Gas Station Management System in Python using Django

from datetime import datetime from traceback import print_tb from django.shortcuts import redirect, render import json from django.contrib import messages from django.contrib.auth.models import User from django.http import HttpResponse from gsmsApp import models, forms from django.db.models import Q, Sum from django.contrib.auth import authenticate, login, logout, update_session_auth_hash from django.contrib.auth.decorators import login_required def context_data(): context = { 'page_name' : '', 'page_title' : '', 'system_name' : 'Gas Station Management System', 'topbar' : True, 'footer' : True, } return context def userregister(request): context = context_data() context['topbar'] = False context['footer'] = False context['page_title'] = "User Registration" if request.user.is_authenticated: return redirect("home-page") return render(request, 'register.html', context) @login_required def upload_modal(request): context = context_data() return render(request, 'upload.html', context) def save_register(request): resp={'status':'failed', 'msg':''} if not request.method == 'POST': resp['msg'] = "No data has been sent on this request" else: form = forms.SaveUser(request.POST) if form.is_valid(): form.save() messages.success(request, "Your Account has been created succesfully") resp['status'] = 'success' else: for field in form: for error in field.errors: if resp['msg'] != '': resp['msg'] += str('<br />') resp['msg'] += str(f"[{field.name}] {error}.") return HttpResponse(json.dumps(resp), content_type="application/json") @login_required def update_profile(request): context = context_data() context['page_title'] = 'Update Profile' user = User.objects.get(id = request.user.id) if not request.method == 'POST': form = forms.UpdateProfile(instance=user) context['form'] = form print(form) else: form = forms.UpdateProfile(request.POST, instance=user) if form.is_valid(): form.save() messages.success(request, "Profile has been updated") return redirect("profile-page") else: context['form'] = form return render(request, 'manage_profile.html',context) @login_required def update_password(request): context =context_data() context['page_title'] = "Update Password" if request.method == 'POST': form = forms.UpdatePasswords(user = request.user, data= request.POST) if form.is_valid(): form.save() messages.success(request,"Your Account Password has been updated successfully") update_session_auth_hash(request, form.user) return redirect("profile-page") else: context['form'] = form else: form = forms.UpdatePasswords(request.POST) context['form'] = form return render(request,'update_password.html',context) # Create your views here. def login_page(request): context = context_data() context['topbar'] = False context['footer'] = False context['page_name'] = 'login' context['page_title'] = 'Login' return render(request, 'login.html', context) def login_user(request): logout(request) resp = {"status":'failed','msg':''} username = '' password = '' if request.POST: username = request.POST['username'] password = request.POST['password'] user = authenticate(username=username, password=password) if user is not None: if user.is_active: login(request, user) resp['status']='success' else: resp['msg'] = "Incorrect username or password" else: resp['msg'] = "Incorrect username or password" return HttpResponse(json.dumps(resp),content_type='application/json') @login_required def home(request): context = context_data() context['page'] = 'home' context['page_title'] = 'Home' context['total_type'] = models.Petrol.objects.filter(delete_flag = 0, status = 1).count() context['petrols'] = models.Petrol.objects.filter(delete_flag = 0, status = 1).all() year = datetime.now().strftime("%Y") month = datetime.now().strftime("%m") day = datetime.now().strftime("%d") try: petrols = models.Petrol.objects.filter(delete_flag = 0, status = 1).all().values_list('id') total_amount = models.Sale.objects.filter(petrol__id__in = petrols).aggregate(Sum('amount'))['amount__sum'] if total_amount is None: total_amount = 0 except: total_amount = 0 context['total_sales'] = total_amount return render(request, 'home.html', context) def logout_user(request): logout(request) return redirect('login-page') @login_required def profile(request): context = context_data() context['page'] = 'profile' context['page_title'] = "Profile" return render(request,'profile.html', context) #Petrol Type @login_required def petrol_list(request): context =context_data() context['page_title'] = "Petrol Type List" context['page'] = "petrol_list" context['petrols'] = models.Petrol.objects.filter(delete_flag = 0).all() return render(request, "petrol_list.html", context) @login_required def manage_petrol(request,pk=None): context=context_data() context['petrol'] = {} if not pk is None: context['petrol'] = models.Petrol.objects.get(id=pk) return render(request,'manage_petrol.html', context) @login_required def view_petrol(request,pk=None): context=context_data() context['petrol'] = {} if not pk is None: context['petrol'] = models.Petrol.objects.get(id=pk) return render(request,'petrol_details.html', context) @login_required def save_petrol(request, pk = None): resp = {'status':'failed', 'msg':''} if not request.method =='POST': resp['msg'] = "No data send on this request" else: post = request.POST if not post['id'] == '': petrol = models.Petrol.objects.get(id = post['id']) form = forms.SavePetrol(request.POST, instance=petrol) else: form = forms.SavePetrol(request.POST) if form.is_valid(): form.save() if post['id'] == '': messages.success(request, "Petrol Type has been added successfully") else: messages.success(request, "Petrol Type has been updated successfully") resp['status'] = 'success' else: for field in form: for error in field.errors: if not resp['msg'] == '': resp['msg'] += str('<br />') resp['msg'] += str(f"[{field.label}] {error}") return HttpResponse(json.dumps(resp), content_type="application/json") @login_required def delete_petrol(request, pk = None): resp = {'status':'failed', 'msg':''} if pk is None: resp['msg'] = "Invalid Petrol Type ID" else: try: petrol = models.Petrol.objects.filter(id=pk).update(delete_flag = 1) resp['status'] = 'success' messages.success(request, "Petrol Type has been deleted successfully") except: resp['msg'] = "Invalid Petrol Type ID" return HttpResponse(json.dumps(resp), content_type="application/json") #Stock Record @login_required def stock_list(request): context =context_data() context[