How to make query for some fields of the models? - django

Question

I am makine business directory and i stucked in city and districts pages of business directory.
I made a simple business directory. All i want three queries;
Forexample category name: Manufacturing
First: I want one page like this: abc.com/directory/category/slug:slug(this slug means category name)/ ( I did, i have no problem with this page.
Second: City url like this abc.com/directory/category/slug:slug/(city name with slug style)/. forexample abc.com/category/manufacturing/london/
Third: District url like this abc.com/directory/category/slug:slug/(city name with slug style)/. forexample abc.com/category/manufacturing/london/southwark(district names)
I only did first one and second and third made me crazy...
I tried lots of things but failed...
Here are my codes:
models.py
from django.db import models
from django.urls import reverse
from tinymce import models as tinymce_models
# Create your models here.
class City(models.Model):
city = models.CharField(max_length=50)
slug = models.SlugField()
def __str__(self):
return str(self.city)
class District(models.Model):
district = models.CharField(max_length=50)
slug = models.SlugField()
city = models.ForeignKey(City, on_delete=models.CASCADE)
def __str__(self):
return str(self.district)
class FirmaCategory(models.Model):
title = models.CharField(max_length=255)
slug = models.SlugField()
class Meta:
verbose_name_plural = 'Firma Kategorileri'
def __str__(self):
return str(self.title)
class Firma(models.Model):
category = models.ForeignKey(FirmaCategory, related_name="Firma", on_delete=models.CASCADE)
title = models.CharField(max_length=255)
slug = models.SlugField()
adres = tinymce_models.HTMLField()
tel = tinymce_models.HTMLField()
website = tinymce_models.HTMLField()
email = tinymce_models.HTMLField()
intro = tinymce_models.HTMLField()
body = tinymce_models.HTMLField()
city = models.ForeignKey(City,related_name="FirmaCategory" ,on_delete=models.CASCADE)
district = models.ForeignKey(District,related_name="FirmaCategory", on_delete=models.CASCADE)
#url = models.CharField(max_length=255)
date_added = models.DateTimeField(auto_now_add=True)
class Meta:
verbose_name_plural = 'Firmalar'
def __str__(self):
return str(self.title)
def get_absolute_url(self):
return reverse('firma-frontpage')
views.py
from django.db.models import Q
from django.shortcuts import render
from .models import Firma, FirmaCategory, City, District
from django.utils.html import format_html
from django.views.generic import CreateView
from .forms import FirmaForm
# Create your views here.
def firmaana(request):
firmalar = Firma.objects.all()
context = {
'firmalar': firmalar
}
return render(request, 'firma/firma-frontpage.html', context)
def firmadetail(request, slug):
firmax = Firma.objects.get(slug=slug)
context = {
'firmax': firmax,
}
return render(request, 'firma/firma-detail.html', context)
def firmacategory(request, slug):
firmacategory = FirmaCategory.objects.get(slug=slug)
context = {
'firmacategory': firmacategory
}
return render(request, 'firma/firma-category.html', context)
urls. py
urlpatterns = [
path('kategory/city/<city>/', views.list_businesses_by_city, name='firmail'),
path("", views.firmaana, name="firma-frontpage"),
path("<slug:slug>/", views.firmadetail, name="firma-detail"),
path("kategory/<slug:slug>/", views.firmacategory, name="firma-category"),
path("1/add-firma/", FirmaEkle.as_view(), name="firma-ekle"),
path('tinymce/', include('tinymce.urls')),

Answer 1

If i understood you correctly...
views.py
def firmacity(request, city_slug):
try:
city = City.objects.get(slug=city_slug)
context = {
"firma" : Firma.objects.filter (city=city)
}
return render(request, tmpl, context)
except City.DoesNotExist:
context = {
"error" : "City does not exist"
}
return render(request, tmpl, context)
def firmadistrict(request, city_slug, dist_slug):
city = City.objects.get(slug=city_slug)
if city is not None:
district = District.obects.get(city=city)
if district is not None:
firma = Firma.objects.filter(district=district)
context = {
"firma" :firma,
}
return render(request, tmpl, context)
context = {
"error" : "Error in city/district"
}
return render(request, tmpl, context)
There are two different approaches for dealing with errors such as someone intentionally entering other values in browser url. Hope it helps.
I will edit here your second question. So if i understood you correctly. You want to retrieve companies data by categories. So that you can access fields (city, district) of that company in exact company category.
views.py
def firmabycategory(request, cat_slug):
try:
category = FirmaCategory.objects.get(slug=cat_slug)
companies = Firma.objects.filter(category=category)
context = {
'companies': companies,
}
return render(request, tmpl, context)
except FirmaCategory.DoesNotExist:
context = {
'error': 'Selected Category does not exist!',
}
return render(request, tmpl, context)
template(html):
{% for company in companies %}
name: {{ company.title }}
category: {{ company.category }}
city: {{ company.city }}
district: {{ company.district }}
{% endfor %}