Build powerful, efficient, and flexible GraphQL APIs with seamless Django integration.
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Steven DeMartini f67c5dbc8c Revert field resolver logic to fix poor query performance
This reverts the change to `convert_field_to_djangomodel` introduced in
https://github.com/graphql-python/graphene-django/pull/1315 for the
reasons discussed here
https://github.com/graphql-python/graphene-django/pull/1315/files#r1015659857.
As mentioned there, without reverting this code, "queries are forced
every time an object is resolved, making an exponential number of
queries when nesting without any possibility of optimizing".

That regression prevented `graphene-django-optimizer` from working with
`graphene-django` v3.0.0b9+ (where this change first was published), as
discussed in
https://github.com/graphql-python/graphene-django/issues/1356#issuecomment-1284718187,
https://github.com/tfoxy/graphene-django-optimizer/issues/86, and
https://github.com/tfoxy/graphene-django-optimizer/pull/83#issuecomment-1451987397.

For now, this marks the two tests that depended on this problematic code
as "expected to fail", and perhaps they can be reintroduced if there's a
way to support this logic in a way that does not prevent
`select_related` and `prefetch_related` query-optimization and introduce
nested N+1s.

As mentioned here
https://github.com/graphql-python/graphene-django/pull/1315#issuecomment-1468594361,
this is blocking upgrade to graphene-django v3 for many users, and
fixing this would allow many to begin upgrading and contributing to keep
graphene-django going.
2023-05-03 11:37:17 +03:00
.github 👷 Add pre-commit (#1336) 2022-10-19 17:10:30 +03:00
bin Isolated Graphene Django in a new package 2016-09-17 16:31:17 -07:00
docs Update filtering.rst 2023-04-26 22:46:40 +03:00
examples Clarify cookbook example READMEs 2022-11-15 09:56:28 +03:00
graphene_django Revert field resolver logic to fix poor query performance 2023-05-03 11:37:17 +03:00
.coveragerc Improved python syntax and sorts (pep8). Improved Readme 2016-09-17 17:09:56 -07:00
.gitignore Added tox.ini 2019-05-22 01:49:52 +01:00
.pre-commit-config.yaml Update pre-commit tools (#1364) 2022-11-23 01:16:14 +03:00
CODE_OF_CONDUCT.md Create CODE_OF_CONDUCT.md 2019-05-06 13:28:02 +01:00
CONTRIBUTING.md 👷 Add pre-commit (#1336) 2022-10-19 17:10:30 +03:00
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README.md Django v4, python 3.10 support for graphene-django v3 (#1281) 2022-01-07 20:26:07 +00:00
README.rst WIP: Merge master into v3 (#1086) 2020-12-30 15:37:57 -08:00
setup.cfg 👷 Add pre-commit (#1336) 2022-10-19 17:10:30 +03:00
setup.py Fixes related to pr#1412 (#1352) 2022-09-24 15:50:40 +03:00
tox.ini import error resolved? 2023-03-01 11:13:00 +03:00

Graphene Logo Graphene-Django

A Django integration for Graphene.

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Documentation

Visit the documentation to get started!

Quickstart

For installing graphene, just run this command in your shell

pip install "graphene-django>=3"

Settings

INSTALLED_APPS = (
    # ...
    'django.contrib.staticfiles', # Required for GraphiQL
    'graphene_django',
)

GRAPHENE = {
    'SCHEMA': 'app.schema.schema' # Where your Graphene schema lives
}

Urls

We need to set up a GraphQL endpoint in our Django app, so we can serve the queries.

from django.urls import path
from graphene_django.views import GraphQLView

urlpatterns = [
    # ...
    path('graphql/', GraphQLView.as_view(graphiql=True)),
]

Examples

Here is a simple Django model:

from django.db import models

class UserModel(models.Model):
    name = models.CharField(max_length=100)
    last_name = models.CharField(max_length=100)

To create a GraphQL schema for it you simply have to write the following:

from graphene_django import DjangoObjectType
import graphene

class User(DjangoObjectType):
    class Meta:
        model = UserModel

class Query(graphene.ObjectType):
    users = graphene.List(User)

    def resolve_users(self, info):
        return UserModel.objects.all()

schema = graphene.Schema(query=Query)

Then you can query the schema:

query = '''
    query {
      users {
        name,
        lastName
      }
    }
'''
result = schema.execute(query)

To learn more check out the following examples:

GraphQL testing clients

Contributing

See CONTRIBUTING.md

Release Notes