修改管理后台

backend/models/CattleUser.js

@@ -0,0 +1,45 @@
+const { DataTypes } = require('sequelize');
+const BaseModel = require('./BaseModel');
+
+/**
+ * 牛只用途模型
+ */
+class CattleUser extends BaseModel {
+  static init(sequelize) {
+    return super.init({
+      id: {
+        type: DataTypes.INTEGER,
+        primaryKey: true,
+        comment: '用途ID'
+      },
+      name: {
+        type: DataTypes.STRING(100),
+        allowNull: false,
+        comment: '用途名称'
+      },
+      description: {
+        type: DataTypes.TEXT,
+        allowNull: true,
+        comment: '用途描述'
+      }
+    }, {
+      sequelize,
+      modelName: 'CattleUser',
+      tableName: 'cattle_user',
+      comment: '牛只用途表',
+      timestamps: true,
+      createdAt: 'created_at',
+      updatedAt: 'updated_at'
+    });
+  }
+
+  static associate(models) {
+    // 一个用途可以有多个牛只
+    this.hasMany(models.IotCattle, {
+      foreignKey: 'user_id',
+      as: 'cattle'
+    });
+  }
+}
+
+module.exports = CattleUser;