GraphQL post request in axios

问题:

I have a problem with GraphQL. I want to send axios.post request to my server. I can do it in postman:

{
    "query":"mutation{updateUserCity(userID: 2, city:\"test\"){id name age city knowledge{language frameworks}}} "
}

and in graphiql:

mutation {
  updateUserCity(userID: 2, city: "test") {
    id
    name
    age
    city
    knowledge {
      language
      frameworks
    }
  }
}

but can't do it in my code:(( here is my code snippet:

const data = await axios.post(API_URL, {
  query: mutation updateUserCity(${ id }: Int!, ${ city }: String!) {
    updateUserCity(userID: ${ id }, city: ${ city }){
      id
      name
      age
      city
      knowledge{
        language
        frameworks
      }
    }
  }
}, {
    headers: {
      'Content-Type': 'application/json'
    }
  })

what's wrong in my code?

回答1:

Value of query parameter to be passed in request has to be string and names of variables passed to GraphQL queries should be prefixed by $. You have used string literals for variables in request instead. Also, variables can be passed in post request using variables key.

Changing your code to something like below should get it to working:

const data = await axios.post(API_URL, {
  query: `mutation updateUserCity($id: Int!, $city: String!) {
    updateUserCity(userID: $id, city: $city){
      id
      name
      age
      city
      knowledge{
        language
        frameworks
      }
    }
  }`,
  variables: {
    id: 2,
    city: 'Test'
  }
}, {
    headers: {
      'Content-Type': 'application/json'
    }
  })

回答2:

It seems you're trying to pass variables into the query. Unless I'm wrong, what you have in the axios call and the others are different.

const data = await axios.post(API_URL, {
  query: `
    updateUserCity(userID: ${id}, city:${city}){
      id
      name
      age
      city
      knowledge{
        language
        frameworks
      }
    }
  `
}, {
  headers: {
    'Content-Type': 'application/json'
  }
});

I believe this should work, assuming you have the variables id and city defined before this call.

回答3:

i would like to share you my simple working example

            let id = "5c9beed4a34c1303f3371a39";
            let body =  { 
                query: `
                    query {
                        game(id:"${id}") {
                            _id
                            title
                        }
                    }
                `, 
                variables: {}
            }
            let options = {
                headers: {
                    'Content-Type': 'application/json'
                }
            }
            axios.post('http://localhost:3938/api/v1/graphql',body, options)
                .then((response)=>{
                    console.log(response);
                });