数据表设计和迁移

创建数据迁移表

shell

npx sequelize migration:generate --name=video
npx sequelize migration:generate --name=video_detail
npx sequelize migration:generate --name=video_play

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

// video
"use strict";
module.exports = {
  up: (queryInterface, Sequelize) => {
    const { INTEGER, STRING, DATE, ENUM, TEXT } = Sequelize;
    return queryInterface.createTable("video", {
      id: {
        type: INTEGER(20),
        primaryKey: true,
        autoIncrement: true,
      },
      title: {
        type: STRING(100),
        allowNull: false,
        defaultValue: "",
        comment: "视频标题",
      },
      cover: {
        type: STRING,
        allowNull: true,
        defaultValue: "",
        comment: "视频封面",
      },
      category_id: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: "分类id",
        references: {
          model: "category",
          key: "id",
        },
        onDelete: "cascade",
        onUpdate: "restrict", // 更新时操作
      },
      user_id: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: "用户id",
        references: {
          model: "user",
          key: "id",
        },
        onDelete: "cascade",
        onUpdate: "restrict", // 更新时操作
      },
      duration: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: "总时长",
      },
      desc: {
        type: TEXT,
        allowNull: false,
        defaultValue: "",
        comment: "视频描述",
      },
      play_count: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: "播放量",
      },
      danmu_count: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: "弹幕量",
      },
      created_time: DATE,
      updated_time: DATE,
    });
  },

  down: (queryInterface, Sequelize) => {
    return queryInterface.dropTable("video");
  },
};

// video_detail
"use strict";

module.exports = {
  up: (queryInterface, Sequelize) => {
    const { INTEGER, STRING, DATE, ENUM, TEXT } = Sequelize;
    return queryInterface.createTable("video_detail", {
      id: {
        type: INTEGER(20),
        primaryKey: true,
        autoIncrement: true,
      },
      title: {
        type: STRING(100),
        allowNull: false,
        defaultValue: "",
        comment: "子标题",
      },
      video_id: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: "视频id",
        references: {
          model: "video",
          key: "id",
        },
        onDelete: "cascade",
        onUpdate: "restrict", // 更新时操作
      },
      url: {
        type: STRING,
        allowNull: true,
        defaultValue: "",
        comment: "视频链接",
      },
      desc: {
        type: TEXT,
        allowNull: false,
        defaultValue: "",
        comment: "子描述",
      },
      created_time: DATE,
      updated_time: DATE,
    });
  },

  down: (queryInterface, Sequelize) => {
    return queryInterface.dropTable("video_detail");
  },
};

// video_play
"use strict";

module.exports = {
  up: (queryInterface, Sequelize) => {
    const { INTEGER, STRING, DATE, ENUM, TEXT } = Sequelize;
    return queryInterface.createTable("video_play", {
      id: {
        type: INTEGER(20),
        primaryKey: true,
        autoIncrement: true,
      },
      ip: {
        type: STRING(50),
        allowNull: false,
        defaultValue: 0,
        comment: "ip地址",
      },
      video_id: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: "视频id",
        references: {
          model: "video",
          key: "id",
        },
        onDelete: "cascade",
        onUpdate: "restrict", // 更新时操作
      },
      created_time: DATE,
      updated_time: DATE,
    });
  },

  down: (queryInterface, Sequelize) => {
    return queryInterface.dropTable("video_play");
  },
};

执行 migrate 进行数据库变更 npx sequelize db:migrate 模型创建

// app/model/video.js
module.exports = (app) => {
  const { STRING, INTEGER, DATE, ENUM, TEXT } = app.Sequelize;

  const Video = app.model.define("video", {
    id: {
      type: INTEGER(20),
      primaryKey: true,
      autoIncrement: true,
    },
    title: {
      type: STRING(100),
      allowNull: false,
      defaultValue: "",
      comment: "视频标题",
    },
    cover: {
      type: STRING,
      allowNull: true,
      defaultValue: "",
      comment: "视频封面",
    },
    category_id: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: "分类id",
    },
    user_id: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: "用户id",
    },
    duration: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: "总时长",
    },
    desc: {
      type: TEXT,
      allowNull: false,
      defaultValue: "",
      comment: "视频描述",
    },
    created_time: {
      type: DATE,
      get() {
        return (new Date(this.getDataValue("created_time"))).getTime();
      },
    },
    play_count: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: "播放量",
    },
    danmu_count: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: "弹幕量",
    },
    updated_time: DATE,
  });

  // 关联关系
  Video.associate = function (models) {
    // 关联作者
    Video.belongsTo(app.model.User);
    // 关联子视频
    Video.hasMany(app.model.VideoDetail);
  };

  return Video;
};

// app/model/video_detail.js
module.exports = (app) => {
  const { STRING, INTEGER, DATE, ENUM, TEXT } = app.Sequelize;

  const VideoDetail = app.model.define("video_detail", {
    id: {
      type: INTEGER(20),
      primaryKey: true,
      autoIncrement: true,
    },
    title: {
      type: STRING(100),
      allowNull: false,
      defaultValue: "",
      comment: "子标题",
    },
    video_id: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: "视频id",
    },
    url: {
      type: STRING,
      allowNull: true,
      defaultValue: "",
      comment: "视频链接",
    },
    desc: {
      type: TEXT,
      allowNull: false,
      defaultValue: "",
      comment: "子描述",
    },
    created_time: DATE,
    updated_time: DATE,
  });

  // 关联关系
  VideoDetail.associate = function (models) {
    // 关联视频
    VideoDetail.belongsTo(app.model.Video);
  };

  return VideoDetail;
};

// app/model/video_play.js
module.exports = (app) => {
  const { STRING, INTEGER, DATE, ENUM, TEXT } = app.Sequelize;

  const VideoPlay = app.model.define("video_play", {
    id: {
      type: INTEGER(20),
      primaryKey: true,
      autoIncrement: true,
    },
    ip: {
      type: STRING(50),
      allowNull: false,
      defaultValue: 0,
      comment: "ip地址",
    },
    video_id: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: "视频id",
    },
    created_time: DATE,
    updated_time: DATE,
  });

  return VideoPlay;
};

数据表设计和迁移 ​

数据表设计和迁移