How to access data from models in view in Django? - django

Question

So I have a models file:
import datetime
from django.db import models
class Organization(models.Model):
name = models.CharField(max_length=128, unique=True);
description = models.TextField(blank=True);
location = models.CharField(max_length=256, blank=True);
contact_email = models.EmailField(max_length=128, unique=True);
org_type = models.ForeignKey('OrganizationType');
created_at = models.DateTimeField(editable=False);
updated_at = models.DateTimeField();
def save(self, *args, **kwargs):
''' On save, update timestamps '''
datetime_now = datetime.datetime.now();
# If there's no ID, it's new
if not self.id:
self.created_at = datetime_now;
# Always update the modified at value
self.modified_at = datetime_now;
return super(User, self).save(*args, **kwargs);
class Meta:
app_label = 'bc';
And a view file Organization.py:
from django.shortcuts import render, redirect
from django.contrib import auth
from django.core.context_processors import csrf
from BearClubs.bc.forms.user import UserSignUpForm
from BearClubs.bc.models.organization import Organization
def directory(request):
first_50_clubs = [];
# get 50 clubs here
return render(request, 'directory.html' {'clubs': first_50_clubs});
I am really new to Django so pardon me. How do I go about getting the first 50 clubs in the first_50_clubs in the Organization.py view file?

Answer 1

According to the documentation, you can just use list slicing:
Use a subset of Python’s array-slicing syntax to limit your QuerySet
to a certain number of results. This is the equivalent of SQL’s LIMIT
and OFFSET clauses.
def directory(request):
first_50_clubs = Organization.objects.all()[:50]
return render(request, 'directory.html' {'clubs': first_50_clubs})
Also, you don't need to put semi-colons at the end of code lines in python.
Hope that helps.

Answer 2

You can get first 50 clubs in the first_50_clubs by following query :
first_50_clubs = Organization.objects.all().order_by('id')[:50]
It will fetch records when its got inserted .
If you want last inserted 50 records then just use - in order_by . like :
first_50_clubs = Organization.objects.all().order_by('-id')[:50]