Question

我不确定这是我的代码中的错误还是错误：

<?php
namespace MyProject\Model;

/**
 * @Entity
 * @InheritanceType("SINGLE_TABLE")
 * @DiscriminatorColumn(name="discr", type="string")
 * @DiscriminatorMap({
 *      "customer" = "Customer", 
 *      "projectManager" = "ProjectManager", 
 *      "developer" = "Developer"
 * })
 */
abstract class Person
{
    // ...
}

/**
 * @Entity
 */
class Customer extends Person
{
    // ...
}

/**
 * @Entity
 */
abstract class Employee extends Person
{
    /**
     * @var boolean
     * @Column(name="retired", type="boolean", nullable=true)
     */
    protected $retired;
}

/**
 * @Entity
 */
class ProjectManager extends Employee
{
    // ...
}

/**
 * @Entity
 */
class Developer extends Employee
{
    // ...
}

尝试更新数据库时app/console doctrine:schema:update --force Doctrine忽略Employee :: retired属性，应用程序将导致错误：未知列'已退役'

如果我手动创建了列，一切都按预期工作。此外，这只发生在单个表中，因此如果我切换到类表继承，则在模式更新时创建该列。

Answer 1

你不能跳过＆＃39;对于最低级别的继承，您必须描述每个级别。

在leat它适用于@InheritanceType("JOINED")，我猜测它与SINGLE_TABLE相同。

<?php
namespace MyProject\Model;

/**
 * @Entity
 * @InheritanceType("SINGLE_TABLE")
 * @DiscriminatorColumn(name="discr", type="string")
 * @DiscriminatorMap({
 *      "customer"       = "Customer", 
 *      "employee"       = "Employee",
 *      "projectManager" = "ProjectManager", 
 *      "developer"      = "Developer"
 * })
 */
abstract class Person
{
    // ...
}

/**
 * @Entity
 */
class Customer extends Person
{
    // ...
}

/**
 * @Entity
 * @InheritanceType("SINGLE_TABLE")
 * @DiscriminatorColumn(name="discr", type="string")
 * @DiscriminatorMap({
 *      "employee"       = "Employee", 
 *      "projectManager" = "ProjectManager", 
 *      "developer"      = "Developer"
 * })
 */
abstract class Employee extends Person
{
    /**
     * @var boolean
     * @Column(name="retired", type="boolean", nullable=true)
     */
    protected $retired;
}

/**
 * @Entity
 */
class ProjectManager extends Employee
{
    // ...
}

/**
 * @Entity
 */
class Developer extends Employee
{
    // ...
}

Answer 2

您无需在根实体的鉴别器映射中映射中间抽象实体，以使其正常工作。只是不要将其设为@Entity，而是@MappedSuperclass。

在您的情况下，Employee应该是@MappedSuperclass，并且所有扩展 Employee和地图中显示的@Entity。

Doctrine2多级单表继承（未知列）

2 个答案: