Symfony2 实体多对多关系数据结构



我有以下设置:

Entity: 'Customers'
Entity: 'Accounts'

这些实体处于@ManyToMany关系中。

所以我有以下数据库表:

customers
accounts
customers_accounts

现在,我需要为每个帐户的每个客户保存数据。例:

有一个客户"汤姆"。两个帐户"Ben"和"Eric"负责客户"Tom"。现在我需要保存帐户"Ben"是否已经与客户"Tom"交谈过。此外,我需要为帐户"埃里克"保存相同的状态。

在这里组织数据库的最佳方式是什么?最好的办法是表"customers_accounts"中有一列额外的列。这可能吗?还有哪些其他选择?

感谢您的帮助!


只是为了向您展示实体如何相互链接:

/**
 * @ORMManyToMany(targetEntity="AppBundleEntityCustomer", inversedBy="accounts", cascade={"persist"})
 * @ORMJoinTable(name="customers_accounts")
 **/
protected $customers;

ManyToMany 您无法在联结表中添加其他字段,即customers_accounts,要为联结表添加其他字段,您必须调整映射,因为创建一个联结实体,该实体将以ManyToOne方式指向您的客户和帐户实体,您的客户和帐户实体将以OneToMany方式指向您的联结实体

        OneToMany                 OneToMany
      ----------->            <------------
Customer       CustomerHasAccounts       Accounts
      <----------             ------------>
        ManyToOne                ManyToOne

客户实体

/**
 * Customer
 * @ORMTable(name="customer")
 * @ORMEntity
 */
class Customer
{
    /**
     * @ORMOneToMany(targetEntity="NameSpaceYourBundleEntityCustomerHasAccounts", mappedBy="customers",cascade={"persist","remove"} )
     */
    protected $hasAccounts;
}

帐户实体

/**
 * Accounts
 * @ORMTable(name="accounts")
 * @ORMEntity
 */
class Accounts 
{
    /**
     * @ORMOneToMany(targetEntity="NameSpaceYourBundleEntityCustomerHasAccounts", mappedBy="acccounts",cascade={"persist","remove"} )
     */
    protected $hasCustomers;
}

客户拥有帐户实体

/**
 * CustomerHasAccounts
 * @ORMTable(name="customers_accounts")
 * @ORMEntity
 */
class CustomerHasAccounts
{
    /**
     * @ORMManyToOne(targetEntity="NameSpaceYourBundleEntityAccounts", cascade={"persist"}, fetch="LAZY")
     * @ORMJoinColumn(name="acccount_id", referencedColumnName="id")
     */
    protected $acccounts;
    /**
     * @ORMManyToOne(targetEntity="NameSpaceYourBundleEntityCustomer", cascade={"persist","remove"} , fetch="LAZY" )
     * @ORMJoinColumn(name="customers_id", referencedColumnName="id",nullable=true)
     */
    protected $customers;

    /**
     * 
     * @ORMColumn(name="status", type="string")
     */
    protected $status;
}

您必须通过 OneToMany-ManyToOne 实体在您的 2 个 ManyToMany 实体之间建立链接来转换您的实体之间的多对多关系,该实体将拥有与此关系相关的所有数据。

客户

Class Customer
{
    /**
     * @ORMOneToMany(targetEntity="AppBundleEntityCustomerAccount", mappedBy="societe", cascade={"Persist"})
     */
    private $customerAccounts;
}

帐户

Class Account
{
    /**
     * @ORMOneToMany(targetEntity="AppBundleEntityCustomerAccount", mappedBy="account", cascade={"Persist"})
     */
    private $customerAccounts;
}

客户帐户

Class CustomerAccount
{
    /**
     * @ORMId
     * @ORMManyToOne(targetEntity="AppBundleEntityCustomer", inversedBy="customerAccounts")
     */
    private $societe;
    /**
     * @ORMId
     * @ORMManyToOne(targetEntity="AppBundleEntityAccount", inversedBy="customerAccounts")
     */
    private $contact;
    /**
     * @var boolean
     *
     * @ORMColumn(name="alreadySpoken", type="boolean")
     */
    private $alreadySpoken;
}

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