CODEWITHSUNDEEP
apitestinggraphqlpostman
Rsaleh
Rsaleh

Reputation: 87

How to run GraphQL request in Pre-Request Script section in postman?

I want to run a query before the actual request runs and get a value from the pre-request response and set it in a collection variable. I have a problem running the following as I used to do it while testing REST APIs.

This is what I tried to do

const getUserBeforeUpdate = {
  url: pm.environment.get("base-url"),
  method: 'POST',
  header: {
   'content-type': 'application/json',
   'Authorization': `Bearer ${pm.environment.get("token")}`},
  body: JSON.stringify({query: '{ user { profile {id} } }'})
};
 
 pm.sendRequest(getUserBeforeUpdate, function(err, response) {
    pm.expect(response.code).to.eql(200);
   
    // set collection variable from the response
 });

but I get a console error stating

There was an error in evaluating the Pre-request Script:  Error: Unexpected token u in JSON at position 0

What's the right way to chain requests in graphql?

Upvotes: 1

Views: 2884

Answers (3)

Evgenii Grebeniuk
Evgenii Grebeniuk

Reputation: 31

Collection variable are accessible via collectionVariables. This should work for you:

const getUserBeforeUpdate = {
  url: pm.collectionVariables.get("base-url"),
  method: 'POST',
  header: {
   'content-type': 'application/json',
   'Authorization': `Bearer ${pm.collectionVariables.get("token")}`},
  body: JSON.stringify({query: '{ user { profile {id} } }'})
};
 
 pm.sendRequest(getUserBeforeUpdate, function(err, response) {
    pm.expect(response.code).to.eql(200);
   
    // set collection variable from the response
 });

Upvotes: 3

Danny Dainton
Danny Dainton

Reputation: 25921

I don't have the ability to run you request but would this work?

const getUserBeforeUpdate = {
    url: `${pm.environment.get("base-url")}`,
    method: 'POST',
    header: {
        'content-type': 'application/json',
        'Authorization': `Bearer ${pm.environment.get("token")}`},
    body: JSON.stringify({
        query: 'query { user { profile { id } } }'
    })
};
 
 pm.sendRequest(getUserBeforeUpdate, function(err, response) {
    pm.expect(response.code).to.eql(200);
    // set collection variable from the response
 });

Upvotes: 0

Rsaleh
Rsaleh

Reputation: 87

I was able to fix this by changing the url value to the actual url directly as a string. I'm not sure why getting the variable from environment didn't work yet.

Upvotes: -1

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