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Ich lerne das Django Framework, aber ich lasse mich mit einigen der Django Features beginnen, anstatt alles wieder zu tun. Ich fing an, Modellformen zu verwenden und sah auch diese raise ValidationError Eigenschaft, die angezeigt wird, wenn es irgendwelche Fehler gibt. Ich begann mit der Erstellung einer einfachen Benutzeranmeldung und Anmeldeformular aus und sieht wie folgt aus:Django ModelForm ValidationError wird nicht auf der Webseite angezeigt
Models.py
from __future__ import unicode_literals
from django.db import models
from django.core.exceptions import ValidationError
import re, bcrypt
def check_uname(value):
if not re.match('^[.a-zA-Z0-9_]+$', value):
raise ValidationError('Invalid Username')
def check_passwd(value):
if len(value) < 8 and not re.search(r'[A-Z]', value) and not re.search(r'[a-z]', value) and not re.search(r'[0-9]', value):
raise ValidationError('Invalid Password')
def login(uname, passwd):
there = User.objects.filter(user_name=uname).values()
if there:
if bcrypt.hashpw((passwd).encode(), there[0]['password'].encode()) != there[0]['password'].encode():
return "wrong"
else:
return there
else:
return "wrong"
class User(models.Model):
full_name = models.CharField(max_length=45)
user_name = models.CharField(max_length=45, validators=[check_uname])
email = models.EmailField(max_length=100)
password = models.CharField(max_length=100, validators=[check_passwd])
created_at = models.DateTimeField(auto_now_add = True)
updated_at = models.DateTimeField(auto_now = True)
Forms.py
from django import forms
from .models import User
from django.core.exceptions import ValidationError
import bcrypt
from django.db.models import Q
class loginForm(forms.ModelForm):
class Meta:
model = User
fields = ['user_name', 'password']
exclude = ['full_name', 'email']
widgets = {
'password': forms.PasswordInput(),
}
class regForm(forms.ModelForm):
password2 = forms.CharField(max_length=100, label="Comfirm password", required=True, widget=forms.PasswordInput())
class Meta:
model = User
fields = ['full_name', 'user_name', 'email', 'password']
widgets = {
'password': forms.PasswordInput(),
}
def clean(self):
if self.cleaned_data['password'] != self.cleaned_data['password2']:
print "Passwords do not match"
raise forms.ValidationError("Passwords do not match")
else:
user = User.objects.filter(Q(user_name=self.cleaned_data['user_name']) | Q(email=self.cleaned_data['email']))
if user:
print "Username or Email already in use"
raise forms.ValidationError("Username or Email already in use")
else:
print ("hashing password")
unhashed_passwd = self.cleaned_data['password'].encode()
self.cleaned_data['password'] = bcrypt.hashpw(unhashed_passwd, bcrypt.gensalt())
return (regForm, self).clean(*args, **kwargs)
Ansichten. py
from django.shortcuts import render, redirect
from django.contrib import messages
from . import forms
from . import models
import bcrypt
def login(request):
if 'user_id' not in request.session:
context = {'loginForm':forms.loginForm, 'regForm':forms.regForm}
if request.method == "POST" and 'password2' in request.POST:
reg_Form = forms.regForm(request.POST or None)
if reg_Form.is_valid():
print "It is inside valid"
print errors
reg_Form.save()
else:
form = forms.loginForm(request.POST or None)
if form.is_valid():
user_info = models.login(form.cleaned_data['user_name'], form.cleaned_data['password'])
if user_info == "wrong":
messages.error(request, 'Username or Password is invalid.')
else:
request.session['user_id'] = user_info[0]['id']
return render(request, 'index.html', context)
else:
return redirect('/')
Vorlage
<!DOCTYPE HTML>
<html>
<head>
<title></title>
<meta charset="utf-8">
{% load staticfiles %}
<link rel="stylesheet" type="text/css" href="{% static 'styles.css' %}">
{% load bootstrap3 %}
{% bootstrap_css %}
{% bootstrap_javascript %}
</head>
<body>
<nav class="navbar navbar-inverse navbar-top">
<div class="container">
<a class="navbar-brand" href="#">Ketan.io</a>
</div>
</nav>
{% bootstrap_messages %}
<div class="container">
<div class="row col-md-6">
<ol class="breadcrumb">
<h3><li>Login</li></h3>
</ol>
<form action="/login/" method="post" class="form-inline">
{% csrf_token %}
{% bootstrap_form_errors loginForm %}
{% bootstrap_form loginForm show_label=False %}
{% bootstrap_button "Login" button_type="submit" button_class="btn-primary" %}
</form>
</div>
<div class="margin_left col-md-6">
<ol class="breadcrumb">
<h3><li>Register</li></h3>
</ol>
<form action="/login/" method="post" class="form">
{% csrf_token %}
{% bootstrap_form_errors regForm %}
{% bootstrap_form regForm show_label=False %}
{% bootstrap_button "Register" button_type="submit" button_class="btn-primary" %}
</form>
</div>
</div>
</body>
</html>
Bitte lassen Sie mich wissen, wenn ich etwas falsch tue! Ich möchte, dass die ValidationError auf dem HTML erscheint. Ich bin mir sicher, Validierungen funktionieren, weil ich sie auch mit Hilfe von print-Anweisungen überprüfe. Ich bin sehr neu und lerne immer noch. Ich werde vielleicht noch nicht die Best Practices anwenden, werde aber mit der Übung definitiv besser werden.
Grüße und Prost.