How to convert JSON format of data to GraphQL query format

Question

I have a Json object and want to convert it to graphql query in order to post a request on graphql api. Can any one please provide any pointer to it as I am not able to proceed.

JSON object extracted from the POJO:
{
  "customer": {
     "idFromSource": "123", 
     "title": "Mrs", 
     "dateOfBirth": "1980-11-11"
  }
}

graphql query that I need to hit a post request:
{
  "query": "mutation {updateCustomer(customer: 
                    {idFromSource: \"123\", 
                    title: \"Mrs\", 
                    dateOfBirth: \"1980-11-11\"})
                     {idFromSource title dateOfBirth}}"
}

Answer 1

Declare the input as a variable in your query. Queries should be static . That means you never generate GraphQL code on the client. If you are doing that you are probably doing something wrong. I am not sure which frontend technology you are using but here is your query using JavaScript fetch:

let json = // ... parsed JSON

let query = `
  mutation customerMutation($customer: CustomerInput) { # Adjust typename
    updateCustomer(customer: $customer) {
      idFromSource
      title
      dateOfBirth
    }
  }
`;

fetch('/graphql', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  data: JSON.stringify({
    query,
    variables: { customer: json.customer }
  }),
});

The trick is that there is a type on the GraphQL API (I have here assumed it is called CustomerInput , please adjust it in the mutation) that has the same shape as your JSON object. The server will therefore happily accept the whole JSON object as a value for the $customer variable in the mutation. No conversion needed!