Directives and astNode

[rostislavv]

Describe the Bug
When using graphql-modules with type-graphql and @Directive decorator functionality - unexpected behaviour was spotted.

It turned down to printSchemaWithDirectives function from graphql-tools.
Specifically this and this place.
It seems that astNode representation in type-graphql has slight mismatch between one produced by makeExecutableSchema, affecting (in this case) type-graphql and graphql-modules integration (specifically for directives).

To Reproduce
It has the following effect - directives on type and on input are present, but on their fields - they are lost.

1. Case of type Query:
   

where result was created by makeExecutableSchema (from graphql-tools also), and buildedSchema was created by buildSchemaSync.
In this case type-graphql's version don't have astNode for type Query. Thus this place is omitted (due to undefined) and fields of type Query lost their directives meta. This probably will take place for type Mutation, and for type Subscription too.

2. Custom type case:
   
   in type-graphql's version there are no astNode.fields - which prevents this part of handling directives.

Expected Behavior
astNode of type and root types exists, and it provides fields (if present) to avoid directives lost in case of usage with other libraries (this affects graphql-tools and graphql-modules, but might affect others, if they are using graphql-tools).

If you agree with this change - i'll try to prepare PR.

[MichalLytek]

If you agree on this change - i'll try to prepare PR.

I'm not sure what is the issue you're describing but sure, you can try to illustrate that with a PR 😉

[harm-less]

It seems like I'm having the same issue. Though it took me some time to figure out where the issue is located 😅

At first I thought the issue was happening withgraphql-modules, but that doesn't seem be the case. I tried the first script from this issue graphql-hive/graphql-modules#453 and that worked like a charm. So directives worked in graphql-modules.

When I tried to alter this script by adding the types using type-graphql the directive wasn't triggered, presumably due to the issue described above.

When I skipped my GraphQL Modules and directly build my schema using Type-Graphql alone, my directives worked. So I can definitely confirm that the combination between GraphQL-Modules (or graphql-tools as was mentioned) and Type-GraphQL is what makes my code fail.

@rostislavv did you manage to fix or workaround the issue by any change?
And you said you are able to make a PR? Because I don't know where to begin and I'd love to continue using Type-GraphQL.

[MentalGear]

@rostislavv @harm-less Did you manage to start on a PR?

[MichalLytek]

@MentalGear

I'm not sure what is the issue you're describing