Graphql post body “Must provide query string.”

问题

I use Express-graphql middleware. I send the following request in the body line:

POST /graphql HTTP/1.1
Host: local:8083
Content-Type: application/graphql
Cache-Control: no-cache
Postman-Token: d71a7ea9-5502-d5fe-2e36-0ae49c635a29

{
   testing {
      pass(id: 1) {
        idn
      }
    }
}

and have error

{
  "errors": [
    {
      "message": "Must provide query string."
    }
  ]
}

in graphql i can send update in URL.

URL string is too short. i must send update model like

mutation {
  update(id: 2, x1: "zazaza", x2: "zazaza", x3: "zazaza" ...(more more fields)...) {
    idn
  }
}

i think its must be in request body. How can i send 'update' query or that i'm doing wrong?

回答1:

Post request needs to manage headers info.

Using Http client: Content-Type application/json
Using Postman client: Content-Type application/graphql

but request body looks like string

{"query":"mutation{update(id:1,x1:\"zazaz\",x2:\"zazaz\"......){id x1 x2}}"}

回答2:

If you are using graphql and want to test it using postman or any other Rest client do this.

In postman, select POST method and enter your URL and set Content-Type as application/graphql then pass your query in the body.

Example:

http://localhost:8080/graphql
Mehtod: POST
Content-Type: application/graphql
Body: 
  query{
    FindAllGames{
    _id
    title
    company
    price
    year
    url
   }
 }

Thats it you will get the response.

回答3:

Using Postman Version 7.2.2 I had a similar issue. This version of Postman supports Graphql out of the box. Changing the Content-type to application/json fixed it for me. Image showing the Content-type in Postman

回答4:

Switch content type to JSON. Like this see Postman image

来源：https://stackoverflow.com/questions/36691554/graphql-post-body-must-provide-query-string

标签

express

graphql

graphql-js