Question

我刚刚开始研究GraphQL，我想知道是否有一种方法可以过滤没有任何节点的结果。这是一个相对简单的示例查询：

query { 
  organization(login:"GitHub") { 
    repositories(first: 20) {
      edges {
        node {
          name
          pullRequests(first: 5, states: OPEN){
            edges {
              node {
                title
                author{
                  login
                }
                updatedAt
              }
            }
          }
        }
      }
    }
  }
}

这是查询返回的结果的子集：

{
  "data": {
    "organization": {
      "repositories": {
        "edges": [
          {
            "node": {
              "name": "gitignore",
              "pullRequests": {
                "edges": [
                  {
                    "node": {
                      "title": "Create new CodeComposerStudio.gitignore",
                      "author": {
                        "login": "wolf99"
                      },
                      "updatedAt": "2017-07-26T20:31:53Z"
                    }
                  },
                  {
                    "node": {
                      "title": "Create PVS.gitignore",
                      "author": {
                        "login": "cesaramh"
                      },
                      "updatedAt": "2017-05-01T19:42:07Z"
                    }
                  },
                  {
                    "node": {
                      "title": "gitignore for Magic Software Enterprises product xpa ",
                      "author": {
                        "login": "tommes"
                      },
                      "updatedAt": "2017-05-01T19:41:53Z"
                    }
                  },
                  {
                    "node": {
                      "title": "Create PSoC.gitignore",
                      "author": {
                        "login": "dbrwn"
                      },
                      "updatedAt": "2017-05-01T19:41:39Z"
                    }
                  },
                  {
                    "node": {
                      "title": "add ThinkPHP gitignore file",
                      "author": {
                        "login": "swumao"
                      },
                      "updatedAt": "2017-05-01T19:40:53Z"
                    }
                  }
                ]
              }
            }
          },
          {
            "node": {
              "name": "dmca",
              "pullRequests": {
                "edges": []
              }
            }
          }
        ]
      }
    }
  }
}

所以我想知道是否有一种方法可以修改我的查询，以使它不会返回名为dmca的节点，因为pullRequests上没有边。

Answer 1

如果您使用的是githubs graphql api，则似乎无法过滤这些边缘，但是，如果您要实现graphql服务器，则可以知道边缘节点是什么，从而在边缘解析器中对其进行过滤

Answer 2

根据GitHub repositories文档，不允许进行这种过滤。

first: Int
Returns the first n elements from the list.

after: String
Returns the elements in the list that come after the specified cursor.

last: Int
Returns the last n elements from the list.

before: String
Returns the elements in the list that come before the specified cursor.

privacy: RepositoryPrivacy
If non-null, filters repositories according to privacy

orderBy: RepositoryOrder
Ordering options for repositories returned from the connection

affiliations: [RepositoryAffiliation]
Affiliation options for repositories returned from the connection

isLocked: Boolean
If non-null, filters repositories according to whether they have been locked

isFork: Boolean
If non-null, filters repositories according to whether they are forks of another repository

所以我认为这是不可能的。

如何通过无边的后代过滤GraphQL结果？

2 个答案: