Graphql post body "Must provide query string."

Question

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?

"in graphql i can send update in URL." <-- Do you mean `graphiql`? — Ahmad Ferdous, Apr 18 '16 at 22:36
you need to change "Content type" in postman's headers to "application/json" and in request body use "GraphQL" tab with "query" and "graphql variables" — Vaha, Nov 13 '19 at 09:39

score 67 · Accepted Answer · edited Sep 20 '22 at 14:33

67

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}}"}

edited Sep 20 '22 at 14:33

wowkin2

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answered Apr 19 '16 at 07:54

Gopard

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score 13 · Answer 2 · answered Apr 26 '17 at 12:07

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.

what is that request tester you are using? – Jonathan Sep 01 '18 at 11:57 — Jonathan, Sep 01 '18 at 11:57

score 7 · Answer 3 · edited Jul 21 '21 at 15:59

7

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

edited Jul 21 '21 at 15:59

smac89

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answered Jul 13 '19 at 09:56

gbengaoyetade

700
8
6

score 6 · Answer 4 · edited Sep 19 '21 at 09:45

6

This generally occurs when your 'express-graphql' doest receive any params. You need to added a json/applicaton parser in your application.

npm install body-parser

eg -

const bodyParser = require('body-parser');

app.use(bodyParser.json()); // application/json

edited Sep 19 '21 at 09:45

Jeff Tian

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answered Apr 19 '20 at 11:09

Shivam Pandey

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where the hell does bodyParser come from, common, be thorough here, what lib? – PositiveGuy Oct 27 '20 at 02:24
@PositiveGuy, you can `npm install body-parser --save` and then `import bodyParser from 'body-parser'`; – Jeff Tian Sep 19 '21 at 09:44

score 5 · Answer 5 · edited Jul 21 '21 at 15:49

5

for me worked like as following:

In the body

Body postman

In the Headers

Header postman

Don't forget mark GraphQl [x] on Body settings

enter image description here

And how was quoted before changes the verb to POST.

edited Jul 21 '21 at 15:49

smac89

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answered Apr 22 '21 at 23:11

Crystyan S. Santos

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you saved my day! – OSMQuote Oct 15 '21 at 17:43
1

POST was what I was missing on mine. Thanks - saved the day for me too! – Stephen O'Leary May 01 '22 at 03:55

score 3 · Answer 6 · answered May 03 '21 at 17:18

3

go to the relevant web page and open "inspect" (by write click -> inspect || Ctrl+Shift+I in chrome)
go to the network tab and copy the cURL command
open the postman ,then import -> raw text
paste the copied command
then,continue ->

answered May 03 '21 at 17:18

janadari ekanayaka

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This works fine and should be the easiest!!! – Amila Viraj Sep 15 '22 at 04:43
Thanks, your menthod helped me to find a root cause of the issue: https://stackoverflow.com/a/73788400/3722635 – wowkin2 Sep 20 '22 at 14:34

score 1 · Answer 7 · edited Jul 21 '21 at 15:59

1

Switch content type to JSON. Like this see Postman image

edited Jul 21 '21 at 15:59

smac89

39,374
15
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answered Dec 04 '18 at 22:20

1

Please provide some comment for your answer. – Matthieu Brucher Dec 04 '18 at 22:44
its not JSON. its only "query" : "graphQL query string", its not correct. We must send valid JSON but cant do this – Gopard Dec 06 '18 at 10:27

score 1 · Answer 8 · answered Sep 20 '22 at 14:30

1

Check if you are using correct protocol in your Postman requests.

I used HTTP instead of HTTPS and this caused the same error.

Changes of content-type, raw or json instead of graphql type didn't help.

answered Sep 20 '22 at 14:30

wowkin2

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Graphql post body "Must provide query string."

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