akkefa

from django.core import serializers
from django.http import JsonResponse, HttpResponse

def home_page(request):
    rooms = Room.objects.all().prefetch_related(Prefetch('images', queryset=Image.objects.order_by('-created_at')))
    return HttpResponse(serializers.serialize('json', rooms), content_type='application/json')

akkefa

Your understanding is mostly correct. You use select_related when the object that you're going to be selecting is a single object, so OneToOneField or a ForeignKey. You use prefetch_related when you're going to get a "set" of things, so ManyToManyFields as you stated or reverse ForeignKeys. Just to clarify what I mean by "reverse ForeignKeys" here's an example:

class ModelA(models.Model):
    pass

class ModelB(models.Model):
    a = ForeignKey(ModelA)

ModelB.objects.select_related('a').all() # Forward ForeignKey relationship

akkefa

## Managing date at django database
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)

akkefa

//
//  RoundedCornersView.swift
//  Akkefa
//
//  Created by Ikram ali 
//

import UIKit

@IBDesignable

akkefa

package com.example.ikram.bathak.network;


import android.graphics.Bitmap;
import android.support.v4.util.LruCache;

import com.android.volley.RequestQueue;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.Volley;
import com.example.ikram.bathak.MyApplication;