我构建了一个与gqlgen的“Getting Started”教程极为相似的简单GraphQL API。我可以使用curl成功查询它。但是我无法正确获取有关突变的curl请求。

schema.graphql:

type Screenshot {
  id: ID!
  url: String!
  filename: String!
  username: String!
  description: String
}

input NewScreenshot {
  id: ID!
  url: String!
  filename: String!
  username: String!
  description: String
}

type Mutation {
  createScreenshot(input: NewScreenshot!): Screenshot!
  deleteScreenshot(id: ID!): String!
}

type Query {
  screenShots(username: String!): [Screenshot!]!
}

models_gen.go:
type NewScreenshot struct {
    ID          string  `json:"id"`
    URL         string  `json:"url"`
    Filename    string  `json:"filename"`
    Username    string  `json:"username"`
    Description *string `json:"description"`
}

type Screenshot struct {
    ID          string  `json:"id"`
    URL         string  `json:"url"`
    Filename    string  `json:"filename"`
    Username    string  `json:"username"`
    Description *string `json:"description"`
}

resolver.go:
func (r *mutationResolver) CreateScreenshot(ctx context.Context, input NewScreenshot) (Screenshot, error) {
    id, err := uuid.NewV4()
    shot := Screenshot{
        ID:          id.String(),
        Description: input.Description,
        URL:         input.URL,
        Filename:    input.Filename,
        Username:    input.Username,
    }

    return shot, nil
}

我试过了:
  • 遍历gqlgen documentationGraphQL schemaHow to GraphQL以及thisthis等几个示例。并进行了1.5天的谷歌搜索。
  • 在我的curl请求中,排列很多很多不同的形状。这似乎是最接近的:
    curl -v http://localhost:8080/query
    -H "Content-Type: application/json"
    -d '{ "query":
        { "createScreenshot":
            {"username": "Odour",
             "url": "google.com",
             "description": "just another screenshot",
             "filename": "testimage"
            }
        }
    }'
    

    但是它失败了:
    * timeout on name lookup is not supported
    *   Trying ::1...
      % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
      0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* Connected to localhost (::1) port 8080 (#0)
    > POST /query HTTP/1.1
    > Host: localhost:8080
    > User-Agent: curl/7.47.1
    > Accept: */*
    > Content-Type: application/json
    > Content-Length: 146
    >
    } [146 bytes data]
    * upload completely sent off: 146 out of 146 bytes
    < HTTP/1.1 400 Bad Request
    < Date: Sat, 19 Jan 2019 21:00:15 GMT
    < Content-Length: 149
    < Content-Type: text/plain; charset=utf-8
    <
    { [149 bytes data]
    100   295  100   149  100   146    149    146  0:00:01 --:--:--  0:00:01  145k{"errors":[{"message":"json body could not be decoded: json: cannot unmarshal object into Go struct field params.query of type string"}],"data":null}
    * Connection #0 to host localhost left intact
    

  • 帮助?

    最佳答案

    JSON有效负载中的query的值必须是包含GraphQL查询的字符串,而不是您正在使用的对象,例如:

    $ curl \
      -H "Content-Type: application/json" \
      -d '{ "query": "mutation { createScreenshot(input: { username: \"Odour\" }) { id } }" }' \
      http://localhost:8080/query
    

    请注意,您需要对查询字符串中的双引号进行转义。

    10-08 05:41
    查看更多