djangorestframework-ext 0.21

Django Rest framework Extensions

Django REST framework Ext

Some extensions of Django REST framework.

Pagination

DynamicSizePageNumberPagination

Support setting PAGE_QUERY_PARAM (default is page) parameter to specify the page size for querying.

Return all data when the PAGE_QUERY_PARAM (default is limit) parameter is not specified.

Usage:

REST_FRAMEWORK = {
    ...
    'DEFAULT_PAGINATION_CLASS': 'djangorestframework_ext.pagination.DynamicSizePageNumberPagination',
    ...
}

REST_FRAMEWORK_EXT = {
    'PAGE_QUERY_PARAM': 'page',  # Default is page (If not set)
    'PAGE_SIZE_QUERY_PARAM': 'limit',
}

Request:

GET https://api.example.org/accounts/?page=4&limit=100

Permissions

IsCurrentUser

Determine whether the object is the current login user.

Usage:

from djangorestframework_ext.permissions import IsCurrentUser

IsSuperuser

Determine whether the request user is superuser.

Usage:

from djangorestframework_ext.permissions import IsSuperuser

Serializers

RecursiveSerializer

Usage:

from rest_framework import serializers
from djangorestframework_ext.serializers import RecursiveSerializer
from django.db import models


class Department(models.Model):
    name = models.CharField('Name', max_length=100)
    parent = models.ForeignKey('self', related_name='children', verbose_name='Parent')


class DepartmentTreeListSerializer(serializers.ModelSerializer):
    children = RecursiveSerializer(many=True)

    class Meta:
        model = Department
        fields = '__all__'

Response:

[{
    "id": 1,
    "children": [{
        "id": 2,
        "children": [{
            "id": 3,
            "children": [{
                "id": 4,
                "children": [],
                "name": "aaa",
                "parent": 3
            }],
            "name": "ddd",
            "parent": 2
        }, {
            "id": 5,
            "children": [{
                "id": 6,
                "children": [],
                "name": "eee",
                "parent": 7
            }],
            "name": "xxx",
            "parent": 2
        }],
        "name": "yyy",
        "parent": 1
    }],
    "name": "zzz",
    "parent": null
}]

ExportModelSerializer

Use verbose name or label replace field name.

Usage:

from djangorestframework_ext.serializers import ExportModelSerializer
from django.db import models


class Department(models.Model):
    name = models.CharField('Name', max_length=100)
    creator = models.ForeignKey(User, null=False, verbose_name='Creator')


class DepartmentExportSerializer(ExportModelSerializer):
    creator = serializers.StringRelatedField(label='Creator', read_only=True)
    
    class Meta:
        model = Department
        fields = ['name', 'creator']

Response:

[{
    "Name": "aaa",
    "Creator": "John"
}]

DynamicFieldsModelSerializer

It's copied from official document.

When using DynamicFieldsModelSerializer, the settings in Meta such as exclude and fields are ignored. Instead, the fields specified in the parameter that is passed in will take precedence.

Mixins

MultiFieldLookupMixin

From Multiple lookup_fields for django rest framework.

Used for multi field lookup.

Usage:

views.py:

class ExampleViewSet(MultipleFieldLookupMixin, viewsets.ModelViewSet):
    lookup_fields = ['pk', 'field_one', 'field_two']

urls.py:

urlpatterns = [
    path(r'examples/<str:field_one>/<str:field_two>/', views.ExampleViewSet.as_view({'get': 'retrieve'}))
]

ViewSets

ExportModelViewSet

Use epxort action and ExportPermission to exporting data.

Utils

get_default_query_params

Get default query params.

Views

exception_handler

Some exception handlers.

Usage:

REST_FRAMEWORK = {
    ...
    'EXCEPTION_HANDLER': 'djangorestframework_ext.views.exception_handler',
    ...
}

Validators

ActiveValidator

Validate whether the corresponding object is active using the specified key (default is is_active) and value (default is True).

Usage:

from rest_framework import serializers

class MySerializer(serializers.ModelSerializer):
    relation = serializers.PrimaryKeyRelatedField(queryset=Relation.objects.all(), validators=[ActiveValidator()])