django-rest-framework-tricks 0.2.14

必需导入

from django.db import models

from rest_framework_tricks.models.fields import NestedProxyField

模型定义

BOOK_PUBLISHING_STATUS_PUBLISHED = 'published'
BOOK_PUBLISHING_STATUS_NOT_PUBLISHED = 'not_published'
BOOK_PUBLISHING_STATUS_IN_PROGRESS = 'in_progress'
BOOK_PUBLISHING_STATUS_CHOICES = (
    (BOOK_PUBLISHING_STATUS_PUBLISHED, "Published"),
    (BOOK_PUBLISHING_STATUS_NOT_PUBLISHED, "Not published"),
    (BOOK_PUBLISHING_STATUS_IN_PROGRESS, "In progress"),
)
BOOK_PUBLISHING_STATUS_DEFAULT = BOOK_PUBLISHING_STATUS_PUBLISHED


class Book(models.Model):
    """Book."""

    title = models.CharField(max_length=100)
    description = models.TextField(null=True, blank=True)
    summary = models.TextField(null=True, blank=True)
    publication_date = models.DateField()
    state = models.CharField(max_length=100,
                             choices=BOOK_PUBLISHING_STATUS_CHOICES,
                             default=BOOK_PUBLISHING_STATUS_DEFAULT)
    isbn = models.CharField(max_length=100, unique=True)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    pages = models.PositiveIntegerField(default=200)
    stock_count = models.PositiveIntegerField(default=30)

    # List the fields for `PublishingInformationSerializer` nested
    # serializer. This does not cause a model change.
    publishing_information = NestedProxyField(
        'publication_date',
        'isbn',
        'pages',
    )

    # List the fields for `StockInformationSerializer` nested serializer.
    # This does not cause a model change.
    stock_information = NestedProxyField(
        'stock_count',
        'price',
        'state',
    )

    class Meta:
        """Meta options."""

        ordering = ["isbn"]

    def __str__(self):
        return self.title

必需导入

from rest_framework import serializers
from rest_framework_tricks.serializers import (
    HyperlinkedModelSerializer,
)

from .models import Book

定义序列化器

嵌套序列化器

class PublishingInformationSerializer(serializers.ModelSerializer):
    """Publishing information serializer."""

    publication_date = serializers.DateField(required=False)
    isbn = serializers.CharField(required=False)
    pages = serializers.IntegerField(required=False)

    class Meta:
        """Meta options."""

        model = Book
        fields = (
            'publication_date',
            'isbn',
            'pages',
        )
        # Note, that this should be set to True to identify that
        # this serializer is going to be used as `NestedProxyField`.
        nested_proxy_field = True

嵌套序列化器

class StockInformationSerializer(serializers.ModelSerializer):
    """Stock information serializer."""

    class Meta:
        """Meta options."""

        model = Book
        fields = (
            'stock_count',
            'price',
            'state',
        )
        # Note, that this should be set to True to identify that
        # this serializer is going to be used as `NestedProxyField`.
        nested_proxy_field = True

用于 ViewSet 的主要序列化器

# Note, that we are importing the ``HyperlinkedModelSerializer`` from
# the `rest_framework_tricks.serializers`. Names of the serializers
# should match the names of model properties set with ``NestedProxyField``
# fields.
class BookSerializer(HyperlinkedModelSerializer):
    """Book serializer."""

    publishing_information = PublishingInformationSerializer(required=False)
    stock_information = StockInformationSerializer(required=False)

    class Meta:
        """Meta options."""

        model = Book
        fields = (
            'url',
            'id',
            'title',
            'description',
            'summary',
            'publishing_information',
            'stock_information',
        )

必需导入

from rest_framework.viewsets import ModelViewSet
from rest_framework.permissions import AllowAny

from .models import Book
from .serializers import BookSerializer

ViewSet 定义

class BookViewSet(ModelViewSet):
    """Book ViewSet."""

    queryset = Book.objects.all()
    serializer_class = BookSerializer
    permission_classes = [AllowAny]

