Array ( [name] => courses_levels_places [indexes] => Array ( [courses] => Array ( [columns] => Array ( [0] => id_course ) ) [levels] => Array ( [columns] => Array ( [0] => id_level ) ) [places] => Array ( [columns] => Array ( [0] => id_place ) ) [time_slot] => Array ( [columns] => Array ( [0] => id_time_slot ) ) ) ) [lifecycleCallbacks] => Array ( ) [entityListeners] => Array ( ) [associationMappings] => Array ( [idCourse] => Array ( [fieldName] => idCourse [joinColumns] => Array ( [0] => Array ( [name] => id_course [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [referencedColumnName] => id ) ) [cascade] => Array ( ) [inversedBy] => [targetEntity] => TDS\Entity\Courses [fetch] => 2 [type] => 2 [mappedBy] => [isOwningSide] => 1 [sourceEntity] => TDS\Entity\CoursesLevelsPlaces [isCascadeRemove] => [isCascadePersist] => [isCascadeRefresh] => [isCascadeMerge] => [isCascadeDetach] => [sourceToTargetKeyColumns] => Array ( [id_course] => id ) [joinColumnFieldNames] => Array ( [id_course] => id_course ) [targetToSourceKeyColumns] => Array ( [id] => id_course ) [orphanRemoval] => ) [idLevel] => Array ( [fieldName] => idLevel [joinColumns] => Array ( [0] => Array ( [name] => id_level [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [referencedColumnName] => id ) ) [cascade] => Array ( ) [inversedBy] => [targetEntity] => TDS\Entity\Levels [fetch] => 2 [type] => 2 [mappedBy] => [isOwningSide] => 1 [sourceEntity] => TDS\Entity\CoursesLevelsPlaces [isCascadeRemove] => [isCascadePersist] => [isCascadeRefresh] => [isCascadeMerge] => [isCascadeDetach] => [sourceToTargetKeyColumns] => Array ( [id_level] => id ) [joinColumnFieldNames] => Array ( [id_level] => id_level ) [targetToSourceKeyColumns] => Array ( [id] => id_level ) [orphanRemoval] => ) [idPlace] => Array ( [fieldName] => idPlace [joinColumns] => Array ( [0] => Array ( [name] => id_place [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [referencedColumnName] => id ) ) [cascade] => Array ( ) [inversedBy] => [targetEntity] => TDS\Entity\Places [fetch] => 2 [type] => 2 [mappedBy] => [isOwningSide] => 1 [sourceEntity] => TDS\Entity\CoursesLevelsPlaces [isCascadeRemove] => [isCascadePersist] => [isCascadeRefresh] => [isCascadeMerge] => [isCascadeDetach] => [sourceToTargetKeyColumns] => Array ( [id_place] => id ) [joinColumnFieldNames] => Array ( [id_place] => id_place )
这是我提出请求的方式：
$qb = $this->getEm()->createQueryBuilder();
$qb->select('clp')->from('TDS\Entity\CoursesLevelsPlaces', 'clp');
$list = $qb->getQuery()->getResult();
问题是我无法检索我的实体。例如，如果我在 Courses 上发出请求，结果会正确显示。
每个 CoursesLevelsPlaces 行都是唯一的，并且与其他实体具有一对一的关系。
作为参考，我从我的数据库模式中生成了这些实体（反向原则）
你知道我为什么会得到这个结果吗？
谢谢
你不应该 print_r 或 var_dump 完整的学说 2 实体，因为所有的元数据等也将被打印出来。这将导致内存问题，并且输出对于您的浏览器来说太多了。
你有几个选择
只需遍历您的结果并使用 getter 检索数据。
foreach ($list as $entity) {
echo $entity->getId() . PHP_EOL;
}
使用 doctrine 中的调试工具。
foreach ($list as $entity) {
Doctrine\Common\Util\Debug::dump($entity);
}
使用调试器 (xdebug) 并在您的 IDE 中放置一个断点并观察实体内容
我在使用学说时遇到问题。当我尝试获取特定实体时，无法检索结果。 我有这些实体：
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Courses
*
* @ORM\Table(name="courses")
* @ORM\Entity
*/
class Courses
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="name", type="string", length=64, nullable=false)
*/
private $name;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
*
* @return Courses
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
}
和
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Levels
*
* @ORM\Table(name="levels")
* @ORM\Entity
*/
class Levels
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="name", type="string", length=64, nullable=false)
*/
private $name;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
*
* @return Levels
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
}
和
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Places
