This is my custom context code for displaying cart
def cart(request):
return {'cart': Cart(request)}
and added this line to the context_processors in settings
'appname.context_processor.cart',
but not getting out put on base.html templates
template code
{% with total_items=cart|length %}
{% if cart|length > 0 %}
Your cart:
<a href="{% url 'cart_detail' %}">
{{ total_items }} item{{ total_items|pluralize }},
${{ cart.get_total_price }}
</a>
{% else %}
Your cart is empty.
{% endif %}
{% endwith %}
Related
I would like to implement custom pagination for my admin panel.
My url looks like the following:
http://localhost:8000/admin/items/?group_id=20
On this URL I do some work to filter the results using the parameter group_id (by overriding get_changelist method).
The page results are corrects, the problem is my pagination ending up like this http://localhost:8000/admin/items/?p=1 whereas I would like the URL to be http://localhost:8000/admin/items/?group_id=20&p=1 and keep the parameter.
Basically I want the same result as How to paginate Django with other get variables? but using Django admin.
How can I keep the parameter along with the pagination?
I've tried overriding pagination.html file but without any success.
Thank you.
Edit
I've tried overriding pagination.html but request.GET.items is still empty (even if my settings file is well configured)
{% load admin_list %}
{% load i18n %}
{% load content_extras %}
<p class="paginator">
{% if pagination_required %}
{% for i in page_range %}
{{ i }}
{% endfor %}
{% endif %}
{{ cl.result_count }} {% if cl.result_count == 1 %}{{ cl.opts.verbose_name }}{% else %}{{ cl.opts.verbose_name_plural }}{% endif %}
{% if show_all_url %}{% trans 'Show all' %}{% endif %}
{% if cl.formset and cl.result_count %}<input type="submit" name="_save" class="default" value="{% trans 'Save' %}">{% endif %}
</p>
FOUND A SOLUTION:
1/ Override changelist_view on admin.py and pass the extra data
def changelist_view(self, request, extra_context=""):
response = super(ItemAdmin, self).changelist_view(request, extra_context)
group_id = request.GET.get('group_id', None)
if group_id:
extra_context = {
'group_id': group_id,
}
response.context_data.update(extra_context)
return TemplateResponse(request, "admin/changelist.html", response.context_data)
2/ Create changelist.html file based on django admin template (copy/paste)
Add {% load content_extras %} at the top of the file (line 3)
Change line {% block pagination %}{% pagination cl %}{% endblock %} with {% block pagination %}{% custom_pagination cl %}{% endblock %}
3/ Create content_extras.py under templatetags folder and write custom_pagination function
from django import template
from django.contrib.admin.templatetags import admin_list
register = template.Library()
#register.inclusion_tag('admin/pagination.html', takes_context=True)
def custom_pagination(context, cl):
pagination = admin_list.pagination(cl)
if 'group_id' in context:
params = (('group_id', context['group_id']),)
pagination['params'] = params
return pagination
4/ Create pagination.html (same location as changelist.html)
{% load admin_list %}
{% load i18n %}
{% load content_extras %}
<p class="paginator">
{% if pagination_required %}
{% for i in page_range %}
{{ i }}
{% endfor %}
{% endif %}
{{ cl.result_count }} {% if cl.result_count == 1 %}{{ cl.opts.verbose_name }}{% else %}{{ cl.opts.verbose_name_plural }}{% endif %}
{% if show_all_url %}{% trans 'Show all' %}{% endif %}
{% if cl.formset and cl.result_count %}<input type="submit" name="_save" class="default" value="{% trans 'Save' %}">{% endif %}
</p>
If you activated django.template.context_processors.request in your settings, you can access parameters from your request directly from your template.
And then you can access the parameters in your templates directly. Something like:
href="?page={{ data.next_page_number }}{% for key, value in request.GET.items %}{% if key != 'page' %}&{{ key }}={{ value }}{% endif %}{% endfor %}"
Research (context_processors.request was moved from django.core to django.templates some time ago)
I have a page that shows a list of objects and I want to add a button beside each one to enable the user to delete it. I've found a few questions about similar scenarios online but for some reason I keep getting errors when I try to replicate the solutions.
Here is the delete function in views.py:
def delete_dish(request, pk):
query = Dish.objects.get_object_or_404(pk)
supermenu = query['supermenu'].pk
query.delete()
return redirect('foodmenu:menu', supermenu)
Here is the form in the HTML template:
{% if not supermenu.dish_set.count == 0 %}
<ul>
{% for dish in supermenu.dish_set.all %}
<li>
{{ dish.name }} - {{ dish.description }}
<form action="{% url 'foodmenu:delete_dish' dish.id %}" method="POST">
{% csrf_token %}
<button type="submit">X</button>
</form>
</li>
{% if not dish.price_set.count == 0 %}
<ul>
{% for price in dish.price_set.all %}
{% if price.label %}
<li>{{ price.label }}: {{ price.cost }}</li>
{% else %}
<li>{{ price.cost }}</li>
{% endif %}
{% endfor %}
</ul>
{% endif %}
{% endfor %}
</ul>
{% else %}
<p>No dishes on this menu!</p>
{% endif %}
And here is the urls.py:
app_name = 'foodmenu'
urlpatterns = [
...
path('dish/delete/<int:dish.id>', views.delete_dish, name="delete_dish")
]
When I click the button, the browser goes to ./dish/delete/1 (1 being the pk of the object), but Django returns a 404 error.
Instead of query = Dish.objects.get_object_or_404(pk) you should use get_object_or_404 shortcut:
from django.shortcuts import get_object_or_404
from django.views.decorators.http import require_POST
#require_POST
def delete_dish(request, pk):
if request.method
query = get_object_or_404(Dish, pk=pk)
supermenu = query.supermenu.pk
query.delete()
return redirect('foodmenu:menu', supermenu)
Also change your url pattern to this:
path('dish/delete/<int:pk>/', views.delete_dish, name="delete_dish")
UPD
As #daniherrera mentioned in his comment, you probably want to check request's method, to prevent accidental deletions. For this you can use require_POST decorator.
I cannot get the contents of an inclusion_tag to display. I am not getting an errors so i know that the tag is registering and I am almost certain that it is loading correctly. The tag is created in crudapp/templatetags/crudapp_tags.py
from django import template
register = template.Library()
#register.inclusion_tag("forum.html")
def results(poll):
form = 'blah'
return {'form': form}
templates/forum.html
{% extends 'index.html' %}
{% load crudapp_tags %}
{% results poll %}
<p>aaa</p>
{% block homepage %}
<p>bbb</p> <!-- Only this displays -->
{% if form %}
<p>Form exists</p>
{% endif %}
{% for item in form %}
<p>This is {{ item }}</p>
{% endfor %}
<div>
<p>{% if user.is_authenticated %}Add a New Topic: <span class="glyphicon glyphicon-plus"></span>{% endif %}</p>
</div>
<div>
<p>{{ totalposts.count }} posts, {{ totaltopics.count }} topics, {{ totalusers.count }} users, {{ totalviews.numviews}} views</p>
</div>
{% endblock %}
The file set up is as follows,
If you are using an inclusion tag, then the tag renders another template. You need to move the code that uses form out of forum.html and into a new template, e.g. results.html
results.html
{% if form %}
<p>Form exists</p>
{% endif %}
{% for item in form %}
<p>This is {{ item }}</p>
{% endfor %}
Then change your tag to use this template
#register.inclusion_tag("results.html")
def results(poll):
form = 'blah'
return {'form': form}
Finally, since you are extending a template, you need to move then tag into a block, otherwise the result won't be used.
{% block homepage %}
{% results poll %}
...
{% endblock %}
If you want to add an item to the template context instead of rendering another template, then you want a simple tag instead.
#register.simple_tag
def fetch_result():
result = ['foo', 'bar']
return result
Then in your template:
{% fetch_result as result %}
{% for item in result %}
<p>This is {{ item }}</p>
{% endfor %}
The {% fetch_result as result %} works for simple tags in Django 1.9+. In earlier versions, you want an assignment tag.
I need to display number of objects at main django site admin page.
For example, in list of models I need to display
Elephants (6)
instead of
Elephants
I added this code to my model:
class Elephant(models.Model):
....
class Meta:
verbose_name_plural = 'Elephants ' + '(' + unicode(count_elephants()) + ')'
where count_elephants() calculates number of objects. The problem is that verbose_name_plural is calculated at server start and is not called when I delete/insert objects, so this calculated value becomes irrelevant.
Is it possible to do it in correct way?
Thanks!
Since verbose_name_plural is used in many other ways, a better way to do this will be to change the admin index view and admin template.
However, since the admin app can change, this is probably tied to a specific version of
django. I am attaching for example the modified admin taken from django 1.2.5.
(Note: I will use an in place replacement for the index method, but it will be probably better to subclass it instead of replacing the method)
As a start, copy from django/contrib/admin/sites.py the AdminSite.index method and it's required imports, and modify it to include counts (one line changed, look for 'THIS LINE WAS ADDED"). Add it to any of your admin.py files or somewhere else appropriate:
from django.utils.text import capfirst
from django import template
from django.shortcuts import render_to_response
from django.views.decorators.cache import never_cache
from django.utils.translation import ugettext as _
def index_with_count(self, request, extra_context=None):
"""
Displays the main admin index page, which lists all of the installed
apps that have been registered in this site.
"""
app_dict = {}
user = request.user
for model, model_admin in self._registry.items():
app_label = model._meta.app_label
has_module_perms = user.has_module_perms(app_label)
if has_module_perms:
perms = model_admin.get_model_perms(request)
# Check whether user has any perm for this module.
# If so, add the module to the model_list.
if True in perms.values():
model_dict = {
'name': capfirst(model._meta.verbose_name_plural),
'admin_url': mark_safe('%s/%s/' % (app_label, model.__name__.lower())),
'perms': perms,
'count': model.objects.count(), # THIS LINE WAS ADDED
}
if app_label in app_dict:
app_dict[app_label]['models'].append(model_dict)
else:
app_dict[app_label] = {
'name': app_label.title(),
'app_url': app_label + '/',
'has_module_perms': has_module_perms,
'models': [model_dict],
}
# Sort the apps alphabetically.
app_list = app_dict.values()
app_list.sort(lambda x, y: cmp(x['name'], y['name']))
# Sort the models alphabetically within each app.
for app in app_list:
app['models'].sort(lambda x, y: cmp(x['name'], y['name']))
context = {
'title': _('Site administration'),
'app_list': app_list,
'root_path': self.root_path,
}
context.update(extra_context or {})
context_instance = template.RequestContext(request, current_app=self.name)
return render_to_response(self.index_template or 'admin/index.html', context,
context_instance=context_instance
)
site.index = never_cache(type(site.index)(index_with_count, site, AdminSite))
Now copy the django/contrib/admin/templates/admin/index.html file into admin/index.html in any of your templates folders to override the original template and modify it to show the counts:
{% extends "admin/base_site.html" %}
{% load i18n %}
{% block extrastyle %}{{ block.super }}<link rel="stylesheet" type="text/css" href="{% load adminmedia %}{% admin_media_prefix %}css/dashboard.css" />{% endblock %}
{% block coltype %}colMS{% endblock %}
{% block bodyclass %}dashboard{% endblock %}
{% block breadcrumbs %}{% endblock %}
{% block content %}
<div id="content-main">
{% if app_list %}
{% for app in app_list %}
<div class="module">
<table summary="{% blocktrans with app.name as name %}Models available in the {{ name }} application.{% endblocktrans %}">
<caption>{% blocktrans with app.name as name %}{{ name }}{% endblocktrans %}</caption>
{% for model in app.models %}
<tr>
<th scope="row">
{% if model.perms.change %}
{{ model.name }}
{% else %}
{{ model.name }}
{% endif %}
({{ model.count }})
</th>
{% if model.perms.add %}
