graphene-file-upload-patch 1.3.0.0
Lib for adding file upload functionality to GraphQL mutations in Graphene Django and Flask-Graphql
Keywords: graphql,graphene,apollo,upload

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graphene-file-upload
====================

``graphene-file-upload`` is a drop in replacement for the the GraphQL
view in Graphene for Django, and for Flask-Graphql. 

It supports multi-part file uploads that adhere to the `Multipart Request Spec <https://github.com/jaydenseric/graphql-multipart-request-spec>`_.

It currently supports Python 2.7 and 3.4+.

Installation:
-------------

.. code:: bash

    $ pip install graphene-file-upload

Usage
-----

To add an upload type to your mutation, import and use ``Upload``.
Upload is a scalar type.

.. code:: python

   from graphene_file_upload.scalars import Upload

   class UploadMutation(graphene.Mutation):
       class Arguments:
           file = Upload(required=True)

       success = graphene.Boolean()

       def mutate(self, info, file, **kwargs):
           # do something with your file

           return UploadMutation(success=True)

Django Integration:
~~~~~~~~~~~~~~~~~~~

To use, import the view, then add to your list of urls (replace previous
GraphQL view).

.. code:: python

   from graphene_file_upload.django import FileUploadGraphQLView

   urlpatterns = [
     url(r'^graphql', FileUploadGraphQLView.as_view(graphiql=True)),
   ]

Flask Integration:
~~~~~~~~~~~~~~~~~~

Note that ``flask-graphql`` version ``<2.0`` is not supported. At the
time of writing this README, you must install ``flask-graphql`` with
``pip install --pre flask-graphql``

Simply import the modified view and create a new url rule on your app:

.. code:: python

   from graphene_file_upload.flask import FileUploadGraphQLView

   app.add_url_rule(
       '/graphql',
       view_func=FileUploadGraphQLView.as_view(
         ...
       )
   )

Testing
-------

Flask
~~~~~

`<https://flask.palletsprojects.com/en/1.1.x/testing/#the-testing-skeleton/>`_

.. code:: python

    # Create a fixture using the file_graphql_query helper and `client` fixture.
    import os
    import json
    import tempfile

    from flaskr import flaskr
    import pytest
    from graphene_file_upload.flask.testing import file_graphql_query


    @pytest.fixture
    def client():
        db_fd, flaskr.app.config['DATABASE'] = tempfile.mkstemp()
        flaskr.app.config['TESTING'] = True

        with flaskr.app.test_client() as client:
            with flaskr.app.app_context():
                flaskr.init_db()
            yield client

        os.close(db_fd)
        os.unlink(flaskr.app.config['DATABASE'])

    @pytest.fixture
    def client_query(client):
        def func(*args, **kwargs):
            return file_graphql_query(*args, **kwargs, client=client)

        return func

    # Test your query using the client_query fixture
    def test_some_query(client_query):
        test_file = SimpleUploadedFile(name='test.txt', content=file_text.encode('utf-8'))

        response = client_query(
            '''
            mutation testMutation($file: Upload!) {
                myUpload(fileIn: $file) {
                    ok
                }
            }
            ''',
            op_name='testMutation'
            files={'file': test_file},
        )

        content = json.loads(response.content)
        assert 'errors' not in content


Django
~~~~~~

Writing test using `django's test client <https://docs.djangoproject.com/en/3.1/topics/testing/tools/#default-test-client />`_

Using pytest
############

To use pytest define a simple fixture using the query helper below

.. code:: python

    # Create a fixture using the file_graphql_query helper and ``client` fixture from ``pytest-django``.

    import json
    import pytest
    from graphene_file_upload.django.testing import file_graphql_query

    @pytest.fixture
    def client_query(client):
        def func(*args, **kwargs):
            return file_graphql_query(*args, **kwargs, client=client)

        return func

    # Test your query using the client_query fixture
    def test_some_query(client_query):
        test_file = SimpleUploadedFile(name='test.txt', content=file_text.encode('utf-8'))

        response = client_query(
            '''
            mutation testMutation($file: Upload!) {
                myUpload(fileIn: $file) {
                    ok
                }
            }
            ''',
            op_name='testMutation'
            files={'file': test_file},
        )

        content = json.loads(response.content)
        assert 'errors' not in content


Using unittest
##############

Your endpoint is set through the ``GRAPHQL_URL`` attribute on ``GraphQLFileUploadTestCase``. 

The default endpoint is ``GRAPHQL_URL = “/graphql/”``.

.. code:: python
    
    import json

    from graphene_file_upload.django.testing import GraphQLFileUploadTestCase

    class MutationTestCase(GraphQLFileUploadTestCase):
       def test_some_mutation(self):
            test_file = SimpleUploadedFile(name='test.txt', content=file_text.encode('utf-8'))

            response = self.file_query(
                '''
                mutation testMutation($file: Upload!) {
                    myUpload(fileIn: $file) {
                        ok
                    }
                }
                ''',
                op_name='testMutation',
                files={'file': test_file},
            )

            # This validates the status code and if you get errors
            self.assertResponseNoErrors(response)


Contributing:
-------------

If you'd like to contribute, please run the test suite prior to sending a PR.

In order to run the testing environment, create a virtual environment, install
tox, and run the tox commands:

.. code:: bash

    $ python3 -m venv venv
    $ source venv/bin/activate
    $ make install
    # You may have to deactivate and reactivate to have access to the tox command,
    # depending on your system.

    # Run the test suite with the versions of python you have installed
    $ tox
    # Alternatively, if you're using something like pyenv and can easily install
    # Multiple versions of python, then try running the following command
    $ tox

    # If for some reason you need to recreate the tox environment (e.g. a new
    # dependency has been added since you last ran it, add the -r flag to the
    # tox command)
    $ tox -r {...additional flags...}

Check out `pyenv
<https://github.com/pyenv/pyenv>`_ if you'd like a simple way of
installing multiple python versions to test out.

Packaging for PyPi:
-------------------

Run

.. code:: bash

    $ make deploy