{
  "bsonType": "object",
  "required": ["goods_id", "sku_id", "amount"],
  "permission": {
    "read": true,
    "create": true,
    "update": "doc.user_id == auth.uid",
    "delete": "doc.user_id == auth.uid"
  },
  "properties": {
    "_id": {
      "description": "存储文档 ID（SKU ID），系统自动生成"
    },
    "goods_id": {
      "bsonType": "string",
      "description": "商品 id，参考 opendb-mall-goods 表",
      "foreignKey": "opendb-mall-goods._id"
    },
    "goods_name": {
      "bsonType": "string",
      "description": "商品名称"
    },
    "sku_id": {
      "bsonType": "string",
      "description": "SKU ID",
      "foreignKey": "opendb-mall-sku._id"
    },
    "sku_name": {
      "bsonType": "string",
      "description": "SKU名称，多个组合>"
    },
    "price": {
      "bsonType": "int",
      "description": "价格/规格价格，以分为单位，避免浮点计算的精度问题"
    },
    "shop_id": {
      "bsonType": "string",
      "title": "店铺",
      "foreignKey": "tian-mall-shops._id"
    },
    "market_price": {
      "bsonType": "int",
      "description": "市场价，以分为单位，避免浮点计算的精度问题"
    },
    "goods_thumb": {
      "bsonType": "string",
      "description": "商品缩略图，加入购物车时候的商品图、型号图，防止商品删除",
      "title": "缩略图地址",
      "pattern": "^(http:\/\/|https:\/\/|\/|.\/|@\/)\\S",
      "trim": "both"
    },
    "amount": {
      "bsonType": "int",
      "description": "数量"
    },
    "create_date": {
      "bsonType": "timestamp",
      "description": "创建时间",
      "defaultValue": {
        "$env": "now"
      }
    },
    "update_date": {
      "bsonType": "timestamp",
      "description": "修改时间",
      "defaultValue": {
        "$env": "now"
      }
    },
    "user_id": {
      "bsonType": "string",
      "description": "用户uid，参考 uni-id-users 表",
      "foreignKey": "uni-id-users._id",
      "defaultValue": {
        "$env": "uid"
      }
    }
  }
}