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revert JSONAPI prefix to JsonApi for paginators. #469

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Sep 13, 2018
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7b29f36
initial integration of JSONAPIDjangoFilter
n2ygk Aug 23, 2018
dc5ca38
documentation, isort, flake8
n2ygk Aug 24, 2018
6b0dc8c
Forgot to add django_filters to installed_apps
n2ygk Aug 24, 2018
d4fbf24
backwards compatibility for py27 + django-filter
n2ygk Aug 24, 2018
d86d217
handle optional django-filter package
n2ygk Aug 24, 2018
83c4cc0
fix travis to match new TOXENVs due to django-filter
n2ygk Aug 24, 2018
f5792c1
fixed a typo
n2ygk Aug 24, 2018
cbc9d55
add a warning if django-filter is missing and JSONAPIDjangoFilter is …
n2ygk Aug 25, 2018
4f2b75b
improve filter_regex
n2ygk Aug 28, 2018
6a8d7ae
easy changes recommended by @sliverc review
n2ygk Aug 29, 2018
db9e1f9
resolve @sliverc review method of using optional django-filter.
n2ygk Aug 29, 2018
51b9946
rename JSONAPIDjangoFilter to DjangoFilterBackend.
n2ygk Aug 30, 2018
cfe89ea
Revert "deprecated JsonApi paginators class prefix to JSONAPI prefix …
n2ygk Aug 30, 2018
00dcf52
revert JSONAPI prefix from paginators
n2ygk Aug 30, 2018
fb17d78
override JSON_API_STANDARD_PAGINATION=False for test suite for now
n2ygk Aug 30, 2018
ee236ea
Merge branch 'master' into remove-JSONAPI-paginators
n2ygk Sep 6, 2018
6145d33
Revert "revert JSONAPI prefix from paginators"
n2ygk Sep 6, 2018
b90d983
Reverts JSONAPI prefix to JsonApi prefix on paginators
n2ygk Sep 7, 2018
5a8d67e
inadvertenly added a junked file
n2ygk Sep 7, 2018
7c8b044
PendingDeprecationWarnings
n2ygk Sep 8, 2018
929251f
Merge remote-tracking branch 'upstream/master' into remove-JSONAPI-pa…
Sep 12, 2018
1c810c0
Clarify deprecation warning of pagination classes
Sep 12, 2018
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6 changes: 2 additions & 4 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -3,11 +3,9 @@
* Add testing configuration to `REST_FRAMEWORK` configuration as described in [DRF](https://www.django-rest-framework.org/api-guide/testing/#configuration)
* Add `HyperlinkedRelatedField` and `SerializerMethodHyperlinkedRelatedField`. See [usage docs](docs/usage.md#related-fields)
* Add related urls support. See [usage docs](docs/usage.md#related-urls)
* Replaced binary `drf_example` sqlite3 db with a [fixture](example/fixtures/drf_example.yaml). See [getting started](docs/getting-started.md#running-the-example-app).
* For naming consistency, renamed new `JsonApi`-prefix pagination classes to `JSONAPI`-prefix.
* Deprecates `JsonApiPageNumberPagination` and `JsonApiLimitOffsetPagination`
* Performance improvement when rendering relationships with `ModelSerializer`
* Replaced binary `drf_example` sqlite3 db with a [fixture](example/fixtures/drf_example.yaml). See [usage docs](docs/usage.md#running-the-example-app).
* Add optional [jsonapi-style](http://jsonapi.org/format/) filter backends. See [usage docs](docs/usage.md#filter-backends)
* Performance improvement when rendering relationships with `ModelSerializer`

v2.5.0 - Released July 11, 2018

Expand Down
2 changes: 1 addition & 1 deletion README.rst
Original file line number Diff line number Diff line change
Expand Up @@ -161,7 +161,7 @@ override ``settings.REST_FRAMEWORK``
'PAGE_SIZE': 10,
'EXCEPTION_HANDLER': 'rest_framework_json_api.exceptions.exception_handler',
'DEFAULT_PAGINATION_CLASS':
'rest_framework_json_api.pagination.JSONAPIPageNumberPagination',
'rest_framework_json_api.pagination.JsonApiPageNumberPagination',
'DEFAULT_PARSER_CLASSES': (
'rest_framework_json_api.parsers.JSONParser',
'rest_framework.parsers.FormParser',
Expand Down
37 changes: 24 additions & 13 deletions docs/usage.md
Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ REST_FRAMEWORK = {
'PAGE_SIZE': 10,
'EXCEPTION_HANDLER': 'rest_framework_json_api.exceptions.exception_handler',
'DEFAULT_PAGINATION_CLASS':
'rest_framework_json_api.pagination.JSONAPIPageNumberPagination',
'rest_framework_json_api.pagination.JsonApiPageNumberPagination',
'DEFAULT_PARSER_CLASSES': (
'rest_framework_json_api.parsers.JSONParser',
'rest_framework.parsers.FormParser',
Expand Down Expand Up @@ -50,6 +50,8 @@ DJA pagination is based on [DRF pagination](https://www.django-rest-framework.or
When pagination is enabled, the renderer will return a `meta` object with
record count and a `links` object with the next, previous, first, and last links.

Optional query parameters can also be provided to customize the page size or offset limit.

#### Configuring the Pagination Style

Pagination style can be set on a particular viewset with the `pagination_class` attribute or by default for all viewsets
Expand All @@ -58,36 +60,45 @@ by setting `REST_FRAMEWORK['DEFAULT_PAGINATION_CLASS']` and by setting `REST_FRA
You can configure fixed values for the page size or limit -- or allow the client to choose the size or limit
via query parameters.

Two pagination classes are available:
- `JSONAPIPageNumberPagination` breaks a response up into pages that start at a given page number
with a given size (number of items per page). It can be configured with the following attributes:
Two pagination classes are available **but their names will change in release 3.0**:
- `JsonApiPageNumberPagination` breaks a response up into pages that start at a given page number with a given size
(number of items per page). It can be configured with the following attributes:
- `page_query_param` (default `page[number]`)
- `page_size_query_param` (default `page[size]`) Set this to `None` if you don't want to allow the client
to specify the size.
- `page_size` (default `REST_FRAMEWORK['PAGE_SIZE']`) default number of items per page unless overridden by
`page_size_query_param`.
- `max_page_size` (default `100`) enforces an upper bound on the `page_size_query_param`.
Set it to `None` if you don't want to enforce an upper bound.
- `JSONAPILimitOffsetPagination` breaks a response up into pages that start from an item's offset
in the viewset for a given number of items (the limit).

In release 3.0, `JsonApiPageNumberPagination` will be renamed `PageNumberPagination`.
- `JsonApiLimitOffsetPagination` breaks a response up into pages that start from an item's offset in the viewset for
a given number of items (the limit).
It can be configured with the following attributes:
- `offset_query_param` (default `page[offset]`).
- `limit_query_param` (default `page[limit]`).
- `default_limit` (default `REST_FRAMEWORK['PAGE_SIZE']`) is the default number of items per page unless
overridden by `limit_query_param`.
- `max_limit` (default `100`) enforces an upper bound on the limit.
Set it to `None` if you don't want to enforce an upper bound.

In release 3.0, `JsonApiLimitOffsetPagination` will be renamed `LimitOffsetPagination`.

