Re: adding user instance to the comments constructor for a dynamic comment form

[Evan H. Carmi]

On Sun, 29 Aug 2010 16:08:45 -0700 (PDT)
Cody Django  wrote:

> I'd like to have the comment form contain a captcha if the user is
> logged in.
Do you mean "have the comment form contain a captcha if the user *is
not* logged in?

-E

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saving an object twice

[Evan H. Carmi]

Hi All,

I have a model CampaignYear that is registered with django-reversion so that 
when a CampaignYear instance is saved a django-reversion Version object is 
also saved. This worked great until I wanted to do the following:

add a field to CampaignYear, last_editor(), that queries the latest Version 
object related to my CampaignYear instance and returns a string combining the 
user, date, and comment associated with that version. My code for this is 
below:

def last_editor(self):
# Get latest version from reversion
version = Version.objects.get_for_date(self, datetime.datetime.now())
# Get data from version
user = version.revision.user
date_strf = version.revision.date_created.strftime("%b %d, %I:%M%p")
comment = version.revision.comment
last_editor = (u'%s : %s - %s' % (user, date_strf, comment))
return last_editor

This works, but is very database intensive and slow. So I want to create a 
CharField in CampaignYear called last_editor_str that contains the value 
returned by last_editor(), so that this computation is only done when I save 
the object, rather than every time I want to view it.

My problem is here: the Version object associated with each CampaignYear isn't 
created until after I save CampaignYear. So I need to save CampaignYear once 
and then save it again with last_editor_str populated from my last_editor() 
function.

So my question is how should I go about doing this double save?

One thing I tried was using 

super(CampaignYear, self).save(*args, **kwargs)

twice in CampaignYear.save(). Once before last_editor_str is populated and 
then again after. This didn't work. I don't know if you can use super().save() 
twice?

I also tried using signals:
def camp_year_post_save(sender, **kwargs):
if (sender.last_editor_str == ''):
try:
sender.last_editor_str = sender.get_last_editor()
sender.save()
except Version.DoesNotExist:
pass

post_save.connect(camp_year_post_save, sender=CampaignYear)

However, this threw a 
AttributeError: type object 'CampaignYear' has no attribute 'last_editor_str'
error.

If I can clarify anything please let me know,
Thanks,
Evan



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Where is the source code for Practical Django Projects?

[Evan H. Carmi]

Hi,

I am reading Practical Django Projects but am unable to find the online
source code. Does anyone know where this is located? I would think that
it would be at http://www.apress.com/book/view/1590599969. However, that
doesn't seem to be the case.

Thanks,
Evan

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embedding django-contact-form in a generic view

[Evan H. Carmi]

Hi,

I have a archive index generic view that is working at /portfolio/.

I also have a http://code.google.com/p/django-contact-form/ contact form
at /contact/.

I want to have the form currently located at /contact/ be on the same
page as my generic view at /portfolio/.

I am wondering what is the simplest way to achieve this.

Thank You,
Evan

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Re: solving fixture data conflicts

[Evan H. Carmi]

Russell Keith-Magee wrote:
> The only real solution at present is to avoid serializing content
> types whenever possible (i.e., by not dumping the contenttypes
> application). If your fixture already has content types, manually
> delete them from the fixture before loading.

How can I go about manually deleting the content types? Is there
something I should look for in my file exported with dumpdata?

Evan

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solving fixture data conflicts

[Evan H. Carmi]

Hi,

I am trying to loaddata from a file, bmdata.xml and getting an error:
Problem installing fixture 'bmdata.xml': duplicate key violates unique
constraint "django_content_type_app_label_key"

I understand that there is a conflict in the fixture data. However, I
don't know how to solve it. I only ran syncdb before loaddata, and did
not create any content.

Thanks,
Evan

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fastcgi problem: runfcgi not creating socket file

[Evan H. Carmi]

Hi,

I am having some trouble trying to setup Django SVN on a shared web host
with lighttpd and flup (Joyent's Shared Accelerator).

I have setup lighttpd and it runs seemingly fine.

I am unable to get the fastcgi socket to be created with the runfcgi
command. In particular, the command I am testing testing with is:

/usr/local/bin/python manage.py --verbosity=2 runfcgi method=prefork
socket="/users/home/carmi/django_projects/binarymanipulations/binarymanipulations.socket
pidfile="/users/home/carmi/django_projects/binarymanipulations.pid

I can run this command without any problems, but a socket file is not
created. (The pidfile is created.) Even with --verbosity=2 I do not get
any error messages.

I have the following in my lighttpd error log file:

2008-02-11 05:49:04: (log.c.75) server started
2008-02-11 05:49:32: (mod_fastcgi.c.1731) connect failed: No such file
or directory on
unix:/users/home/carmi/django_projects/binarymanipulations/binarymanipulations.socket
2008-02-11 05:49:32: (mod_fastcgi.c.2885) backend died; we'll disable it
for 5 seconds and send the request to another backend instead:
reconnects: 0 load: 1
2008-02-11 05:49:34: (mod_fastcgi.c.3496) all handlers for
/binarymanipulations.fcgi/ on /binarymanipulations.fcgi are down.
2008-02-11 05:49:38: (mod_fastcgi.c.2703) fcgi-server re-enabled:
unix:/users/home/carmi/django_projects/binarymanipulations/binarymanipulations.socket

Is there someplace else I can look for some errors or other information
that will help me get this running? Or anything else I should do?

Thanks,
Evan

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truncating posts with markdown

[Evan H. Carmi]

Hi,

I ran across a problem today with the list view of my blog. I am using
markdown to create html tags for my post. In the list view I use the
template tag truncate to cut off the number of words. This leaves open
the html tags that markdown created.

I am wondering what ways people get around this?

Thanks,
Evan

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request.path in a context processor

[Evan H. Carmi]

Hi,
Here I have a context processor --> http://dpaste.com/18402/

I have {{ base_path }} in one of my templates but it isn't returning
anything. I am not sure if I can use request.path the way I am using it.
 Any ideas?

Thanks,
Evan

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type object 'HtmlFormatter' has no attribute 'encoding'

[Evan H. Carmi]

Hi,

I am trying to get pygments and markdown highlighting working on my blog.

When I try and save a post that has ` in it I get an attribute error.

My models are (more beautifully here http://dpaste.com/17230/) ignore
the _highlight_python_code part. that was from a previous attempt:

from django.db import models
import datetime

# Create your models here.

class Tag(models.Model):
slug = models.SlugField(
prepopulate_from=("name",),
help_text='Automatically prepopulated from name',
)
name = models.CharField(maxlength=30)
description = models.TextField(
help_text='Short summary of this tag'
)
def __str__(self):
return self.name

def get_absolute_url(self):
return "/blog/tag/%s/" % self.slug

class Admin:
list_display = ('name', 'slug', )
search_fields = ('name', 'description',)

class Entry(models.Model):
title = models.CharField(maxlength=255, core=True,
unique_for_date="pub_date")
pub_date = models.DateTimeField(core=True)
slug = models.SlugField(maxlength=30, prepopulate_from= ['title'])
body = models.TextField(core=True, help_text='Use http://daringfireball.net/projects/markdown/syntax;>Markdown-syntax')
body_html = models.TextField(blank=True, null=True)
use_markdown = models.BooleanField(default=True)
tags = models.ManyToManyField(Tag,
filter_interface=models.HORIZONTAL)

class Admin:
fields = (
(None, {'fields': ('slug', 'title', 'tags',
'use_markdown', 'pub_date', 'body', 'body_html',)}),
)

def __str__(self):
return self.title

def get_absolute_url(self):
return "/blog/%s/%s/" %
(self.pub_date.strftime("%Y/%m/%d").lower(), self.slug)

#from
http://www.unessa.net/en/hoyci/2006/11/highlighting-code-using-pygments-and-beautiful-soup/

def _highlight_python_code(self):
from pygments import highlight
from pygments.lexers import PythonLexer
from pygments.formatters import HtmlFormatter
from BeautifulSoup import BeautifulSoup

soup = BeautifulSoup(self.body)
python_code = soup.findAll("code")

if self.use_markdown:
import markdown

index = 0
for code in python_code:
code.replaceWith('mark %i' % index)
index = index+1

markdowned = markdown.markdown(str(soup))
soup = BeautifulSoup(markdowned)
markdowned_code = soup.findAll("p", "python_mark")

index = 0
for code in markdowned_code:

code.repalceWith(highlight(python_code[index].renderContents(),
PythonLexer(), HtmlFormatter()))
index = index+1
else:
for code in python_code:
code.replaceWith(highlight(code.string,
PythonLexer(), HtmlFormatter()))

return str(soup)


#from dpaste.com/16735
def markup(self, value):
import re
from BeautifulSoup import BeautifulSoup
from pygments import highlight
from pygments.formatters import HtmlFormatter
from pygments.lexers import guess_lexer, get_lexer_by_name
from markdown import markdown

value = markdown(value)
tree = BeautifulSoup(value)
try:
for code in tree.findAll("code"):
print code.contents[0].__dict__
lexer = get_lexer_by_name('python',
stripall=True)
formatter = HtmlFormatter
new_content =
highlight(code.contents[0], lexer, formatter)
code.replaceWith(new_content)
value = str(tree)
except IndexError:
pass
return value



def save(self):
self.body_html = self.markup(self.body)
super(Entry,self).save()


I was trying to save a post with the following content:

`print "hello world"`

I am using a PostgreSQL database.

Thanks,
Evan

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Pygments + Markdown

[Evan H. Carmi]

Hi,

I am trying setup pygments and markdown described here:
http://www.unessa.net/en/hoyci/2006/11/highlighting-code-using-pygments-and-beautiful-soup/

My Model.py is:
(Also here http://dpaste.com/hold/16731/)
-
from django.db import models
import datetime

# Create your models here.

class Tag(models.Model):
slug = models.SlugField(
prepopulate_from=("name",),
help_text='Automatically prepopulated from name',
)
name = models.CharField(maxlength=30)
description = models.TextField(
help_text='Short summary of this tag'
)
def __str__(self):
return self.name

def get_absolute_url(self):
return "/blog/tag/%s/" % self.slug

class Admin:
list_display = ('name', 'slug', )
search_fields = ('name', 'description',)

class Entry(models.Model):
title = models.CharField(maxlength=255, core=True,
unique_for_date="pub_date")
pub_date = models.DateTimeField(core=True)
slug = models.SlugField(maxlength=30, prepopulate_from= ['title'])
body = models.TextField(core=True, help_text='Use http://daringfireball.net/projects/markdown/syntax;>Markdown-syntax')
body_html = models.TextField(blank=True, null=True)
use_markdown = models.BooleanField(default=True)
tags = models.ManyToManyField(Tag,
filter_interface=models.HORIZONTAL)

class Admin:
fields = (
(None, {'fields': ('slug', 'title', 'tags',
'use_markdown', 'pub_date', 'body', 'body_html',)}),
)

def __str__(self):
return self.title

def get_absolute_url(self):
return "/blog/%s/%s/" %
(self.pub_date.strftime("%Y/%m/%d").lower(), self.slug)

#from
http://www.unessa.net/en/hoyci/2006/11/highlighting-code-using-pygments-and-beautiful-soup/

def _highlight_python_code(self):
from pygments import highlight
from pygments.lexers import PythonLexer
from pygments.formatters import HtmlFormatter
from BeautifulSoup import BeautifulSoup

soup = BeautifulSoup(self.body)
python_code = soup.findAll("code")

if self.use_markdown:
import markdown

index = 0
for code in python_code:
code.replaceWith('mark %i' % index)
index = index+1

markdowned = markdown.markdown(str(soup))
soup = BeautifulSoup(markdowned)
markdowned_code = soup.findAll("p", "python_mark")

index = 0
for code in markdowned_code:

code.repalceWith(highlight(python_code[index].renderContents(),
PythonLexer(), HtmlFormatter()))
index = index+1
else:
for code in python_code:
code.replaceWith(highlight(code.string,
PythonLexer(), HtmlFormatter()))

return str(soup)

def save(self):
import markdown
self.body_html = self._highlight_python_code()
super(Entry,self).save()

-

If I create an entry with use_markdown True, and body:
this is a regular paragraph
`print "hello world"`

the body_html is:

this is a regular paragraph
   print hello world



If I create an entry with use_markdown False, and body:
this is a regular paragraph
print "hello world"

the body_html is:

this is a regular paragraph
print hello world


I want markdown to find my code blocks or code spans and then let them
be colored by pygments. If I turn use_markdown to False, pygments works.
If it is True, pygments doesn't work.

Maybe there is a problem with the replaceWith() markdowned_code and it
isn't getting changed in soup, which is then returned.



Thanks,
Evan

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database table doesn't exist

[Evan H. Carmi]

Hi,

I was implementing tags on my blog and ran into this problem:

Under the administration page I can create and view tags. I can also
view a list of entries and try and create an entry. When I try and
create an entry I can fill out the entry form and save it. The data is
saved and appears on my blog but I get the following error: (I also get
this error when trying to view the details for an entry.)


ProgrammingError at /admin/blog/entry/7/
(1146, "Table 'django_.blog_entry_tags' doesn't exist")
Request Method: GET
Request URL:http://binarymanipulations.com:8157/admin/blog/entry/7/
Exception Type: ProgrammingError
Exception Value:(1146, "Table 'django_.blog_entry_tags' doesn't exist")
Exception Location:
/usr/local/lib/python2.4/site-packages/MySQLdb/connections.py in
defaulterrorhandler, line 35
Python Executable:  /usr/local/bin/python
Python Version: 2.4.3

[snipped]


My blog/models.py is below (and here http://dpaste.com/hold/16673/) :

from django.db import models
import datetime

# Create your models here.

class Tag(models.Model):
slug = models.SlugField(
prepopulate_from=("name",),
help_text='Automatically prepopulated from name',
)
name = models.CharField(maxlength=30)
description = models.TextField(
help_text='Short summary of this tag'
)
def __str__(self):
return self.name

def get_absolute_url(self):
return "/blog/tag/%s/" % self.slug

class Admin:
list_display = ('slug', 'name',)
search_fields = ('name', 'description',)

class Entry(models.Model):
title = models.CharField(maxlength=255, core=True,
unique_for_date="pub_date")
pub_date = models.DateTimeField(core=True)
slug = models.SlugField(maxlength=30, prepopulate_from= ['title'])
body = models.TextField(core=True)
tags = models.ManyToManyField(Tag,
filter_interface=models.HORIZONTAL)

class Admin:
fields = (
(None, {'fields': ('slug', 'title', 'tags',
'pub_date', 'body',)}),
)

def __str__(self):
return self.title

def get_absolute_url(self):
return "/blog/%s/%s/" %
(self.pub_date.strftime("%Y/%m/%d").lower(), self.slug)


I have ran python manage.py syncdb. I really don't know what is going on
but I have a slight idea it might have something to do with the Entry
tags field. It seems like django wants to see a blog_entry_tags table in
the database but it isn't there. Maybe a problem with the ManyToManyField?

Thanks,
Evan

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Re: refreshing won't reload page

[Evan H. Carmi]

Florian Apolloner wrote:
> After editing your code, you will need to touch fcgi file
Can you be more explicit. I know the location of a lighttpd.sh init
file. But I am not sure if there is a fcgi file somewhere?

