A Django REST framework API adapter for the json-api spec.
Project description
====================================
JSON API and Django Rest Framework
====================================
.. image:: https://travis-ci.org/django-json-api/rest_framework_ember.svg?branch=develop
:target: https://travis-ci.org/django-json-api/rest_framework_ember
By default, Django REST Framework will produce a response like::
{
"count": 20,
"next": "http://example.com/api/1.0/identities/?page=3",
"previous": "http://example.com/api/1.0/identities/?page=1",
"results": [{
"id": 3,
"username": "john",
"full_name": "John Coltrane"
}]
}
However, for an ``identity`` model in JSON API format the response should look
like the following::
{
"links": {
"prev": "http://example.com/api/1.0/identities",
"self": "http://example.com/api/1.0/identities?page=2",
"next": "http://example.com/api/1.0/identities?page=3",
},
"data": [{
"type": "identities",
"id": 3,
"attributes": {
"username": "john",
"full-name": "John Coltrane"
}
}],
"meta": {
"pagination": {
"count": 20
}
}
}
------------
Requirements
------------
1. Django
2. Django REST Framework
------------
Installation
------------
From PyPI
^^^^^^^^^
::
pip install rest_framework_json_api
From Source
^^^^^^^^^^^
::
$ git clone https://github.com/django-json-api/rest_framework_json_api.git
$ cd rest_framework_json_api && pip install -e .
Running Tests
^^^^^^^^^^^^^
::
$ python runtests.py
-----
Usage
-----
``rest_framework_json_api`` assumes you are using class-based views in Django
Rest Framework.
Settings
^^^^^^^^
One can either add ``rest_framework_json_api.parsers.JSONParser`` and
``rest_framework_json_api.renderers.JSONRenderer`` to each ``ViewSet`` class, or
override ``settings.REST_FRAMEWORK``::
REST_FRAMEWORK = {
'PAGINATE_BY': 10,
'PAGINATE_BY_PARAM': 'page_size',
'MAX_PAGINATE_BY': 100,
# DRF v3.1+
'DEFAULT_PAGINATION_CLASS':
'rest_framework_json_api.pagination.PageNumberPagination',
# older than DRF v3.1
'DEFAULT_PAGINATION_SERIALIZER_CLASS':
'rest_framework_json_api.pagination.PaginationSerializer',
'DEFAULT_PARSER_CLASSES': (
'rest_framework_json_api.parsers.JSONParser',
'rest_framework.parsers.FormParser',
'rest_framework.parsers.MultiPartParser'
),
'DEFAULT_RENDERER_CLASSES': (
'rest_framework_json_api.renderers.JSONRenderer',
'rest_framework.renderers.BrowsableAPIRenderer',
),
}
If ``PAGINATE_BY`` is set the renderer will return a ``meta`` object with
record count and a ``links`` object with the next and previous links. Pages
can be specified with the ``page`` GET parameter.
resource_name property
^^^^^^^^^^^^^^^^^^^^^^
You may manually set the ``resource_name`` property on views or serializers to
specify the ``type`` key in the json output. It is automatically set for you as the
plural of the view or model name except on resources that do not subclass
``rest_framework.viewsets.ModelViewSet``::
class Me(generics.GenericAPIView):
"""
Current user's identity endpoint.
GET /me
"""
resource_name = 'users'
serializer_class = identity_serializers.IdentitySerializer
allowed_methods = ['GET']
permission_classes = (permissions.IsAuthenticated, )
Object Key Formats
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*(dasherize/camelize/underscore/pluralize)*
This package includes the ability (off by default) to automatically convert json
requests and responses from the python/rest_framework's preferred underscore to
a format of your choice. To hook this up include the following in your project
settings::
JSON_API_FORMAT_KEYS = True
Note: due to the way the inflector works address_1 can camelize to address1
on output but it cannot convert address1 back to address_1 on POST or PUT. Keep
this in mind when naming fields with numbers in them.
Example - Without format conversion::
{
"data": [{
"type": "identities",
"id": 3,
"attributes": {
"username": "john",
"first_name": "John",
"last_name": "Coltrane",
"full_name": "John Coltrane"
},
}],
"meta": {
"pagination": {
"count": 20
}
}
}
Example - With format conversion set to ``dasherize``::
{
"data": [{
"type": "identities",
"id": 3,
"attributes": {
"username": "john",
"first-name": "John",
"last-name": "Coltrane",
"full-name": "John Coltrane"
},
}],
"meta": {
"pagination": {
"count": 20
}
}
}
Managing the trailing slash
^^^^^^^^^^^^^^^^^^^^^^^^^^^
By default Django expects a trailing slash on urls and will 301 redirect any
requests lacking a trailing slash. You can change the server side by
instantiating the Django REST Framework's router like so::
router = routers.SimpleRouter(trailing_slash=False)
If you aren't using SimpleRouter you can instead set APPEND_SLASH = False
in Django's settings.py file and modify url pattern regex to match routes
without a trailing slash.
If you prefer to make the change on the client side then add an
application adapter to your Ember app and override the buildURL method::
App.ApplicationAdapter = DS.RESTAdapter.extend({
buildURL: function() {
var url = this._super.apply(this, arguments);
if (url.charAt(url.length -1) !== '/') {
url += '/';
}
return url;
}
});
Displaying Server Side Validation Messages
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Ember Data does not ship with a default implementation of a validation error
handler except in the Rails ActiveModelAdapter so to display validation errors
you will need to add a small client adapter::
App.ApplicationAdapter = DS.RESTAdapter.extend({
ajaxError: function(jqXHR) {
var error = this._super(jqXHR);
if (jqXHR && jqXHR.status === 400) {
var response = Ember.$.parseJSON(jqXHR.responseText),
errors = {},
keys = Ember.keys(response);
if (keys.length === 1) {
var jsonErrors = response[keys[0]];
Ember.EnumerableUtils.forEach(Ember.keys(jsonErrors), function(key) {
errors[key] = jsonErrors[key];
});
}
return new DS.InvalidError(errors);
} else {
return error;
}
}
});
The adapter above will handle the following response format when the response has
a 400 status code. The root key ("post" in this example) is discarded::
{
"post": {
"slug": ["Post with this Slug already exists."]
}
}
To display all errors add the following to the template::
{{#each message in errors.messages}}
{{message}}
{{/each}}
To display a specific error inline use the following::
{{#each errors.title}}
<div class="error">{{message}}</div>
{{/each}}
{{input name="title" value=title}}
---------------------
Sideloading Resources
---------------------
If you are using the JSON Renderer globally, this can lead to issues
when hitting endpoints that are intended to sideload other objects.
For example::
{
"users": [],
"cars": []
}
Set the ``resource_name`` property on the object to ``False``, and the data
will be returned without modification.
------
Mixins
------
The following mixin classes are available to use with Rest Framework
resources.
rest_framework_json_api.mixins.MultipleIDMixin
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Overrides ``get_queryset`` to filter by ``ids[]`` in URL query params.
JSON API and Django Rest Framework
====================================
.. image:: https://travis-ci.org/django-json-api/rest_framework_ember.svg?branch=develop
:target: https://travis-ci.org/django-json-api/rest_framework_ember
By default, Django REST Framework will produce a response like::
{
"count": 20,
"next": "http://example.com/api/1.0/identities/?page=3",
"previous": "http://example.com/api/1.0/identities/?page=1",
"results": [{
"id": 3,
"username": "john",
"full_name": "John Coltrane"
}]
}
However, for an ``identity`` model in JSON API format the response should look
like the following::
{
"links": {
"prev": "http://example.com/api/1.0/identities",
"self": "http://example.com/api/1.0/identities?page=2",
"next": "http://example.com/api/1.0/identities?page=3",
},
"data": [{
"type": "identities",
"id": 3,
"attributes": {
"username": "john",
"full-name": "John Coltrane"
}
}],
"meta": {
"pagination": {
"count": 20
}
}
}
------------
Requirements
------------
1. Django
2. Django REST Framework
------------
Installation
------------
From PyPI
^^^^^^^^^
::
pip install rest_framework_json_api
From Source
^^^^^^^^^^^
::
$ git clone https://github.com/django-json-api/rest_framework_json_api.git
$ cd rest_framework_json_api && pip install -e .
Running Tests
^^^^^^^^^^^^^
::
$ python runtests.py
-----
Usage
-----
``rest_framework_json_api`` assumes you are using class-based views in Django
Rest Framework.
Settings
^^^^^^^^
One can either add ``rest_framework_json_api.parsers.JSONParser`` and
``rest_framework_json_api.renderers.JSONRenderer`` to each ``ViewSet`` class, or
override ``settings.REST_FRAMEWORK``::
REST_FRAMEWORK = {
'PAGINATE_BY': 10,
'PAGINATE_BY_PARAM': 'page_size',
'MAX_PAGINATE_BY': 100,
# DRF v3.1+
'DEFAULT_PAGINATION_CLASS':
'rest_framework_json_api.pagination.PageNumberPagination',
# older than DRF v3.1
'DEFAULT_PAGINATION_SERIALIZER_CLASS':
'rest_framework_json_api.pagination.PaginationSerializer',
'DEFAULT_PARSER_CLASSES': (
'rest_framework_json_api.parsers.JSONParser',
'rest_framework.parsers.FormParser',
'rest_framework.parsers.MultiPartParser'
),
'DEFAULT_RENDERER_CLASSES': (
'rest_framework_json_api.renderers.JSONRenderer',
'rest_framework.renderers.BrowsableAPIRenderer',
),
}
If ``PAGINATE_BY`` is set the renderer will return a ``meta`` object with
record count and a ``links`` object with the next and previous links. Pages
can be specified with the ``page`` GET parameter.