These examples show how to configure the parameters to use non-standard names and different limits:

```python
from rest_framework_json_api.pagination import JSONAPIPageNumberPagination, JSONAPILimitOffsetPagination
from rest_framework_json_api.pagination import JsonApiPageNumberPagination, JsonApiLimitOffsetPagination

class MyPagePagination(JSONAPIPageNumberPagination):
class MyPagePagination(JsonApiPageNumberPagination):
page_query_param = 'page_number'
page_size_query_param = 'page_size'
page_size_query_param = 'page_length'
page_size = 3
max_page_size = 1000

class MyLimitPagination(JSONAPILimitOffsetPagination):
class MyLimitPagination(JsonApiLimitOffsetPagination):
offset_query_param = 'offset'
limit_query_param = 'limit'
default_limit = 3
max_limit = None
```

Expand Down Expand Up @@ -146,7 +157,7 @@ If you are also using [`rest_framework.filters.SearchFilter`](https://django-res
(which performs single parameter searchs across multiple fields) you'll want to customize the name of the query
parameter for searching to make sure it doesn't conflict with a field name defined in the filterset.
The recommended value is: `search_param="filter[search]"` but just make sure it's
`filter[_something_]` to comply with the jsonapi spec requirement to use the filter
`filter[_something_]` to comply with the JSON:API spec requirement to use the filter
keyword. The default is "search" unless overriden.

