text: from rest_framework import serializers
  from searchengine.models import Population, Hotel_model, Profile
  
  
  
  class Hotel_model_Serializer(serializers.HyperlinkedModelSerializer): # forms.ModelForm
      url         = serializers.SerializerMethodField(read_only=True)
      class Meta:
          model = Hotel_model
          fields = [
              'url',
               'id',
              'client',
  			'Room_type',
  			'price',
  			'Room_status',
  			# 'Room_pop',
  			'Reserved_from',
  			'Reserved_to',
  			'Room_number',
  			'Descrition',
  			'thumbnail',
  			'Reservation_ticket',
  			'Total_Amount'
          ]
          read_only_fields = ['id', 'client']
  
      
  
      def get_url(self, obj):      
          request = self.context.get("request")
          return obj.get_api_url(request=request)
  
      def validate_title(self, room_number):
          qs = Hotel_model.objects.filter(Room_number__iexact=room_number) 
          if self.instance:
              qs = qs.exclude(pk=self.instance.pk)
          if qs.exists():
              raise serializers.ValidationError("This room number already exists")
          return room_number