示例 OPTIONS 调用

OPTIONS /books/api/books/
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "name": "Book List",
    "description": "Book ViewSet.",
    "renders": [
        "application/json",
        "text/html"
    ],
    "parses": [
        "application/json",
        "application/x-www-form-urlencoded",
        "multipart/form-data"
    ],
    "actions": {
        "POST": {
            "id": {
                "type": "integer",
                "required": false,
                "read_only": true,
                "label": "ID"
            },
            "title": {
                "type": "string",
                "required": true,
                "read_only": false,
                "label": "Title",
                "max_length": 100
            },
            "description": {
                "type": "string",
                "required": false,
                "read_only": false,
                "label": "Description"
            },
            "summary": {
                "type": "string",
                "required": false,
                "read_only": false,
                "label": "Summary"
            },
            "publishing_information": {
                "type": "nested object",
                "required": false,
                "read_only": false,
                "label": "Publishing information",
                "children": {
                    "publication_date": {
                        "type": "date",
                        "required": false,
                        "read_only": false,
                        "label": "Publication date"
                    },
                    "isbn": {
                        "type": "string",
                        "required": false,
                        "read_only": false,
                        "label": "Isbn"
                    },
                    "pages": {
                        "type": "integer",
                        "required": false,
                        "read_only": false,
                        "label": "Pages"
                    }
                }
            },
            "stock_information": {
                "type": "nested object",
                "required": false,
                "read_only": false,
                "label": "Stock information",
                "children": {
                    "stock_count": {
                        "type": "integer",
                        "required": false,
                        "read_only": false,
                        "label": "Stock count"
                    },
                    "price": {
                        "type": "decimal",
                        "required": true,
                        "read_only": false,
                        "label": "Price"
                    },
                    "state": {
                        "type": "choice",
                        "required": false,
                        "read_only": false,
                        "label": "State",
                        "choices": [
                            {
                                "value": "published",
                                "display_name": "Published"
                            },
                            {
                                "value": "not_published",
                                "display_name": "Not published"
                            },
                            {
                                "value": "in_progress",
                                "display_name": "In progress"
                            }
                        ]
                    }
                }
            }
        }
    }
}

必需导入

from django.db import models

模型定义

class Profile(models.Model):
    """Profile."""

    user = models.ForeignKey('auth.User')
    biography = models.TextField()
    hobbies = models.TextField()

必需导入

from rest_framework import serializers

from .models import Profile

定义序列化器

class ProfileSerializer(serializers.ModelSerializer):
    """Profile serializer."""

    username = serializers.CharField(source='user.username', read_only=True)
    full_name = serializers.SerializerMethodField()
    email = serializers.CharField(source='user.email', read_only=True)

    class Meta(object):

    model = Profile
    fields = (
        'id',
        'username',
        'full_name',
        'email',
        'biography',
        'hobbies',
    )

    def get_full_name(self, obj):
        return obj.user.get_full_name()

必需导入

from rest_framework.viewsets import ModelViewSet
from rest_framework.permissions import AllowAny
from rest_framework_tricks.filters import OrderingFilter

from .models import Profile
from .serializers import ProfileSerializer

ViewSet 定义

class ProfileViewSet(ModelViewSet):
    """Profile ViewSet."""

    queryset = Profile.objects.all()
    serializer_class = ProfileSerializer
    permission_classes = [AllowAny]
    filter_backends = (OrderingFilter,)
    ordering_fields = {
        'id': 'id',
        'username': 'user__username',
        'email': 'user__email',
        'full_name': ['user__first_name', 'user__last_name']
    }
    ordering = ('id',)

示例 GET 调用

注意，我们的排序选项现在与序列化器（JSON响应）中的字段名称相等。这样，API 就更容易使用和理解。

GET /api/profile/?ordering=email
GET /api/profile/?ordering=-username
GET /api/profile/?ordering=full_name
GET /api/profile/?ordering=-full_name

必需导入

from django.db import models

模型定义

class Profile(models.Model):
    """Upload."""

    username = models.CharField(max_length=255)
    resume = models.FileField()

必需导入

from rest_framework import serializers
from rest_framework_tricks.fields import ConstrainedFileField

from .models import Upload

定义序列化器

class ProfileSerializer(serializers.ModelSerializer):
    """Profile serializer."""

    username = serializers.CharField()
    # Restrict resume to 5Mb
    resume = ConstrainedFileField(max_upload_size=5_242_880)

    class Meta(object):

    model = Profile
    fields = (
        'id',
        'username',
        'resume',
    )