<td>{% trans 'Add' %}</td>
{% else %}
<td> </td>
{% endif %}
{% if model.perms.change %}
<td>{% trans 'Change' %}</td>
{% else %}
<td> </td>
{% endif %}
</tr>
{% endfor %}
</table>
</div>
{% endfor %}
{% else %}
<p>{% trans "You don't have permission to edit anything." %}</p>
{% endif %}
</div>
{% endblock %}
{% block sidebar %}
<div id="content-related">
<div class="module" id="recent-actions-module">
<h2>{% trans 'Recent Actions' %}</h2>
<h3>{% trans 'My Actions' %}</h3>
{% load log %}
{% get_admin_log 10 as admin_log for_user user %}
{% if not admin_log %}
<p>{% trans 'None available' %}</p>
{% else %}
<ul class="actionlist">
{% for entry in admin_log %}
<li class="{% if entry.is_addition %}addlink{% endif %}{% if entry.is_change %}changelink{% endif %}{% if entry.is_deletion %}deletelink{% endif %}">
{% if entry.is_deletion %}
{{ entry.object_repr }}
{% else %}
{{ entry.object_repr }}
{% endif %}
<br/>
{% if entry.content_type %}
<span class="mini quiet">{% filter capfirst %}{% trans entry.content_type.name %}{% endfilter %}</span>
{% else %}
<span class="mini quiet">{% trans 'Unknown content' %}</span>
{% endif %}
</li>
{% endfor %}
</ul>
{% endif %}
</div>
</div>
{% endblock %}
This will do it.
(You will still need to modify the app_index view to see the counts correctly in the app index pages, I leave this as an exercise to you :-)
A 2022 update using Django 4.0
Subclass the default admin site, see the official Django doc on subclassing the AdminSite.
in the subclass, overwrite the _build_app_dict() method to add count in its model_dict as in:
model_dict = {
"name": capfirst(model._meta.verbose_name_plural),
"object_name": model._meta.object_name,
"perms": perms,
"admin_url": None,
"add_url": None,
"count": model.objects.count(), # THIS IS ALL YOU NEED TO ADD
}
Override the default admin site for your project with the subclass that we have created and optimized. see the official Django doc overriding the default admin site.
Override the app_list.html template if you haven't already. Inside your app_list.html template, you can now use the model.count variable like so {{ model.count }}. see the official Django docs on overriding templates.
I am a Django newbie and am unable to achieve something trivial. Please help me with this.
I am setting a variable pgurl in my views.py
Am able to access the variable {{pgurl}} in my with_tag.html template. This template includes a pagination.html template into itself
In pagination.html I am unable to use the variable {{pgurl}} and nothing is printed
How can I get this variable passed into the included template?
views.py
def with_tag(request, tag, template_name='main/with_tag.html', current_page=1, pgurl=''):
if request.method == 'GET':
query_tag = Tag.objects.get(name=tag)
primes = TaggedItem.objects.get_by_model(Prime, query_tag)
primes = primes.order_by('-date')
request.page = current_page
tcm_pp = TCM_ITEMS_PER_PAGE
pgurl = request.path
else:
return HttpResponseRedirect(request.path)
return direct_to_template(request, template_name, { 'primes' : primes, 'prime_total' : Prime.objects.count(), 'now': datetime.now(), 'page' : current_page, 'tcm_pp' : tcm_pp, 'tag' : tag, 'pgurl' : pgurl })
with_tag.html
{% extends "base.html" %}
{% load comments %}
{% load pagination_tags %}
...
{% include "pagination.html" %}
{% paginate %}
pagination.html
{% if is_paginated %}
{% load i18n %}
<div class="pagination">
{% if page_obj.has_previous %}
‹‹ {% trans "previous" %}
{% else %}
<span class="disabled prev">‹‹ {% trans "previous" %}</span>
{% endif %}
{% for page in pages %}
{% if page %}
{% ifequal page page_obj.number %}
<span class="current page">{{ page }}</span>
{% else %}
{{ page }}
{% endifequal %}
{% else %}
...
{% endif %}
{% endfor %}
{% if page_obj.has_next %}
{% trans "next" %} ››
{% else %}
<span class="disabled next">{% trans "next" %} ››</span>
{% endif %}
</div>
{% endif %}
It will be helpful if you post the output of the rendered page. The context should get passed, might be your template tags instead. Try to do assert and check to see if the variables were passed correctly.