如何获得对我的Array(Symfony 4)中ArrayCollection数据的访问?

时间:2019-02-12 09:00:27

标签: arrays symfony doctrine arraycollection

fields table

enter image description here

productgroup table

enter image description here

在控制器中,我像这样加载fields_array

$fields_array = $this->getDoctrine()->getRepository(class::fields)->findAll();

如果未连接字段和产品组,则我的fields_array如下所示:

array:2 [▼
  0 => Fields {#7460 ▼
    -id: 3
    -name: "cat"
    -unique_id: "5a38c820ed"
    -productgroup: PersistentCollection {#7464 ▼
      -snapshot: []
      -owner: Fields {#7460}
      -association: array:20 [ …20]
      -em: EntityManager {#2815 …11}
      -backRefFieldName: "fields"
      -typeClass: ClassMetadata {#6494 …}
      -isDirty: false
      #collection: ArrayCollection {#7465 ▼
        -elements: []
      }
      #initialized: false
    }
    -type: Type {#7541 ▶}
  }
  1 => Fields {#7542 ▼
    -id: 4
    -name: "horse"
    -unique_id: "bd7762b0e6"
    -productgroup: PersistentCollection {#7543 ▼
      -snapshot: []
      -owner: Fields {#7542}
      -association: array:20 [ …20]
      -em: EntityManager {#2815 …11}
      -backRefFieldName: "fields"
      -typeClass: ClassMetadata {#6494 …}
      -isDirty: false
      #collection: ArrayCollection {#7544 ▼ 
        -elements: []
      }
      #initialized: false
    }
    -type: Type {#7545 ▶}
  }
]

如您所见,ArrayCollecton不包含任何元素。

因此,现在我将cat与产品组Animals连接起来。所以我的表fields_productgroup看起来像这样:

enter image description here

现在您可以看到,我的ArrayCollection中的cat包含元素Animals

array:2 [▼
  0 => Fields {#7460 ▼
    -id: 3
    -name: "cat"
    -unique_id: "5a38c820ed"
    -productgroup: PersistentCollection {#7464 ▼
      -snapshot: array:1 [ …1]
      -owner: Fields {#7460}
      -association: array:20 [ …20]
      -em: EntityManager {#2815 …11}
      -backRefFieldName: "fields"
      -typeClass: ClassMetadata {#6494 …}
      -isDirty: false
      #collection: ArrayCollection {#7465 ▼
        -elements: array:1 [▼
          0 => Productgroup {#7146 ▼
            -id: 6
            -name: "Animals"
            -unique_id: "9e4ef1c46f"
            -fields: PersistentCollection {#7357 ▶}
          }
        ]
      }
      #initialized: true
    }
    -type: Type {#7541 ▶}
  }
  1 => Fields {#7542 ▼
    -id: 4
    -name: "horse"
    -unique_id: "bd7762b0e6"
    -productgroup: PersistentCollection {#7543 ▼
      -snapshot: []
      -owner: Fields {#7542}
      -association: array:20 [ …20]
      -em: EntityManager {#2815 …11}
      -backRefFieldName: "fields"
      -typeClass: ClassMetadata {#6494 …}
      -isDirty: false
      #collection: ArrayCollection {#7544 ▼
        -elements: []
      }
      #initialized: false
    }
    -type: Type {#7545 ▶}
  }
]

现在,我也将horse与产品组Animals连接起来。所以我的表fields_productgroup看起来像这样:

enter image description here

我的fields_array的{​​{1}}显示horse中有一个元素,但其中不包含ArrayCollection的信息。它只是一个空数组...但是我实际上需要产品组马所连接的信息

Animals

我的字段实体:

array:2 [▼
  0 => Fields {#7460 ▼
    -id: 3
    -name: "cat"
    -unique_id: "5a38c820ed"
    -productgroup: PersistentCollection {#7464 ▼
      -snapshot: array:1 [ …1]
      -owner: Fields {#7460}
      -association: array:20 [ …20]
      -em: EntityManager {#2815 …11}
      -backRefFieldName: "fields"
      -typeClass: ClassMetadata {#6494 …}
      -isDirty: false
      #collection: ArrayCollection {#7465 ▼
        -elements: array:1 [▼
          0 => Productgroup {#7146 ▼
            -id: 6
            -name: "Animals"
            -unique_id: "9e4ef1c46f"
            -fields: PersistentCollection {#7357 ▶}
          }
        ]
      }
      #initialized: true
    }
    -type: Type {#7541 ▶}
  }
  1 => Fields {#7542 ▼
    -id: 4
    -name: "horse"
    -unique_id: "bd7762b0e6"
    -productgroup: PersistentCollection {#7543 ▼
      -snapshot: array:1 [ …1]
      -owner: Fields {#7542}
      -association: array:20 [ …20]
      -em: EntityManager {#2815 …11}
      -backRefFieldName: "fields"
      -typeClass: ClassMetadata {#6494 …}
      -isDirty: false
      #collection: ArrayCollection {#7544 ▼
        -elements: array:1 [▼
          0 => Productgroup {#7146}
        ]
      }
      #initialized: true
    }
    -type: Type {#7545 ▶}
  }
]

1 个答案:

答案 0 :(得分:1)

首先,我认为您正在将PHP对象与PHP数组混淆。但是从您的屏幕截图来看,您似乎确实拥有了想要的东西,“马”对象的productgroup关联已完全加载。

这可以在您的转储中看到:

Cat dump -- Related Productgroup uid is #7146 Horse dump -- Related Productgroup uid is also #7146

正如人们所看到的,猫和马对象的相关产品组对象的uid为#7146,这与预期的一样,因为它们与同一产品组相关。

我认为您只是被马的产品组无法在转储中扩展的事实所误导。

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