carwin_activity/apps/customer/activity/serializers.py

# coding=utf-8

from django.conf import settings

from rest_framework import serializers
from apps.activity.models import Activity, ActivityDetails


class ActivitySerializer(serializers.ModelSerializer):
    pic = serializers.SerializerMethodField()
    describe = serializers.SerializerMethodField()
    details = serializers.SerializerMethodField()

    class Meta:
        model = Activity
        fields = ('branch_address', 'branch_name', 'branch_tel', 'describe', 'title', 'pic', 'details',)

    def get_details(self, obj):
        rows = ActivityDetails.objects.filter(main=obj, delete=False).values('name', 'amount', 'id')
        data = []
        for row in rows:
            item = {
                'id': row['id'],
                'name': row['name'],
                'amount': row['amount'],
            }
            data.append(item)
        return data

    def get_pic(self, obj):
        if obj.pic:
            return settings.MEDIA_URL + obj.pic
        return ''

    def get_describe(self, obj):
        return ''