Implement toString() to support graphql.js

[Pokute]

Issue Labels

• has-reproduction
• feature
• [] docs
• blocking
• good first issue

/label graphql.js

graphql-tag claims to be a utility for graphql, but doesn't have any indication on how to use it with graphql package. Sure enough the result from graphql-tag might be valid AST, but the I don't think that the specifications really make any mention of queries being in AST format. Graphql doesn't support gql objects as query parameter.

const someQuery = gql`
  query { something { else } }
`

console.log(someQuery.toString()); // "[object Object]"
graphql(schema, someQuery); // Fails.

someQuery.toString() = function() { return this.loc.source; };
console.log(someQuery.toString()); // Proper query string.
graphql(schema, someQuery); // Works.

This should be really easy to implement with the objects returned by the template stringy adding a custom toString() -function to them. Currently the default is always returns "[object Object]".

If above change is unacceptable, there should be documentation how to properly retrieve the query in string form.

[darren128]

@Pokute See #214

Still trying to get it merged....

[dobesv]

I think you can get the input source code from loc.source.body:

require('graphql-tag').default('query { test }').loc.source.body

[balazsorban44]

https://github.com/nhi/graphql-operations-string-loader

If someone is interested, I created a loader that puts out named exports of each operation from a graphql file as strings.

In case of a single operation per file, it will also alias it to the default export

[rizky]

I think it would be safer to just use

import { print } from 'graphql/language/printer'

https://stackoverflow.com/questions/63034980/graphqlerror-there-can-be-only-one-fragment-named