Question

我正在尝试使用Sequelize迁移创建两个表Organizations和OrganisationTypes。但是，当我进行迁移以创建“组织”表时，会得到一个ERROR: Cannot add foreign key constraint。我看不到任何可能出错的东西，例如类型或名称不匹配。

这是两个迁移（1：OrganizationTypes； 2：Organizations）：

up: (queryInterface, Sequelize) => {
  return queryInterface.createTable('OrganisationTypes', {
    id: {
      allowNull: false,
      autoIncrement: true,
      primaryKey: true,
      unique: true,
      type: Sequelize.INTEGER
    },
    name: {
      allowNull: false,
      unique: true,
      type: Sequelize.STRING
    }
  });
}

up: (queryInterface, Sequelize) => {
  return queryInterface.createTable('Organisations', {
    id: {
      allowNull: false,
      autoIncrement: true,
      primaryKey: true,
      unique: true,
      type: Sequelize.INTEGER
    },
    name: {
      allowNull: false,
      unique: true,
      type: Sequelize.STRING(60)
    },
    organisationTypeId: {
      allowNull: false,
      type: Sequelize.INTEGER,
      references: {
        model: 'OrganisationTypes',
        key: 'id'
      },
      onDelete: 'SET NULL'
    }
  });
}

Answer 1

配置似乎自相矛盾：

// ...
organisationTypeId: {
  allowNull: false,         // <--- here it's not allowed to be null
  type: Sequelize.INTEGER,
  references: {
    model: 'OrganisationTypes',
    key: 'id'
  },
  onDelete: 'SET NULL'      // <--- yet here it's supposed to be set null upon parent deletion

后续迁移会显示“错误：无法添加外键约束”

1 个答案: