Django CheatSheet，djangocheatsheet,from django.

Django CheatSheet，djangocheatsheet,from django.

from django.http import HttpResponseRedirectfrom django.shortcuts import render_to_response, get_object_or_404from django.contrib.auth.models import Userfrom django.http import HttpRequestfrom django.conf import settingsrequest.GET.keys()return render_to_response('content/auktionen/erstellen/wizard/zusammenfassung.html', locals())return render('content/auktionen/erstellen/cc_wizard/zusammenfassung.html', locals(), request)return HttpResponseRedirect('/login/?next=%s' % request.path)request.GET.get('q', '')username = request.POST['username']request.method == 'POST'HttpRequest.is_ajax()p = get_object_or_404(Poll, pk=poll_id)get_list_or_404()return render_to_response('polls/detail.html', {'poll': p})#------------- User ---------------------if request.user.is_authenticated():#User objects have two many-to-many fields: models.User. groups and user_permissions. User objects can access their related #objects in the same way as any other Django model:myuser.groups = [group_list]myuser.user_permissions = [permission_list]from django.contrib.auth.decorators import user_passes_test@user_passes_test(lambda u: u.has_perm('polls.can_vote'))def my_view(request):from django.contrib.auth.decorators import permission_requireddef my_view(request):    # ...my_view = permission_required('polls.can_vote', login_url='/loginpage/')(my_view)#-------------Model--------------------cheese_blog = Blog.objects.get(name="Cheddar Talk")Entry.objects.all()Entry.objects.filter(pub_date__year=2006)Blog.objects.filter(entry__author__name='Lennon')>>> b = Blog.objects.get(id=1)>>> b.entry_set.all() # Returns all Entry objects related to Blog.#Many to Manye = Entry.objects.get(id=3)e.authors.all() # Returns all Author objects for this Entry.e.authors.count()e.authors.filter(name__contains='John')a = Author.objects.get(id=5)a.entry_set.all() # Returns all Entry objects for this Author.#----------- Templates -------------{% if user.is_authenticated %}{% for group in user.groups.all %} {{group}}{% endfor %}settings.LOGIN_URL.#-------------Forms-------------------from django import formsfrom django.forms import ModelFormclass ContactForm(forms.Form):    subject = forms.CharField(max_length=100)    message = forms.CharField()    cc_myself = forms.BooleanField(required=False)f = ContactForm({'subject': 'hello'})def contact(request):    if request.method == 'POST': # If the form has been submitted...        form = ContactForm(request.POST) # A form bound to the POST data        if form.is_valid(): # All validation rules pass            # Process the data in form.cleaned_data            # ...            return HttpResponseRedirect('/thanks/') # Redirect after POST    else:        form = ContactForm() # An unbound form    return render_to_response('contact.html', {        'form': form,    })#------<form action="/contact/" method="POST">{{ form.as_p }}<input type="submit" value="Submit" />#------<form action="/contact/" method="POST">    <div class="fieldWrapper">        {{ form.subject.errors }}        <label for="id_subject">E-mail subject:</label>        {{ form.subject }}    </div></form>#-----<form action="/contact/" method="POST">    {% for field in form %}        <div class="fieldWrapper">            {{ field.errors }}            {{ field.label_tag }}: {{ field }}        </div>    {% endfor %}    <p><input type="submit" value="Send message" /></p></form>#----<form action="/comments/add/" method="POST">    {% with comment_form as form %}        {% include "form_snippet.html" %}    {% endwith %}    <p><input type="submit" value="Submit comment" /></p></form>#----class CommentForm(forms.Form):    name = forms.CharField(                widget=forms.TextInput(attrs={'class':'special'}))    url = forms.URLField()    comment = forms.CharField(               widget=forms.TextInput(attrs={'size':'40'}))#----Model Forms-----# Create the form class.class ArticleForm(ModelForm):    class Meta:        model = Article# Creating a form to add an article.form = ArticleForm()# Creating a form to change an existing article.article = Article.objects.get(pk=1)form = ArticleForm(instance=article)# Create a form instance from POST data.f = ArticleForm(request.POST)# Save a new Article object from the form's data.new_article = f.save()# Create a form to edit an existing Article.a = Article.objects.get(pk=1)f = ArticleForm(instance=a).save()# Create a form to edit an existing Article, but use# POST data to populate the form.a = Article.objects.get(pk=1)f = ArticleForm(request.POST, instance=a)f.save()#------class Musician(models.Model):  id = models.AutoField(primary_key=True)  first_name = models.CharField("Person's first name", max_length=30)  poll = models.ForeignKey(Poll)  toppings = models.ManyToManyField(Topping)  gender = models.CharField(max_length=1, choices=(('M', 'Male'),('F', 'Female'))  class Meta:        ordering = ["horn_length"]        verbose_name_plural = "oxen"