resource_name property
^^^^^^^^^^^^^^^^^^^^^^
You may manually set the ``resource_name`` property on views or serializers to
specify the ``type`` key in the json output. It is automatically set for you as the
plural of the view or model name except on resources that do not subclass
``rest_framework.viewsets.ModelViewSet``::
class Me(generics.GenericAPIView):
"""
Current user's identity endpoint.
GET /me
"""
resource_name = 'users'
serializer_class = identity_serializers.IdentitySerializer
allowed_methods = ['GET']
permission_classes = (permissions.IsAuthenticated, )
Object Key Formats
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*(dasherize/camelize/underscore/pluralize)*
This package includes the ability (off by default) to automatically convert json
requests and responses from the python/rest_framework's preferred underscore to
a format of your choice. To hook this up include the following in your project
settings::
JSON_API_FORMAT_KEYS = True
Note: due to the way the inflector works address_1 can camelize to address1
on output but it cannot convert address1 back to address_1 on POST or PUT. Keep
this in mind when naming fields with numbers in them.
Example - Without format conversion::
{
"data": [{
"type": "identities",
"id": 3,
"attributes": {
"username": "john",
"first_name": "John",
"last_name": "Coltrane",
"full_name": "John Coltrane"
},
}],
"meta": {
"pagination": {
"count": 20
}
}
}
Example - With format conversion set to ``dasherize``::
{
"data": [{
"type": "identities",
"id": 3,
"attributes": {
"username": "john",
"first-name": "John",
"last-name": "Coltrane",
"full-name": "John Coltrane"
},
}],
"meta": {
"pagination": {
"count": 20
}
}
}
Managing the trailing slash
^^^^^^^^^^^^^^^^^^^^^^^^^^^
By default Django expects a trailing slash on urls and will 301 redirect any
requests lacking a trailing slash. You can change the server side by
instantiating the Django REST Framework's router like so::
router = routers.SimpleRouter(trailing_slash=False)
If you aren't using SimpleRouter you can instead set APPEND_SLASH = False
in Django's settings.py file and modify url pattern regex to match routes
without a trailing slash.
If you prefer to make the change on the client side then add an
application adapter to your Ember app and override the buildURL method::
App.ApplicationAdapter = DS.RESTAdapter.extend({
buildURL: function() {
var url = this._super.apply(this, arguments);
if (url.charAt(url.length -1) !== '/') {
url += '/';
}
return url;
}
});
Displaying Server Side Validation Messages
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Ember Data does not ship with a default implementation of a validation error
handler except in the Rails ActiveModelAdapter so to display validation errors
you will need to add a small client adapter::
App.ApplicationAdapter = DS.RESTAdapter.extend({
ajaxError: function(jqXHR) {
var error = this._super(jqXHR);
if (jqXHR && jqXHR.status === 400) {
var response = Ember.$.parseJSON(jqXHR.responseText),
errors = {},
keys = Ember.keys(response);
if (keys.length === 1) {
var jsonErrors = response[keys[0]];
Ember.EnumerableUtils.forEach(Ember.keys(jsonErrors), function(key) {
errors[key] = jsonErrors[key];
});
}
return new DS.InvalidError(errors);
} else {
return error;
}
}
});
The adapter above will handle the following response format when the response has
a 400 status code. The root key ("post" in this example) is discarded::
{
"post": {
"slug": ["Post with this Slug already exists."]
}
}
To display all errors add the following to the template::
{{#each message in errors.messages}}
{{message}}
{{/each}}
To display a specific error inline use the following::
{{#each errors.title}}
<div class="error">{{message}}</div>
{{/each}}
{{input name="title" value=title}}
---------------------
Sideloading Resources
---------------------
If you are using the JSON Renderer globally, this can lead to issues
when hitting endpoints that are intended to sideload other objects.
For example::
{
"users": [],
"cars": []
}
Set the ``resource_name`` property on the object to ``False``, and the data
will be returned without modification.
------
Mixins
------
The following mixin classes are available to use with Rest Framework
resources.
rest_framework_json_api.mixins.MultipleIDMixin
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Overrides ``get_queryset`` to filter by ``ids[]`` in URL query params.
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