RuntimeError "There is no current event loop in thread" if not on main Thread

[redreceipt]

I'm getting an error using the basic example syntax. You mention a warning below on the README and if this is it, I apologize, but I'm not familiar enough with AsyncIO to connect the dots.

My code:

class GraphQLClient:

    transport = AIOHTTPTransport(url="https://fake.com/graphql")
    client = Client(transport=transport, fetch_schema_from_transport=True)

    def request(self, body):
        return self.client.execute(body)

client = GraphQLClient()
r = client.request(
    gql(
    """
    query getUserID {
      login( email_or_phone_or_username: "{username}" password:"{pw}") {
        user_id
      }
    }
    """
    )
 )

The error:

  File "/Users/michael/Documents/Projects/kpffl/sleeper.py", line 16, in request
    return self.client.execute(body)
  File "/Users/michael/Documents/Projects/kpffl/venv/lib/python3.8/site-packages/gql/client.py", line 113, in execute
    loop = asyncio.get_event_loop()
  File "/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/python3.8/asyncio/events.py", line 639, in get_event_loop
    raise RuntimeError('There is no current event loop in thread %r.'
RuntimeError: There is no current event loop in thread 'Thread-8'.

[leszekhanusz]

You mention a warning below on the README and if this is it

No, it is something else. Your code is working for me.

Are you on a Mac ?
Are you using this code inside a new Thread ?

[leszekhanusz]

Could you try to add before:

import asyncio
asyncio.set_event_loop(asyncio.new_event_loop())

[redreceipt]

That may have worked. Now I'm getting a different error:

TypeError: Invalid or incomplete introspection result. Ensure that you are passing the 'data' attribute of an introspection response and no 'errors' were returned alongside: None.

I'm running inside a Flask instance which I believe is multi-threaded, could that be why I needed to add the asyncio line?

[leszekhanusz]

I'm running inside a Flask instance which I believe is multi-threaded, could that be why I needed to add the asyncio line?

Yes, we should fix this.

For your next error, it means that the introspection query to fetch the schema failed. I will need more info.
Could you please try fetch_schema_from_transport=False ?

EDIT: which backend are your using?
EDIT2: could you please catch the Exception and print (client.introspection) to see what was received for the introspection query

[redreceipt]

I modified slightly with this code:

class GraphQLClient:
    def __init__(self):
        asyncio.set_event_loop(asyncio.new_event_loop())
        transport = AIOHTTPTransport(url="https://cool.api/graphql")
        self.client = Client(transport=transport, fetch_schema_from_transport=True)
        print(self.client.introspection)

    def request(self, body):
        return self.client.execute(body)

but client.introspection comes back None

[redreceipt]

EDIT: which backend are you using?

Flask

[leszekhanusz]

The schema is not fetched directly with async transports but only when doing the first execute. Could you try something like this:

    def request(self, body):
        try:
            result = self.client.execute(body)
        except:
            print(self.client.introspection)

        return result

[leszekhanusz]

Also Flask is a standard web server, it does not support GraphQL by default. Do you use something else like Flask-GraphQL.
Or did you implement all the backend yourself directly using Flask ?

[leszekhanusz]

And what result do you have with fetch_schema_from_transport=False:

client = Client(transport=transport, fetch_schema_from_transport=False)

[redreceipt]

The schema is not fetched directly with async transports but only when doing the first execute. Could you try something like this:

    def request(self, body):
        try:
            result = self.client.execute(body)
        except:
            print(self.client.introspection)

        return result

    def request(self, body, variables=None):
        try:
            return self.client.execute(body, variable_values=variables)
        except:
            print(self.client.introspection)

still shows self.client.introspection being None

[redreceipt]

Also Flask is a standard web server, it does not support GraphQL by default. Do you use something else like Flask-GraphQL.
Or did you implement all the backend yourself directly using Flask ?

It's not my GraphQL server, it's a functioning third-party GQL server. It's just making calls from my Flask site acting as the client to their server.

[leszekhanusz]

Sorry my question about the backend was about the GraphQL backend, do you know which type of backend is used on this GraphQL server ?