Firstly I Have More than 1 Million Data In my database , while i want to
perform aggregation or annotation or filter it took huge time , i have to
show all data at a time,,, i use select_related() for foreign key but i
want to optimize database hitting , like i want to fetch all data from
database in first database hit and convert them into dictionary or list and
perform another queries into dictionary or list without hitting database i
hope it can optimize database hit Example : In Laravel I Fetch All data
from database and convert it into Array while i have to perform queries
into it i convert them into collect() and perform queries , and it dont hit
the database .
[a link ]:(https://laravel.com/docs/5.8/collections) !
I Can perform this in Django ???
On Wed, Aug 28, 2019 at 11:51 PM 'Amitesh Sahay' via Django users <
django-users@googlegroups.com> wrote:
> Hey Kean,
>
> I am already working on some Djago user authentication . Below are my
> codes, may be they would help you.
>
> views.py
>
> from django.shortcuts import render, redirect
> from django.contrib.auth import authenticate, login, logout
> from django.contrib import messages
> from django.contrib.auth.forms import UserCreationForm, UserChangeForm
> from templates.authenticate.forms import SignUpForm
>
>
> def home(request):
> return render(request, 'authenticate/home.html', {})
>
>
> def login_user(request):
> if request.method == 'POST':
> username = request.POST['username']
> password = request.POST['password']
> user = authenticate(request, username=username, password=password)
>
> if user is not None:
> login(request, user)
> messages.success(request, 'you have loggedin success')
> return redirect('home')
> else:
> messages.success(request, 'Error loggin in....')
> return redirect('login')
>
> else:
> return render(request, 'authenticate/login.html', {})
>
>
> def logout_user(request):
> logout(request)
> messages.success(request, 'You have been logged out...')
> return redirect('home')
>
>
> def register_user(request):
> if request.method == 'POST':
> form = SignUpForm(request.POST)
> if form.is_valid():
> form.save()
> username = form.cleaned_data['username']
> password = form.cleaned_data['password1']
> user = authenticate(request, username=username, password=password)
> login(request, user)
> messages.success(request, 'registration successfull....')
> return redirect('home')
> else:
> form = SignUpForm()
> context = {'form': form}
> return render(request, 'authenticate/register.html', context)
>
>
> def edit_profile(request):
> if request.method == 'POST':
> form = UserChangeForm(request.POST, instance=request.user)
> if form.is_valid():
> form.save()
> username = form.cleaned_data['username']
> password = form.cleaned_data['password1']
> user = authenticate(request, username=username, password=password)
> login(request, user)
> messages.success(request, 'registration successfull....')
> return redirect('home')
> else:
> form = UserChangeForm(instance=request.user)
>
> context = {'form': form}
> return render(request, 'authenticate/edit_profile.html', context)
>
> forms.py
>
> from django.contrib.auth.forms import UserCreationForm
> from django import forms
> from django.contrib.auth.models import User
>
>
> class SignUpForm(UserCreationForm):
> email = forms.EmailField(widget=forms.TextInput(attrs={'class':
> 'form-control', 'placeholder': 'email address'}))
> first_name = forms.CharField(max_length=100,
> widget=forms.TextInput(attrs={'class': 'form-control', 'placeholder': 'first
> name'}))
> last_name = forms.CharField(max_length=100,
> widget=forms.TextInput(attrs={'class': 'form-control', 'placeholder': 'last
> name'}))
>
>
> class Meta:
> model = User
> fields = ('username', 'first_name', 'last_name', 'email', 'password1',
> 'password2')
>
>
> def __init__(self, *args, **kwargs):
> super(SignUpForm, self).__init__(*args, **kwargs)
>
> self.fields['username'].widget.attrs['class'] = 'form-control'
> self.fields['password1'].widget.attrs['class'] = 'form-control'
> self.fields['password2'].widget.attrs['class'] = 'form-control'
>
> I have also attached the HTML pages with this email in the txt format. I
> hope that helps you. Below is the django official doc link that I am
> referring.
>
>
> https://docs.djangoproject.com/en/2.2/topics/auth/default/#auth-web-requests
>
> Regards,
> Amitesh Sahay
>
>
> On Wednesday, 28 August, 2019, 10:24:38 pm IST, Kean <kean...@gmail.com>
> wrote:
>
>
> Hi,
> New to Django.
>
> I've created a registration form which inherits from a User form.
> The issue is none of the validators are working. e.g reporting to user
> password miss-match, or any other error if user enters data incorrect to
> validation.
> The form simply validates with errors and redirect user to to their user
> page (as defined,).
>
> Please can anyone help or advise, as I though the validators were an
> inherent part of the django forms?
>
> forms.py
>
> class CRegisterForm(UserCreationForm):
> email = forms.EmailField(max_length=30, required=True)
>
> class Meta:
> model = User
> fields = ['username', 'email', 'password1', 'password2']
>
> views.py
>
> def cregister(request):
> if request.method == "POST":
> form = CRegisterForm(request.POST)
> if form.is_valid():
> data = form.cleaned_data
> form.save()
> return redirect('cpage')
> else:
> form = CRegisterForm()
> return render(request, 'cregister.html', {'form': form})
>
> urls.py
>
> path('login/customer/', views.cpage, name='cpage'),
>
> html
>
> {% load crispy_forms_tags %}
> <!DOCTYPE html>
> <html>
> <head>
> <title>Customer</title>
> </head>
> <br>
> <body>
> <div>
> <div class = "container" >
> <form method="POST">
> {% csrf_token %}
> <fieldset class="form-group">
> <legend class="border-bottom mb-3">Customer Login</legend>
> {{ form|crispy }}
> </fieldset>
> <div class="form-group">
> <button class="btn btn-outline-info" type="submit">Login</button>
> </div>
> {% if messages %}
> {% for messages in messages %}
> <div class="alert alert-{{ message.tags }}">
> {{ message }}
> </div>
> {% endfor %}
> {% endif %}
> </form>
> <div class="border-top pt-3">
> <small class = "text-muted">
> Need a customer account <a class="ml-2" href="cregister">Customer
> register</a>
> </small>
> </div>
> </div>
> </body>
> </html>
>
>
>
> Best,
>
> K
>
>
>
>
>
>
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>
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