graphene-django/docs/introspection.rst
Emil Goldsmith Olesen fcc491fffb Add watch option to graphql_schema (#656)
* Add watch option to graphql_schema

* add documentation for grapql_schema --watch
2019-06-09 17:06:50 -07:00

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Introspection Schema
====================
Relay Modern uses `Babel Relay Plugin <https://facebook.github.io/relay/docs/en/installation-and-setup>`__ which requires you to provide your GraphQL schema data.
Graphene comes with a Django management command to dump your schema
data to ``schema.json`` which is compatible with babel-relay-plugin.
Usage
-----
Include ``graphene_django`` to ``INSTALLED_APPS`` in your project
settings:
.. code:: python
INSTALLED_APPS += ('graphene_django')
Assuming your Graphene schema is at ``tutorial.quickstart.schema``, run
the command:
.. code:: bash
./manage.py graphql_schema --schema tutorial.quickstart.schema --out schema.json
It dumps your full introspection schema to ``schema.json`` inside your
project root directory. Point ``babel-relay-plugin`` to this file and
you're ready to use Relay with Graphene GraphQL implementation.
The schema file is sorted to create a reproducible canonical representation.
Advanced Usage
--------------
The ``--indent`` option can be used to specify the number of indentation spaces to
be used in the output. Defaults to `None` which displays all data on a single line.
The ``--watch`` option can be used to run ``./manage.py graphql_schema`` in watch mode, where it will automatically output a new schema every time there are file changes in your project
To simplify the command to ``./manage.py graphql_schema``, you can
specify the parameters in your settings.py:
.. code:: python
GRAPHENE = {
'SCHEMA': 'tutorial.quickstart.schema',
'SCHEMA_OUTPUT': 'data/schema.json' # defaults to schema.json
}
Running ``./manage.py graphql_schema`` dumps your schema to
``<project root>/data/schema.json``.
Help
----
Run ``./manage.py graphql_schema -h`` for command usage.