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Clarify Graphene v3 upgrade with an example #90

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16 changes: 14 additions & 2 deletions docs/flask.md
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Expand Up @@ -41,7 +41,19 @@ This will add `/graphql` endpoint to your app and enable the GraphiQL IDE.

### Special Note for Graphene v3

If you are using the `Schema` type of [Graphene](https://github.com/graphql-python/graphene) library, be sure to use the `graphql_schema` attribute to pass as schema on the `GraphQLView` view. Otherwise, the `GraphQLSchema` from `graphql-core` is the way to go.
If you are using the `Schema` type of [Graphene](https://github.com/graphql-python/graphene) library, be sure to use the `graphql_schema` attribute to pass as schema on the `GraphQLView` view. For example:
```diff
app.add_url_rule(
'/graphql',
view_func=GraphQLView.as_view(
'graphql',
- schema=graphene_schema,
+ schema=graphene_schema.graphql_schema,
)
)
```

If you aren't using Graphene's `Schema`, `GraphQLSchema` from `graphql-core` is the way to go.

More info at [Graphene v3 release notes](https://github.com/graphql-python/graphene/wiki/v3-release-notes#graphene-schema-no-longer-subclasses-graphqlschema-type) and [GraphQL-core 3 usage](https://github.com/graphql-python/graphql-core#usage).

Expand Down Expand Up @@ -79,4 +91,4 @@ class UserRootValue(GraphQLView):
```

## Contributing
See [CONTRIBUTING.md](../CONTRIBUTING.md)
See [CONTRIBUTING.md](../CONTRIBUTING.md)