The filter returns a `400 Bad Request` error for invalid filter query parameters as in this example
Expand Down Expand Up @@ -446,7 +457,7 @@ class OrderSerializer(serializers.ModelSerializer):

```

In the [JSON API spec](http://jsonapi.org/format/#document-resource-objects),
In the [JSON:API spec](http://jsonapi.org/format/#document-resource-objects),
relationship objects contain links to related objects. To make this work
on a serializer we need to tell the `ResourceRelatedField` about the
corresponding view. Use the `HyperlinkedModelSerializer` and instantiate
Expand Down Expand Up @@ -584,7 +595,7 @@ class OrderSerializer(serializers.HyperlinkedModelSerializer):
### RelationshipView
`rest_framework_json_api.views.RelationshipView` is used to build
relationship views (see the
[JSON API spec](http://jsonapi.org/format/#fetching-relationships)).
[JSON:API spec](http://jsonapi.org/format/#fetching-relationships)).
The `self` link on a relationship object should point to the corresponding
relationship view.

Expand Down
1 change: 1 addition & 0 deletions example/settings/dev.py
Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,7 @@

JSON_API_FORMAT_FIELD_NAMES = 'camelize'
JSON_API_FORMAT_TYPES = 'camelize'
JSON_API_STANDARD_PAGINATION = True
REST_FRAMEWORK = {
'PAGE_SIZE': 5,
'EXCEPTION_HANDLER': 'rest_framework_json_api.exceptions.exception_handler',
Expand Down
3 changes: 3 additions & 0 deletions example/settings/test.py
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,9 @@
JSON_API_FIELD_NAMES = 'camelize'
JSON_API_FORMAT_TYPES = 'camelize'
JSON_API_PLURALIZE_TYPES = True
# TODO: 13 tests fail when this is True because they use `page` and `page_size`. Fix them.
JSON_API_STANDARD_PAGINATION = False

REST_FRAMEWORK.update({
'PAGE_SIZE': 1,
})
35 changes: 16 additions & 19 deletions example/tests/unit/test_pagination.py
Original file line number Diff line number Diff line change
Expand Up @@ -13,11 +13,11 @@

class TestLimitOffset:
"""
Unit tests for `pagination.JSONAPILimitOffsetPagination`.
Unit tests for `pagination.JsonApiLimitOffsetPagination`.
"""

def setup(self):
class ExamplePagination(pagination.JSONAPILimitOffsetPagination):
class ExamplePagination(pagination.JsonApiLimitOffsetPagination):
default_limit = 10
max_limit = 15

Expand Down Expand Up @@ -79,33 +79,30 @@ def test_valid_offset_limit(self):
assert queryset == list(range(offset + 1, next_offset + 1))
assert content == expected_content

@pytest.mark.xfail((sys.version_info.major, sys.version_info.minor) == (2, 7),
reason="python2.7 fails to generate DeprecationWarrning for unknown reason")
def test_limit_offset_deprecation(self):
with pytest.warns(DeprecationWarning) as record:
pagination.LimitOffsetPagination()
assert len(record) == 1
assert 'LimitOffsetPagination' in str(record[0].message)

with pytest.warns(DeprecationWarning) as record:
pagination.JsonApiLimitOffsetPagination()
assert len(record) == 1
assert 'JsonApiLimitOffsetPagination' in str(record[0].message)
assert len(record) == 2
assert 'LimitOffsetPagination will change in release 3.0' in str(record[0].message)
assert 'JsonApiLimitOffsetPagination will be replaced by LimitOffsetPagination' \
in str(record[1].message)


# TODO: This test fails under py27 but it's not clear why so just leave it out for now.
@pytest.mark.xfail((sys.version_info.major, sys.version_info.minor) == (2, 7),
reason="python2.7 fails for unknown reason")
class TestPageNumber:
"""
Unit tests for `pagination.JSONAPIPageNumberPagination`.
Unit tests for `pagination.JsonApiPageNumberPagination`.
TODO: add unit tests for changing query parameter names, limits, etc.
"""

@pytest.mark.xfail((sys.version_info.major, sys.version_info.minor) == (2, 7),
reason="python2.7 fails to generate DeprecationWarrning for unknown reason")
def test_page_number_deprecation(self):
with pytest.warns(DeprecationWarning) as record:
pagination.PageNumberPagination()
assert len(record) == 1
assert 'PageNumberPagination' in str(record[0].message)

with pytest.warns(DeprecationWarning) as record:
pagination.JsonApiPageNumberPagination()
assert len(record) == 1
assert 'JsonApiPageNumberPagination' in str(record[0].message)
assert len(record) == 2
assert 'PageNumberPagination will change in release 3.0' in str(record[0].message)
assert 'JsonApiPageNumberPagination will be replaced by PageNumberPagination' \
in str(record[1].message)
6 changes: 3 additions & 3 deletions example/views.py
Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ def get_object(self):
return super(BlogViewSet, self).get_object()


class JSONAPIViewSet(ModelViewSet):
class JsonApiViewSet(ModelViewSet):
"""
This is an example on how to configure DRF-jsonapi from
within a class. It allows using DRF-jsonapi alongside
Expand All @@ -59,12 +59,12 @@ def handle_exception(self, exc):
exc.status_code = HTTP_422_UNPROCESSABLE_ENTITY
# exception handler can't be set on class so you have to
# override the error response in this method
response = super(JSONAPIViewSet, self).handle_exception(exc)
response = super(JsonApiViewSet, self).handle_exception(exc)
context = self.get_exception_handler_context()
return format_drf_errors(response, context, exc)


class BlogCustomViewSet(JSONAPIViewSet):
class BlogCustomViewSet(JsonApiViewSet):
queryset = Blog.objects.all()
serializer_class = BlogSerializer

Expand Down
