查询

这是 GraphQL 库版本 7 的文档。对于长期支持 (LTS) 版本 5，请参阅 GraphQL 库版本 5 长期支持版。

类型定义

本页中的查询假设采用以下类型定义

type Post @node {
    id: ID! @id
    content: String!
    creators: [User!]! @relationship(type: "HAS_POST", direction: IN, properties: "PostedAt")
    createdAt: DateTime!
}

type User @node {
    id: ID! @id
    name: String!
    age: Int!
    posts: [Post!]! @relationship(type: "HAS_POST", direction: OUT, properties: "PostedAt")
    friends: [User!]! @relationship(type: "FRIENDS_WITH", direction: OUT)
}

type PostedAt @relationshipProperties {
    date: DateTime
}

为此生成以下查询字段

type Query {
  postsConnection(first: Int, after: String, where: PostWhere, sort: [PostSort!]): PostsConnection!
  posts(where: PostWhere, limit: Int, offset: Int, sort: [PostSort!]): [Post!]!
  usersConnection(first: Int, after: String, where: UserWhere, sort: [UserSort!]): UsersConnection!
  users(where: UserWhere, limit: Int, offset: Int, sort: [UserSort!]): [User!]!
}

编写查询

根据类型定义，以下是两个如何编写查询以读取或检索值的示例

根据 ID 和名称返回所有用户节点
query {
    users {
        id
        name
    }
}
查询名为“Jane Smith”的用户及其帖子
query {
  users(where: { name: { eq: "Jane Smith" } }) {
    id
    name
    posts {
      content
    }
  }
}
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