Question

我想在offeret表中添加offerzone表作为外键。使用sequelize和以下模型是用angularjs编写的。

module.exports = function(sequelize, DataTypes) {
let offerzone = sequelize.define('offerzone', {
title: DataTypes.STRING,
moid: DataTypes.INTEGER,
seoTandC: DataTypes.STRING,
isActive: DataTypes.BOOLEAN,
set: DataTypes.ARRAY(DataTypes.STRING),
isDeleted: DataTypes.BOOLEAN
}, {
classMethods: {
  associate: function(models) {
    offerzone.belongsToMany(models.offerset, {
      through: 'models.offerset'
      foreign-key: 'offerzone'
      as: 'offerset'
    });

    // associations can be defined here
  }
}
});
return offerzone;
};

Answer 1

要在sequelize中定义hasMany关联，如果您想拥有例如Videos hasMany Comments，则以下步骤如下。

在视频中，您将拥有类似视频模型

的内容

module.exports = function (sequelize, DataTypes) {
    var Video = sequelize.define("Video", {
         author: {
            type: DataTypes.STRING,
            allowNull: false
        }
    }, {
        classMethods: {
            associate: function (models) {
                Video.hasMany(models.Comment, {foreignKey: 'videoid', onDelete: 'cascade', hooks: true});
            }
        }
    });
    return Video;
};

评论模型将是：

module.exports = function (sequelize, DataTypes) {
    var Comment = sequelize.define("Comment", {
        commentary: {
            type: DataTypes.TEXT,
            allowNull: false
        }
    }, {
        classMethods: {
            associate: function (models) {
                Comment.belongsTo(models.Video, {foreignKey: 'videoid', allowNull: false});
            }
        }
    });
    return Comment;
};

部分onDelete: 'cascade', hooks: true表示如果删除视频，评论也会被删除

如何在sequelize中创建hasMany关联

1 个答案: