from django.utils.timezone import now

from rest_framework import serializers

from musics.models import Music

class ToUpperCaseCharField(serializers.CharField):

def to_representation(self, value):

return value.upper()

class MusicSerializer(serializers.ModelSerializer):

days_since_created = serializers.SerializerMethodField()

singer = ToUpperCaseCharField()

class Meta:

model = Music

# fields = '__all__'

fields = ('id', 'song', 'singer', 'last_modify_date', 'created', 'days_since_created')

def get_days_since_created(self, obj):

return (now() - obj.created).days

class MusicSerializerV1(serializers.ModelSerializer):

class Meta:

model = Music

fields = ('id', 'song', 'singer')