123 changes: 123 additions & 0 deletions rest_framework_json_api/filters/django_filter.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,123 @@
import re
Copy link
Contributor Author

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this was added here by mistake. removing in next commit.


from rest_framework.exceptions import ValidationError
from rest_framework.settings import api_settings

from django_filters import VERSION
from django_filters.rest_framework import DjangoFilterBackend
from rest_framework_json_api.utils import format_value


class DjangoFilterBackend(DjangoFilterBackend):
"""
A Django-style ORM filter implementation, using `django-filter`.

This is not part of the jsonapi standard per-se, other than the requirement
to use the `filter` keyword: This is an optional implementation of style of
filtering in which each filter is an ORM expression as implemented by
DjangoFilterBackend and seems to be in alignment with an interpretation of
http://jsonapi.org/recommendations/#filtering, including relationship
chaining. It also returns a 400 error for invalid filters.

Filters can be:
- A resource field equality test:
`?filter[qty]=123`
- Apply other [field lookup](https://docs.djangoproject.com/en/stable/ref/models/querysets/#field-lookups) # noqa: E501
operators:
`?filter[name.icontains]=bar` or `?filter[name.isnull]=true...`
- Membership in a list of values:
`?filter[name.in]=abc,123,zzz (name in ['abc','123','zzz'])`
- Filters can be combined for intersection (AND):
`?filter[qty]=123&filter[name.in]=abc,123,zzz&filter[...]`
- A related resource path can be used:
`?filter[inventory.item.partNum]=123456 (where `inventory.item` is the relationship path)`

If you are also using rest_framework.filters.SearchFilter you'll want to customize
the name of the query parameter for searching to make sure it doesn't conflict
with a field name defined in the filterset.
The recommended value is: `search_param="filter[search]"` but just make sure it's
`filter[<something>]` to comply with the jsonapi spec requirement to use the filter
keyword. The default is "search" unless overriden but it's used here just to make sure
we don't complain about it being an invalid filter.
"""
# TODO: find a better way to deal with search_param.
search_param = api_settings.SEARCH_PARAM

# Make this regex check for 'filter' as well as 'filter[...]'
# Leave other incorrect usages of 'filter' to JSONAPIQueryValidationFilter.
# See http://jsonapi.org/format/#document-member-names for allowed characters
# and http://jsonapi.org/format/#document-member-names-reserved-characters for reserved
# characters (for use in paths, lists or as delimiters).
# regex `\w` matches [a-zA-Z0-9_].
# TODO: U+0080 and above allowed but not recommended. Leave them out for now.e
# Also, ' ' (space) is allowed within a member name but not recommended.
filter_regex = re.compile(r'^filter(?P<ldelim>\[?)(?P<assoc>[\w\.\-]*)(?P<rdelim>\]?$)')

def _validate_filter(self, keys, filterset_class):
for k in keys:
if ((not filterset_class) or (k not in filterset_class.base_filters)):
raise ValidationError("invalid filter[{}]".format(k))

def get_filterset(self, request, queryset, view):
"""
Sometimes there's no filterset_class defined yet the client still
requests a filter. Make sure they see an error too. This means
we have to get_filterset_kwargs() even if there's no filterset_class.

TODO: .base_filters vs. .filters attr (not always present)
"""
filterset_class = self.get_filterset_class(view, queryset)
kwargs = self.get_filterset_kwargs(request, queryset, view)
self._validate_filter(kwargs.pop('filter_keys'), filterset_class)
if filterset_class is None:
return None
return filterset_class(**kwargs)

def get_filterset_kwargs(self, request, queryset, view):
"""
Turns filter[<field>]=<value> into <field>=<value> which is what
DjangoFilterBackend expects
"""
filter_keys = []
# rewrite filter[field] query params to make DjangoFilterBackend work.
data = request.query_params.copy()
for qp, val in data.items():
m = self.filter_regex.match(qp)
if m and (not m.groupdict()['assoc'] or
m.groupdict()['ldelim'] != '[' or m.groupdict()['rdelim'] != ']'):
raise ValidationError("invalid filter: {}".format(qp))
if m and qp != self.search_param:
if not val:
raise ValidationError("missing {} test value".format(qp))
# convert jsonapi relationship path to Django ORM's __ notation
key = m.groupdict()['assoc'].replace('.', '__')
# undo JSON_API_FORMAT_FIELD_NAMES conversion:
key = format_value(key, 'underscore')
data[key] = val
filter_keys.append(key)
del data[qp]
return {
'data': data,
'queryset': queryset,
'request': request,
'filter_keys': filter_keys,
}

def filter_queryset(self, request, queryset, view):
"""
Backwards compatibility to 1.1 (required for Python 2.7)
In 1.1 filter_queryset does not call get_filterset or get_filterset_kwargs.
"""
# TODO: remove when Python 2.7 support is deprecated
if VERSION >= (2, 0, 0):
return super(DjangoFilterBackend, self).filter_queryset(request, queryset, view)

filter_class = self.get_filter_class(view, queryset)

kwargs = self.get_filterset_kwargs(request, queryset, view)
self._validate_filter(kwargs.pop('filter_keys'), filter_class)

if filter_class:
return filter_class(kwargs['data'], queryset=queryset, request=request).qs

return queryset
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