Question

是否可以在Doctrine2中的Association中创建外部字段。主要目的是建立一种关联。

例如，我们有联系和机会。我需要具有此关联类型的联系人和机会之间的关联。

数据示例：

contact_id   | opportunity_id   | association_type
------------------------------------------------------
<contact_id> | <opportunity_id> | <Executive Sponsor>    
<contact_id> | <opportunity_id> | <Business Evaluator>

是否可以在Doctrine2中实现？

这是我的协会（YAML）：

Opportunity:
  type: entity
  table: opportinity
  ...
  ...
  ...
  manyToMany:
    contacts:
      targetEntity: Contact
      joinTable:
        name: opportinities_contacts
        joinColumns:
          opportunity_id:
            referencedColumnName: id
        inverseJoinColumns:
          contact_id:
            referencedColumnName: id

由于

Answer 1

本案例中的最佳做法是创建实体关联类。

基本上，将您的多对多关系拆分为一对多对一关系，并在中间使用新类

创建一个新类“ContactOpportunities”（在我的组织中，我们将它们命名为ToMap =＆gt;位于类之间的ContactToOpportunityMap。

class ContactOpportunity {

    /**
     * @var <FQN>\Contact
     *
     * @ORM\Id
     * @ORM\ManyToOne(targetEntity="<FQN>\Contact", inversedBy='opportunities')
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name='Contact_ID', referencedColumnName="id")
     * })
    protected $contact;


    /**
     * @var <FQN>\Opportunity
     *
     * @ORM\Id
     * @ORM\ManyToOne(targetEntity="<FQN>\Opportunity", inversedBy='contacts')
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name='Opportunity_ID', referencedColumnName="id")
     * })
    protected $opportunity;

    /*
     * @var string type
     *
     * @ORM\Column(name="Association_Type", type="string")
    protected $type;
 }

或者在yml ...

ContactOpportunity
  type: entity
  table: opportunities_contacts
  ...
  ...
  ...
  manyToOne:
    targetEntity: Contact
    inversedBy: opportunities
    joinColumn:
      name: contact_id
      referencedColumnName: id
  manyToOne:
    targetEntity: Opportunity
    inversedBy: contacts
    joinColumn:
      name: opportunity_id
      referencedColumnName: id

然后转换现有的类以定位这个新类：

Opportunity:
  type: entity
  table: opportunity
  ...
  ...
  ...
  oneToMany:
    contacts:
      targetEntity: ContactOpportunity
      mappedBy: opportunity

Contact:
  type: entity
  table: contact
  ...
  ...
  ...
  oneToMany:
    opportunities:
      targetEntity: ContactOpportunity
      mappedBy: contact

Doctrine2 - 具有关联类型的多对多关联

1 个答案: