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数据表设计和迁移


创建数据迁移表

shell
# 朋友圈消息表
npx sequelize migration:generate --name=moment
# 朋友圈时间轴表
npx sequelize migration:generate --name=moment_timeline
# 朋友圈点赞表
npx sequelize migration:generate --name=moment_like
# 朋友圈评论表
npx sequelize migration:generate --name=moment_comment

1.执行完命令后,会在database / migrations / 目录下生成数据表迁移文件,然后定义

js
// moment表
"use strict";

module.exports = {
  up: async (queryInterface, Sequelize) => {
    const { INTEGER, STRING, DATE, ENUM, TEXT } = Sequelize;
    // 创建表
    await queryInterface.createTable("moment", {
      id: {
        type: INTEGER(20).UNSIGNED,
        primaryKey: true,
        autoIncrement: true,
      },
      content: {
        type: TEXT,
        allowNull: false,
        defaultValue: "",
        comment: "朋友圈内容",
      },
      image: {
        type: TEXT,
        allowNull: false,
        defaultValue: "",
        comment: "朋友圈图片",
      },
      video: {
        type: STRING,
        allowNull: false,
        defaultValue: "",
        comment: "朋友圈视频",
      },
      location: {
        type: STRING,
        allowNull: false,
        defaultValue: "",
        comment: "位置",
      },
      remind: {
        type: STRING,
        allowNull: false,
        defaultValue: "",
        comment: "提醒谁看",
      },
      see: {
        type: STRING,
        allowNull: false,
        defaultValue: "all",
        comment: "谁可以看 all公开 none私密",
      },
      user_id: {
        type: INTEGER(20).UNSIGNED,
        allowNull: false,
        comment: "用户id",
        //  定义外键(重要)
        references: {
          model: "user", // 对应表名称(数据表名称)
          key: "id", // 对应表的主键
        },
        onUpdate: "restrict", // 更新时操作
        onDelete: "cascade", // 删除时操作
      },
      created_at: DATE,
      updated_at: DATE,
    });
  },

  down: async (queryInterface) => {
    await queryInterface.dropTable("moment");
  },
};
js
// moment_timeline表
"use strict";

module.exports = {
  up: async (queryInterface, Sequelize) => {
    const { INTEGER, STRING, DATE, ENUM, TEXT } = Sequelize;
    // 创建表
    await queryInterface.createTable("moment_timeline", {
      id: {
        type: INTEGER(20).UNSIGNED,
        primaryKey: true,
        autoIncrement: true,
      },
      user_id: {
        type: INTEGER(20).UNSIGNED,
        allowNull: false,
        comment: "用户id",
        //  定义外键(重要)
        references: {
          model: "user", // 对应表名称(数据表名称)
          key: "id", // 对应表的主键
        },
        onUpdate: "restrict", // 更新时操作
        onDelete: "cascade", // 删除时操作
      },
      moment_id: {
        type: INTEGER(20).UNSIGNED,
        allowNull: false,
        comment: "朋友圈消息id",
        //  定义外键(重要)
        references: {
          model: "moment", // 对应表名称(数据表名称)
          key: "id", // 对应表的主键
        },
        onUpdate: "restrict", // 更新时操作
        onDelete: "cascade", // 删除时操作
      },
      own: {
        type: INTEGER(1),
        allowNull: false,
        defaultValue: 0,
        comment: "是否是自己的 0否1是",
      },
      created_at: DATE,
      updated_at: DATE,
    });
  },

  down: async (queryInterface) => {
    await queryInterface.dropTable("moment_timeline");
  },
};
js
// moment_like表
"use strict";

module.exports = {
  up: async (queryInterface, Sequelize) => {
    const { INTEGER, STRING, DATE, ENUM, TEXT } = Sequelize;
    // 创建表
    await queryInterface.createTable("moment_like", {
      id: {
        type: INTEGER(20).UNSIGNED,
        primaryKey: true,
        autoIncrement: true,
      },
      user_id: {
        type: INTEGER(20).UNSIGNED,
        allowNull: false,
        comment: "点赞用户id",
        //  定义外键(重要)
        references: {
          model: "user", // 对应表名称(数据表名称)
          key: "id", // 对应表的主键
        },
        onUpdate: "restrict", // 更新时操作
        onDelete: "cascade", // 删除时操作
      },
      moment_id: {
        type: INTEGER(20).UNSIGNED,
        allowNull: false,
        comment: "朋友圈消息id",
        //  定义外键(重要)
        references: {
          model: "moment", // 对应表名称(数据表名称)
          key: "id", // 对应表的主键
        },
        onUpdate: "restrict", // 更新时操作
        onDelete: "cascade", // 删除时操作
      },
      created_at: DATE,
      updated_at: DATE,
    });
  },

  down: async (queryInterface) => {
    await queryInterface.dropTable("moment_like");
  },
};
js
// moment_comment表
"use strict";

module.exports = {
  up: async (queryInterface, Sequelize) => {
    const { INTEGER, STRING, DATE, ENUM, TEXT } = Sequelize;
    // 创建表
    await queryInterface.createTable("moment_comment", {
      id: {
        type: INTEGER(20).UNSIGNED,
        primaryKey: true,
        autoIncrement: true,
      },
      user_id: {
        type: INTEGER(20).UNSIGNED,
        allowNull: false,
        comment: "评论用户id",
        //  定义外键(重要)
        references: {
          model: "user", // 对应表名称(数据表名称)
          key: "id", // 对应表的主键
        },
        onUpdate: "restrict", // 更新时操作
        onDelete: "cascade", // 删除时操作
      },
      moment_id: {
        type: INTEGER(20).UNSIGNED,
        allowNull: false,
        comment: "朋友圈消息id",
        //  定义外键(重要)
        references: {
          model: "moment", // 对应表名称(数据表名称)
          key: "id", // 对应表的主键
        },
        onUpdate: "restrict", // 更新时操作
        onDelete: "cascade", // 删除时操作
      },
      content: {
        type: TEXT,
        allowNull: false,
        defaultValue: "",
        comment: "评论内容",
      },
      reply_id: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: "回复用户id 0顶级评论",
      },
      created_at: DATE,
      updated_at: DATE,
    });
  },

  down: async (queryInterface) => {
    await queryInterface.dropTable("moment_comment");
  },
};

创建模型

js
// app/model/moment.js
"use strict";
module.exports = (app) => {
  const { STRING, INTEGER, DATE, ENUM, TEXT } = app.Sequelize;
  // 配置(重要:一定要配置详细,一定要!!!)
  const Moment = app.model.define("moment", {
    id: {
      type: INTEGER(20).UNSIGNED,
      primaryKey: true,
      autoIncrement: true,
    },
    content: {
      type: TEXT,
      allowNull: false,
      defaultValue: "",
      comment: "朋友圈内容",
    },
    image: {
      type: TEXT,
      allowNull: false,
      defaultValue: "",
      comment: "朋友圈图片",
    },
    video: {
      type: STRING,
      allowNull: false,
      defaultValue: "",
      comment: "朋友圈视频",
    },
    location: {
      type: STRING,
      allowNull: false,
      defaultValue: "",
      comment: "位置",
    },
    remind: {
      type: STRING,
      allowNull: false,
      defaultValue: "",
      comment: "提醒谁看",
    },
    see: {
      type: STRING,
      allowNull: false,
      defaultValue: "all",
      comment: "谁可以看 all公开 none私密",
    },
    user_id: {
      type: INTEGER(20).UNSIGNED,
      allowNull: false,
      comment: "用户id",
      //  定义外键(重要)
      references: {
        model: "user", // 对应表名称(数据表名称)
        key: "id", // 对应表的主键
      },
      onUpdate: "restrict", // 更新时操作
      onDelete: "cascade", // 删除时操作
    },
    created_at: {
      type: DATE,
      get() {
        return (new Date(this.getDataValue("created_at"))).getTime();
      },
    },
    updated_at: DATE,
  });

  Moment.associate = function (model) {
    Moment.hasMany(app.model.MomentComment, {
      foreignKey: "moment_id",
    });
    Moment.hasMany(app.model.MomentLike, {
      foreignKey: "moment_id",
    });
    Moment.belongsTo(app.model.User, {
      foreignKey: "user_id",
    });
  };

  return Moment;
};
js
// app/model/moment_timeline.js
"use strict";
module.exports = (app) => {
  const { STRING, INTEGER, DATE, ENUM, TEXT } = app.Sequelize;
  // 配置(重要:一定要配置详细,一定要!!!)
  const MomentTimeline = app.model.define("moment_timeline", {
    id: {
      type: INTEGER(20).UNSIGNED,
      primaryKey: true,
      autoIncrement: true,
    },
    user_id: {
      type: INTEGER(20).UNSIGNED,
      allowNull: false,
      comment: "用户id",
      //  定义外键(重要)
      references: {
        model: "user", // 对应表名称(数据表名称)
        key: "id", // 对应表的主键
      },
      onUpdate: "restrict", // 更新时操作
      onDelete: "cascade", // 删除时操作
    },
    moment_id: {
      type: INTEGER(20).UNSIGNED,
      allowNull: false,
      comment: "朋友圈消息id",
      //  定义外键(重要)
      references: {
        model: "moment", // 对应表名称(数据表名称)
        key: "id", // 对应表的主键
      },
      onUpdate: "restrict", // 更新时操作
      onDelete: "cascade", // 删除时操作
    },
    own: {
      type: INTEGER(1),
      allowNull: false,
      defaultValue: 0,
      comment: "是否是自己的 0否1是",
    },
    created_at: {
      type: DATE,
      get(val) {
        return (new Date(this.getDataValue("created_at"))).getTime();
      },
    },
    updated_at: DATE,
  });

  MomentTimeline.associate = function (model) {
    MomentTimeline.belongsTo(app.model.Moment, {
      foreignKey: "moment_id",
    });
    MomentTimeline.belongsTo(app.model.User, {
      foreignKey: "user_id",
    });
  };

  return MomentTimeline;
};
js
// app/model/moment_comment.js
"use strict";
module.exports = (app) => {
  const { STRING, INTEGER, DATE, ENUM, TEXT } = app.Sequelize;
  // 配置(重要:一定要配置详细,一定要!!!)
  const MomentComment = app.model.define("moment_comment", {
    id: {
      type: INTEGER(20).UNSIGNED,
      primaryKey: true,
      autoIncrement: true,
    },
    user_id: {
      type: INTEGER(20).UNSIGNED,
      allowNull: false,
      comment: "评论用户id",
      //  定义外键(重要)
      references: {
        model: "user", // 对应表名称(数据表名称)
        key: "id", // 对应表的主键
      },
      onUpdate: "restrict", // 更新时操作
      onDelete: "cascade", // 删除时操作
    },
    moment_id: {
      type: INTEGER(20).UNSIGNED,
      allowNull: false,
      comment: "朋友圈消息id",
      //  定义外键(重要)
      references: {
        model: "moment", // 对应表名称(数据表名称)
        key: "id", // 对应表的主键
      },
      onUpdate: "restrict", // 更新时操作
      onDelete: "cascade", // 删除时操作
    },
    content: {
      type: TEXT,
      allowNull: false,
      defaultValue: "",
      comment: "评论内容",
    },
    reply_id: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: "回复用户id 0顶级评论",
    },
    created_at: DATE,
    updated_at: DATE,
  });

  MomentComment.associate = function (model) {
    MomentComment.belongsTo(app.model.User, {
      foreignKey: "user_id",
      as: "momentCommentUser",
    });
    MomentComment.belongsTo(app.model.User, {
      foreignKey: "reply_id",
      as: "momentCommentReply",
    });
  };

  return MomentComment;
};
js
// app/model/moment_like.js
"use strict";
module.exports = (app) => {
  const { STRING, INTEGER, DATE, ENUM, TEXT } = app.Sequelize;
  // 配置(重要:一定要配置详细,一定要!!!)
  const MomentLike = app.model.define("moment_like", {
    id: {
      type: INTEGER(20).UNSIGNED,
      primaryKey: true,
      autoIncrement: true,
    },
    user_id: {
      type: INTEGER(20).UNSIGNED,
      allowNull: false,
      comment: "点赞用户id",
      //  定义外键(重要)
      references: {
        model: "user", // 对应表名称(数据表名称)
        key: "id", // 对应表的主键
      },
      onUpdate: "restrict", // 更新时操作
      onDelete: "cascade", // 删除时操作
    },
    moment_id: {
      type: INTEGER(20).UNSIGNED,
      allowNull: false,
      comment: "朋友圈消息id",
      //  定义外键(重要)
      references: {
        model: "moment", // 对应表名称(数据表名称)
        key: "id", // 对应表的主键
      },
      onUpdate: "restrict", // 更新时操作
      onDelete: "cascade", // 删除时操作
    },
    created_at: DATE,
    updated_at: DATE,
  });

  MomentLike.associate = function (model) {
    MomentLike.belongsTo(app.model.User, {
      foreignKey: "user_id",
    });
  };

  return MomentLike;
};