Question

我只是从graph.cool开始，我试图在graph.cool的帮助下建立一个graphql数据模态。似乎我们总是需要进行两种方式的绑定。例如User -> Posts or Posts -> User.

我做了一个这样的结构：

type User @model {
  id: ID! @isUnique
  name: String
  cart: Cart @relation(name: "UserCart")
}
type Category @model {
  id: ID! @isUnique
  name: String!
  image: String
  description: String
  subCategories: [SubCategory!]! @relation(name: "CategoriesSubCategories")
}
type SubCategory @model {
  id: ID! @isUnique
  name: String!
  products: [Product!]! @relation(name: "SubCategoryProduct")
  category: Category! @relation(name: "CategoriesSubCategories")
}

type Product @model {
  id: ID! @isUnique
  name: String
  image: String
  description: String
  basePrice: Int
  subCategory: SubCategory @relation(name: "SubCategoryProduct")
}

type Cart @model {
  id: ID! @isUnique
  cartItems: [CartItem!]! @relation(name: "CartItems")
  user: User! @relation(name: "UserCart")
}

type CartItem @model {
  id: ID! @isUnique
  quantity: Int
  #i need to do two way binding for this
  product: Product @relation(name: "CartItemProduct")
  # -----
  cart: Cart! @relation(name: "CartItems")
}

一切都如预期。但是当我创建购物车项目时，它具有产品的属性，并且我不知道如何将其与创建购物车的用户联系起来。帮助将不胜感激。

CartItem
    ✖ A relation directive with a name must appear exactly 2 times. Relation name: 'CartItemProduct'

graph.cool双向绑定

0 个答案: