text: from rest_framework import serializers
  
  from .models import Pricing
  
  
  class PricingSerializer(serializers.ModelSerializer):
      '''For Pricing Biz page and AngJS example Price calculaitons.'''
  
      class Meta:
          model = Pricing
          fields = ('id', 'tier', 'tier_name', 'desc', 'price', 'start', 'end',
              'created', 'modified')
          read_only_fields = ('created', 'modified',)