from django.db import models

from rest_framework_tricks.models.fields import NestedProxyField

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

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

from .models import Book

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

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

# 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',
        )

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

from .models import Book
from .serializers import BookSerializer

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

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

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

    # ...

    # List the fields for `PersonalContactInformationSerializer` nested
    # serializer. This does not cause a model change.
    personal_contact_information = NestedProxyField(
        'email',
        'phone_number',
        'website',
    )

    # List the fields for `BusinessContactInformationSerializer` nested
    # serializer. This does not cause a model change.
    business_contact_information = NestedProxyField(
        'company',
        'company_email',
        'company_phone_number',
        'company_website',
    )

    # List the fields for `ContactInformationSerializer` nested
    # serializer. This does not cause a model change.
    contact_information = NestedProxyField(
        'personal_contact_information',
        'business_contact_information',
    )

    # ...

from django.db import models

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

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

from rest_framework import serializers

from .models import Profile

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()

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

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',)

from django.db import models

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

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

from rest_framework import serializers
from rest_framework_tricks.fields import ConstrainedFileField

from .models import Upload

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',
    )