Add DirectivesMiddleware to Django

[patrick91]

Currently directives are not working when using the Django view, like we have done for the ASGI app:

92d8f5d#diff-d6a364f593ab251cd7ee3024456f07f5R17-R44

[parikshitgupta1]

Are the directives active now?
92d8f5d#diff-d6a364f593ab251cd7ee3024456f07f5R17-R44

####middelware.py
Duplicate of #
`from .directive import DIRECTIVE_REGISTRY

class DirectivesMiddleware:
def resolve(self, next_, root, info, **kwargs):
result = next_(root, info, **kwargs)

    for directive in info.field_nodes[0].directives:
        directive_name = directive.name.value

        func = DIRECTIVE_REGISTRY.get(directive_name)

        arguments = {
            argument.name.value: argument.value.value
            for argument in directive.arguments
        }

        result = func(result, **arguments)

    return result`

[patrick91]

@parikshitgupta1 no :) the execute function linked there is only used in the ASGI middleware, but not in django, see here:

https://github.com/strawberry-graphql/strawberry/blob/master/strawberry/contrib/django/views.py#L52

we need to make a custom graphql_sync I think :)

[un33k]

@patrick91 please have in mind that Django 3.0 is around the corner. With full async support, as per their roadmap

[patrick91]

@un33k I think django 3.0 won't support async views. Support for that will arrive later :)

[patrick91]

This has been done for a while, closing :D