Sequelize属于ToMany

Question

我使用了Sequelize并使用belongsToMany()设置了多对多关系。但是，当我查询数据时，如下所示：

api.models.operator.find({ 
      where: { id: connection.params.id }, 
      include: [ 
        { model: api.models.permission, 
          include: [
            { model: api.models.activity }
          ]
        } 
      ]
    })

我收到activity is not associated to permission!错误。为什么？ belongsToMany是否通过权限将操作符连接到运算符意味着关联？

我的权限模型：

module.exports = function(sequelize, DataTypes) {

  return sequelize.define("permission", 
    {
      id: {
        type: DataTypes.BIGINT,
        allowNull: false,
        primaryKey: true,
        autoIncrement: true
      },
      operator_id: {
        type: DataTypes.BIGINT,
        allowNull: false,
        references: 'operator',
        referencesKey: 'id',
        comment: "The Operator in this Permission."
      },
      activity_id: {
        type: DataTypes.BIGINT,
        allowNull: false,
        references: 'activity',
        referencesKey: 'id',
        comment: "The Activity in this Permission."
      },
      createdAt: {
        type: DataTypes.DATE,
        allowNull: false,
        defaultValue: DataTypes.NOW,
        comment: "Date of record creation."
      },
      updatedAt: {
        type: DataTypes.DATE,
        allowNull: false,
        defaultValue: DataTypes.NOW,
        comment: "Date of last record update."
      },
      deletedAt: {
        type: DataTypes.DATE,
        comment: "Date record was marked as deleted."
      }
    }, 
    {
      comment: "A Permission indicates an allowed Activity by an Operator, ex: superadmin is allowed to 'POST /workorders'.",
      classMethods: {
        associate: function(models) {

          models.operator.belongsToMany(models.activity, {through: models.permission, foreignKey: 'operator_id', onDelete: 'CASCADE', onUpdate: 'CASCADE'});
          models.activity.belongsToMany(models.operator, {through: models.permission, foreignKey: 'activity_id', onDelete: 'CASCADE', onUpdate: 'CASCADE'});

        }
      }
    }
  );

}

Answer 1

我自己解决的问题如下：

ModelA.belongsToMany(ModelB, {
        through: 'ModelC',
        foreignKey: 'ModelAID'
    });

你只能打电话：

ModelA.findAll({
include: [{
    model: ModelB
}]}).then(function(success) {}, function(error) {});

如果你想使用：

ModelB.findAll({
include: [{
    model: ModelA
}]}).then(function(success) {}, function(error) {});

您必须声明

ModelB.belongsToMany(ModelA, {
        through: 'ModelC',
        foreignKey: 'ModelBID'
    });

^^祝你好运!!!! ^^

Answer 2

通过模型不直接与任何模型相关联。为了能够包含直通模型，您需要permissions.belongsTo(activity)或类似的

Answer 3

这个怎么样？我记得关系表数据将默认包装在连接表数据对象中。

api.models.operator.find({ 
      where: { id: connection.params.id }, 
      include: [ 
        { 
           model: api.models.activity
        } 
      ]
    })