*
* @ORM\Table(name="places")
* @ORM\Entity
*/
class Places
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="name", type="string", length=64, nullable=false)
*/
private $name;
/**
* @var string
*
* @ORM\Column(name="address", type="text", length=65535, nullable=false)
*/
private $address;
/**
* @var float
*
* @ORM\Column(name="latitude", type="float", precision=10, scale=0, nullable=false)
*/
private $latitude;
/**
* @var float
*
* @ORM\Column(name="longitude", type="float", precision=10, scale=0, nullable=false)
*/
private $longitude;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
*
* @return Places
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Set address
*
* @param string $address
*
* @return Places
*/
public function setAddress($address)
{
$this->address = $address;
return $this;
}
/**
* Get address
*
* @return string
*/
public function getAddress()
{
return $this->address;
}
/**
* Set latitude
*
* @param float $latitude
*
* @return Places
*/
public function setLatitude($latitude)
{
$this->latitude = $latitude;
return $this;
}
/**
* Get latitude
*
* @return float
*/
public function getLatitude()
{
return $this->latitude;
}
/**
* Set longitude
*
* @param float $longitude
*
* @return Places
*/
public function setLongitude($longitude)
{
$this->longitude = $longitude;
return $this;
}
/**
* Get longitude
*
* @return float
*/
public function getLongitude()
{
return $this->longitude;
}
}
和
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* TimeSlot
*
* @ORM\Table(name="time_slot")
* @ORM\Entity
*/
class TimeSlot
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var \DateTime
*
* @ORM\Column(name="start", type="time", nullable=false)
*/
private $start;
/**
* @var \DateTime
*
* @ORM\Column(name="end", type="time", nullable=false)
*/
private $end;
/**
* @var integer
*
* @ORM\Column(name="day", type="integer", nullable=false)
*/
private $day;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set start
*
* @param \DateTime $start
*
* @return TimeSlot
*/
public function setStart($start)
{
$this->start = $start;
return $this;
}
/**
* Get start
*
* @return \DateTime
*/
public function getStart()
{
return $this->start;
}
/**
* Set end
*
* @param \DateTime $end
*
* @return TimeSlot
*/
public function setEnd($end)
{
$this->end = $end;
return $this;
}
/**
* Get end
*
* @return \DateTime
*/
public function getEnd()
{
return $this->end;
}
/**
* Set day
*
* @param integer $day
*
* @return TimeSlot
*/
public function setDay($day)
{
$this->day = $day;
return $this;
}
/**
* Get day
*
* @return integer
*/
public function getDay()
{
return $this->day;
}
}
这些实体使用 table 连接起来。此 table 还包含一个 id，因为一行可以被另一个 table.
引用这是最后一个实体：
<?php
namespace TDS\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* CoursesLevelsPlaces
*
* @ORM\Table(name="courses_levels_places", uniqueConstraints={@ORM\UniqueConstraint(name="id_course", columns={"id_course", "id_level", "id_place", "id_time_slot"})}, indexes={@ORM\Index(name="courses", columns={"id_course"}), @ORM\Index(name="levels", columns={"id_level"}), @ORM\Index(name="places", columns={"id_place"}), @ORM\Index(name="time_slot", columns={"id_time_slot"})})
* @ORM\Entity
*/
class CoursesLevelsPlaces
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer", nullable=false)
* @ORM\Id
* @ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* @var \TDS\Entity\Courses
*
* @ORM\ManyToOne(targetEntity="TDS\Entity\Courses")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id_course", referencedColumnName="id")
* })
*/
private $idCourse;
/**
* @var \TDS\Entity\Levels
*
* @ORM\ManyToOne(targetEntity="TDS\Entity\Levels")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id_level", referencedColumnName="id")
* })
*/
private $idLevel;
/**
* @var \TDS\Entity\Places
*
* @ORM\ManyToOne(targetEntity="TDS\Entity\Places")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id_place", referencedColumnName="id")
* })
*/
private $idPlace;
/**
* @var \TDS\Entity\TimeSlot
*
* @ORM\ManyToOne(targetEntity="TDS\Entity\TimeSlot")
* @ORM\JoinColumns({
* @ORM\JoinColumn(name="id_time_slot", referencedColumnName="id")
* })
*/
private $idTimeSlot;
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set idCourse
*
* @param \TDS\Entity\Courses $idCourse
*
* @return CoursesLevelsPlaces
*/
public function setIdCourse(\TDS\Entity\Courses $idCourse = null)
{
$this->idCourse = $idCourse;
return $this;
}
/**
* Get idCourse
*
* @return \TDS\Entity\Courses
*/
public function getIdCourse()
{
return $this->idCourse;
}
/**
* Set idLevel
*
* @param \TDS\Entity\Levels $idLevel
*
* @return CoursesLevelsPlaces
*/
public function setIdLevel(\TDS\Entity\Levels $idLevel = null)
{
$this->idLevel = $idLevel;
return $this;
}
/**
* Get idLevel
*
* @return \TDS\Entity\Levels
*/
public function getIdLevel()
{
return $this->idLevel;
}
/**
* Set idPlace
*
* @param \TDS\Entity\Places $idPlace
*
* @return CoursesLevelsPlaces
*/
public function setIdPlace(\TDS\Entity\Places $idPlace = null)
{
$this->idPlace = $idPlace;
return $this;
}
/**
* Get idPlace
*
* @return \TDS\Entity\Places
*/
public function getIdPlace()
{
return $this->idPlace;
}
/**
* Set idTimeSlot
*
* @param \TDS\Entity\TimeSlot $idTimeSlot
*
* @return CoursesLevelsPlaces
*/
public function setIdTimeSlot(\TDS\Entity\TimeSlot $idTimeSlot = null)
{
$this->idTimeSlot = $idTimeSlot;
return $this;
}
/**
* Get idTimeSlot
*
* @return \TDS\Entity\TimeSlot
*/
public function getIdTimeSlot()
{
return $this->idTimeSlot;
}
}
当我进行查询以获取所有 CoursesLevelsPlaces 时，请求运行了很长时间然后中断。尝试生成 print_r 结果：
Array ( [0] => TDS\Entity\CoursesLevelsPlaces Object ( [id:TDS\Entity\CoursesLevelsPlaces:private] => 1 [idCourse:TDS\Entity\CoursesLevelsPlaces:private] => DoctrineORMModule\Proxy\__CG__\TDS\Entity\Courses Object ( [__initializer__] => Closure Object ( [static] => Array ( [entityPersister] => Doctrine\ORM\Persisters\Entity\BasicEntityPersister Object ( [class:protected] => Doctrine\ORM\Mapping\ClassMetadata Object ( [name] => TDS\Entity\Courses [namespace] => TDS\Entity [rootEntityName] => TDS\Entity\Courses [customGeneratorDefinition] => [customRepositoryClassName] => [isMappedSuperclass] => [isEmbeddedClass] => [parentClasses] => Array ( ) [subClasses] => Array ( ) [embeddedClasses] => Array ( ) [namedQueries] => Array ( ) [namedNativeQueries] => Array ( ) [sqlResultSetMappings] => Array ( ) [identifier] => Array ( [0] => id ) [inheritanceType] => 1 [generatorType] => 4 [fieldMappings] => Array ( [id] => Array ( [fieldName] => id [type] => integer [scale] => 0 [length] => [unique] => [nullable] => [precision] => 0 [columnName] => id [id] => 1 ) [name] => Array ( [fieldName] => name [type] => string [scale] => 0 [length] => 64 [unique] => [nullable] => [precision] => 0 [columnName] => name ) ) [fieldNames] => Array ( [id] => id [name] => name ) [columnNames] => Array ( [id] => id [name] => name ) [discriminatorValue] => [discriminatorMap] => Array ( ) [discriminatorColumn] => [table] => Array ( [name] => courses ) [lifecycleCallbacks] => Array ( ) [entityListeners] => Array ( ) [associationMappings] => Array ( ) [isIdentifierComposite] => [containsForeignIdentifier] => [idGenerator] => Doctrine\ORM\Id\IdentityGenerator Object ( [sequenceName:Doctrine\ORM\Id\IdentityGenerator:private] => ) [sequenceGeneratorDefinition] => [tableGeneratorDefinition] => [changeTrackingPolicy] => 1 [isVersioned] => [versionField] => [cache] => [reflClass] => ReflectionClass Object ( [name] => TDS\Entity\Courses ) [isReadOnly] => [namingStrategy:protected] => Doctrine\ORM\Mapping\DefaultNamingStrategy Object ( ) [reflFields] => Array ( [id] => ReflectionProperty Object ( [name] => id [class] => TDS\Entity\Courses ) [name] => ReflectionProperty Object ( [name] => name [class] => TDS\Entity\Courses ) ) [instantiator:Doctrine\ORM\Mapping\ClassMetadataInfo:private] => Doctrine\Instantiator\Instantiator Object ( ) ) [conn:protected] => Doctrine\DBAL\Connection Object ( [_conn:protected] => Doctrine\DBAL\Driver\PDOConnection Object ( ) [_config:protected] => Doctrine\ORM\Configuration Object ( [_attributes:protected] => Array ( [autoGenerateProxyClasses] => 1 [proxyDir] => data/DoctrineORMModule/Proxy [proxyNamespace] => DoctrineORMModule\Proxy [entityNamespaces] => Array ( ) [customStringFunctions] => Array ( [unix_timestamp] => Swing\Utils\UnixTimestamp ) [classMetadataFactoryName] => Doctrine\ORM\Mapping\ClassMetadataFactory [metadataCacheImpl] => Doctrine\Common\Cache\ArrayCache Object ( [data:Doctrine\Common\Cache\ArrayCache:private] => Array ( [DoctrineNamespaceCacheKey[DoctrineModule]] => 1 [DoctrineModule[TDS\Entity\Courses@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Table] => Doctrine\ORM\Mapping\Table Object ( [name] => courses [schema] => [indexes] => [uniqueConstraints] => [options] => Array ( ) ) [Doctrine\ORM\Mapping\Entity] => Doctrine\ORM\Mapping\Entity Object ( [repositoryClass] => [readOnly] => ) ) [DoctrineModule[TDS\Entity\Courses$id@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Column] => Doctrine\ORM\Mapping\Column Object ( [name] => id [type] => integer [length] => [precision] => 0 [scale] => 0 [unique] => [nullable] => [options] => Array ( ) [columnDefinition] => ) [Doctrine\ORM\Mapping\Id] => Doctrine\ORM\Mapping\Id Object ( ) [Doctrine\ORM\Mapping\GeneratedValue] => Doctrine\ORM\Mapping\GeneratedValue Object ( [strategy] => IDENTITY ) ) [DoctrineModule[TDS\Entity\Courses$name@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Column] => Doctrine\ORM\Mapping\Column Object ( [name] => name [type] => string [length] => 64 [precision] => 0 [scale] => 0 [unique] => [nullable] => [options] => Array ( ) [columnDefinition] => ) ) [DoctrineModule[TDS\Entity\Courses$CLASSMETADATA][1]] => Doctrine\ORM\Mapping\ClassMetadata Object ( [name] => TDS\Entity\Courses [namespace] => TDS\Entity [rootEntityName] => TDS\Entity\Courses [customGeneratorDefinition] => [customRepositoryClassName] => [isMappedSuperclass] => [isEmbeddedClass] => [parentClasses] => Array ( ) [subClasses] => Array ( ) [embeddedClasses] => Array ( ) [namedQueries] => Array ( ) [namedNativeQueries] => Array ( ) [sqlResultSetMappings] => Array ( ) [identifier] => Array ( [0] => id ) [inheritanceType] => 1 [generatorType] => 4 [fieldMappings] => Array ( [id] => Array ( [fieldName] => id [type] => integer [scale] => 0 [length] => [unique] => [nullable] => [precision] => 0 [columnName] => id [id] => 1 ) [name] => Array ( [fieldName] => name [type] => string [scale] => 0 [length] => 64 [unique] => [nullable] => [precision] => 0 [columnName] => name ) ) [fieldNames] => Array ( [id] => id [name] => name ) [columnNames] => Array ( [id] => id [name] => name ) [discriminatorValue] => [discriminatorMap] => Array ( ) [discriminatorColumn] => [table] => Array ( [name] => courses ) [lifecycleCallbacks] => Array ( ) [entityListeners] => Array ( ) [associationMappings] => Array ( ) [isIdentifierComposite] => [containsForeignIdentifier] => [idGenerator] => Doctrine\ORM\Id\IdentityGenerator Object ( [sequenceName:Doctrine\ORM\Id\IdentityGenerator:private] => ) [sequenceGeneratorDefinition] => [tableGeneratorDefinition] => [changeTrackingPolicy] => 1 [isVersioned] => [versionField] => [cache] => [reflClass] => ReflectionClass Object ( [name] => TDS\Entity\Courses ) [isReadOnly] => [namingStrategy:protected] => Doctrine\ORM\Mapping\DefaultNamingStrategy Object ( ) [reflFields] => Array ( [id] => ReflectionProperty Object ( [name] => id [class] => TDS\Entity\Courses ) [name] => ReflectionProperty Object ( [name] => name [class] => TDS\Entity\Courses ) ) [instantiator:Doctrine\ORM\Mapping\ClassMetadataInfo:private] => Doctrine\Instantiator\Instantiator Object ( ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Table] => Doctrine\ORM\Mapping\Table Object ( [name] => courses_levels_places [schema] => [indexes] => Array ( [0] => Doctrine\ORM\Mapping\Index Object ( [name] => courses [columns] => Array ( [0] => id_course ) [flags] => [options] => ) [1] => Doctrine\ORM\Mapping\Index Object ( [name] => levels [columns] => Array ( [0] => id_level ) [flags] => [options] => ) [2] => Doctrine\ORM\Mapping\Index Object ( [name] => places [columns] => Array ( [0] => id_place ) [flags] => [options] => ) [3] => Doctrine\ORM\Mapping\Index Object ( [name] => time_slot [columns] => Array ( [0] => id_time_slot ) [flags] => [options] => ) ) [uniqueConstraints] => [options] => Array ( ) ) [Doctrine\ORM\Mapping\Entity] => Doctrine\ORM\Mapping\Entity Object ( [repositoryClass] => [readOnly] => ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$id@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\Column] => Doctrine\ORM\Mapping\Column Object ( [name] => id [type] => integer [length] => [precision] => 0 [scale] => 0 [unique] => [nullable] => [options] => Array ( ) [columnDefinition] => ) [Doctrine\ORM\Mapping\Id] => Doctrine\ORM\Mapping\Id Object ( ) [Doctrine\ORM\Mapping\GeneratedValue] => Doctrine\ORM\Mapping\GeneratedValue Object ( [strategy] => IDENTITY ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$idCourse@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\ManyToOne] => Doctrine\ORM\Mapping\ManyToOne Object ( [targetEntity] => TDS\Entity\Courses [cascade] => [fetch] => LAZY [inversedBy] => ) [Doctrine\ORM\Mapping\JoinColumns] => Doctrine\ORM\Mapping\JoinColumns Object ( [value] => Array ( [0] => Doctrine\ORM\Mapping\JoinColumn Object ( [name] => id_course [referencedColumnName] => id [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [fieldName] => ) ) ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$idLevel@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\ManyToOne] => Doctrine\ORM\Mapping\ManyToOne Object ( [targetEntity] => TDS\Entity\Levels [cascade] => [fetch] => LAZY [inversedBy] => ) [Doctrine\ORM\Mapping\JoinColumns] => Doctrine\ORM\Mapping\JoinColumns Object ( [value] => Array ( [0] => Doctrine\ORM\Mapping\JoinColumn Object ( [name] => id_level [referencedColumnName] => id [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [fieldName] => ) ) ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$idPlace@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\ManyToOne] => Doctrine\ORM\Mapping\ManyToOne Object ( [targetEntity] => TDS\Entity\Places [cascade] => [fetch] => LAZY [inversedBy] => ) [Doctrine\ORM\Mapping\JoinColumns] => Doctrine\ORM\Mapping\JoinColumns Object ( [value] => Array ( [0] => Doctrine\ORM\Mapping\JoinColumn Object ( [name] => id_place [referencedColumnName] => id [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [fieldName] => ) ) ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$idTimeSlot@[Annot]][1]] => Array ( [Doctrine\ORM\Mapping\ManyToOne] => Doctrine\ORM\Mapping\ManyToOne Object ( [targetEntity] => TDS\Entity\TimeSlot [cascade] => [fetch] => LAZY [inversedBy] => ) [Doctrine\ORM\Mapping\JoinColumns] => Doctrine\ORM\Mapping\JoinColumns Object ( [value] => Array ( [0] => Doctrine\ORM\Mapping\JoinColumn Object ( [name] => id_time_slot [referencedColumnName] => id [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [fieldName] => ) ) ) ) [DoctrineModule[TDS\Entity\CoursesLevelsPlaces$CLASSMETADATA][1]] => Doctrine\ORM\Mapping\ClassMetadata Object ( [name] => TDS\Entity\CoursesLevelsPlaces [namespace] => TDS\Entity [rootEntityName] => TDS\Entity\CoursesLevelsPlaces [customGeneratorDefinition] => [customRepositoryClassName] => [isMappedSuperclass] => [isEmbeddedClass] => [parentClasses] => Array ( ) [subClasses] => Array ( ) [embeddedClasses] => Array ( ) [namedQueries] => Array ( ) [namedNativeQueries] => Array ( ) [sqlResultSetMappings] => Array ( ) [identifier] => Array ( [0] => id ) [inheritanceType] => 1 [generatorType] => 4 [fieldMappings] => Array ( [id] => Array ( [fieldName] => id [type] => integer [scale] => 0 [length] => [unique] => [nullable] => [precision] => 0 [columnName] => id [id] => 1 ) ) [fieldNames] => Array ( [id] => id ) [columnNames] => Array ( [id] => id ) [discriminatorValue] => [discriminatorMap] => Array ( ) [discriminatorColumn] => [table] => Array ( [name] => courses_levels_places [indexes] => Array ( [courses] => Array ( [columns] => Array ( [0] => id_course ) ) [levels] => Array ( [columns] => Array ( [0] => id_level ) ) [places] => Array ( [columns] => Array ( [0] => id_place ) ) [time_slot] => Array ( [columns] => Array ( [0] => id_time_slot ) ) ) ) [lifecycleCallbacks] => Array ( ) [entityListeners] => Array ( ) [associationMappings] => Array ( [idCourse] => Array ( [fieldName] => idCourse [joinColumns] => Array ( [0] => Array ( [name] => id_course [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [referencedColumnName] => id ) ) [cascade] => Array ( ) [inversedBy] => [targetEntity] => TDS\Entity\Courses [fetch] => 2 [type] => 2 [mappedBy] => [isOwningSide] => 1 [sourceEntity] => TDS\Entity\CoursesLevelsPlaces [isCascadeRemove] => [isCascadePersist] => [isCascadeRefresh] => [isCascadeMerge] => [isCascadeDetach] => [sourceToTargetKeyColumns] => Array ( [id_course] => id ) [joinColumnFieldNames] => Array ( [id_course] => id_course ) [targetToSourceKeyColumns] => Array ( [id] => id_course ) [orphanRemoval] => ) [idLevel] => Array ( [fieldName] => idLevel [joinColumns] => Array ( [0] => Array ( [name] => id_level [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [referencedColumnName] => id ) ) [cascade] => Array ( ) [inversedBy] => [targetEntity] => TDS\Entity\Levels [fetch] => 2 [type] => 2 [mappedBy] => [isOwningSide] => 1 [sourceEntity] => TDS\Entity\CoursesLevelsPlaces [isCascadeRemove] => [isCascadePersist] => [isCascadeRefresh] => [isCascadeMerge] => [isCascadeDetach] => [sourceToTargetKeyColumns] => Array ( [id_level] => id ) [joinColumnFieldNames] => Array ( [id_level] => id_level ) [targetToSourceKeyColumns] => Array ( [id] => id_level ) [orphanRemoval] => ) [idPlace] => Array ( [fieldName] => idPlace [joinColumns] => Array ( [0] => Array ( [name] => id_place [unique] => [nullable] => 1 [onDelete] => [columnDefinition] => [referencedColumnName] => id ) ) [cascade] => Array ( ) [inversedBy] => [targetEntity] => TDS\Entity\Places [fetch] => 2 [type] => 2 [mappedBy] => [isOwningSide] => 1 [sourceEntity] => TDS\Entity\CoursesLevelsPlaces [isCascadeRemove] => [isCascadePersist] => [isCascadeRefresh] => [isCascadeMerge] => [isCascadeDetach] => [sourceToTargetKeyColumns] => Array ( [id_place] => id ) [joinColumnFieldNames] => Array ( [id_place] => id_place )
这是我提出请求的方式：
$qb = $this->getEm()->createQueryBuilder();
$qb->select('clp')->from('TDS\Entity\CoursesLevelsPlaces', 'clp');
$list = $qb->getQuery()->getResult();
问题是我无法检索我的实体。例如，如果我在 Courses 上发出请求，结果会正确显示。 每个 CoursesLevelsPlaces 行都是唯一的，并且与其他实体具有一对一的关系。
作为参考，我从我的数据库模式中生成了这些实体（反向原则）
你知道我为什么会得到这个结果吗？ 谢谢
你不应该 print_r 或 var_dump 完整的学说 2 实体，因为所有的元数据等也将被打印出来。这将导致内存问题，并且输出对于您的浏览器来说太多了。
你有几个选择
只需遍历您的结果并使用 getter 检索数据。
foreach ($list as $entity) { echo $entity->getId() . PHP_EOL; }使用 doctrine 中的调试工具。
foreach ($list as $entity) { Doctrine\Common\Util\Debug::dump($entity); }使用调试器 (xdebug) 并在您的 IDE 中放置一个断点并观察实体内容