Evan

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refreshing won't reload page

[Evan H. Carmi]

Hello,

I am running Django with lighttpd. I will make a change in the code and
try and refresh the page through firefox. The page will reload but error
page shows me the old code. I can refresh it 20-30 times before it will
reload the new code. It seems as if something is being cached. I don't
think that it is my browser because refresh should not load from the
cache. Does lighttpd or django cache things automatically? Can I turn
this off during development?

Evan

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Re: Best practices to provide Django on a shared host

[Evan H. Carmi]

Fabien Schwob wrote:
> Hello,
> 
> I'm currently hosting  my Django websites on a dedicated server and it
> works fine. I restart Apache when I make modifications since I'm alone
> on the box.
> 
> But I've made evangelism for Django and I've convinced some friends to
> use it. So I would like to take a new server and to set up a "Django
> Shared Hosting". What is the best way to do that ?
> 
> - One Apache instance by user/website (I've seen that on
> http://www.gypsyhosting.com/) ? But how to do that does someone have
> some links to do that ?
> 
> - Using lighttpd and FGCI ?
> 
> - Using Apache and FCGI, so the user only need to *touch* the fcgi script.
> 
> My goal is to build my shared hosting and to create a document on how
> to do that. So, any help are welcome.
> 
> Thanks.
> 
Textdrive (Joyent) offers Django hosting.

There is an install script that will setup Django for you:
http://textusers.com/wiki/Installing_Django

Evan


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Generic Views: "Could not parse the remainder: % object.title %"

[Evan H. Carmi]

I am trying to use generic views for a hand built weblog app.

I am getting a template error of "Could not parse the remainder: %
object.title %"

My blog/urls.py is:
-
from django.conf.urls.defaults import *
from binarymanipulations.blog.models import Entry

info_dict = {
'queryset': Entry.objects.all(),
'date_field': 'pub_date',
}

urlpatterns = patterns('django.views.generic.date_based',

(r'^(?P\d{4})/(?P[a-z]{3})/(?P\w{1,2})/(?P[-\w]+)/$',
'object_detail', dict(info_dict, slug_field='slug')),
(r'^(?P\d{4})/(?P[a-z]{3})/(?P\w{1,2})/$',
'archive_day',  info_dict),
(r'^(?P\d{4})/(?P[a-z]{3})/$', 'archive_month',
   info_dict),
(r'^(?P\d{4})/$', 'archive_year', info_dict),
(r'^$', 'archive_index',info_dict),
)

-

My blog/models.py is:
-
from django.db import models
import datetime

# Create your models here.
class Entry(models.Model):
title = models.CharField(maxlength=255, core=True)
pub_date = models.DateTimeField(core=True)
slug = models.SlugField(maxlength=30, prepopulate_from= ['title'])
body = models.TextField(core=True)
class Admin:
fields = (
(None, {'fields': ('slug', 'title', 'pub_date', 'body',)}),
)

def __str__(self):
return self.title

-

My template/blog/entry_archive.html is:
-
{% extends blog_base.html %}

{% block content %}

{% for object in latest %}
 {{% object.title %}} 
 {{% object.body %}} 
{% endfor %}

{% endblock %}
-

I think my problem is that I am calling latest instead of something else
. I am not sure what the name for it should be. I tried to define a
template_object_name but that raised an error that it was unexpected.

Any help would be appreciated.

Thanks, Evan

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Re: Creating a current path Context Processor

[Evan H. Carmi]

James Bennett wrote:
> On 6/3/07, Evan H. Carmi <[EMAIL PROTECTED]> wrote:
>> I don't know how to pass the context processor with HttpResponse so my
>> template can do the ifequal. If someone can send me in the right
>> direction it would be glorious.
> 
> Have a look at the documentation, which covers the fact that you need
> to use a slightly different Context class to have context processors
> automatically applied:
> 
> http://www.djangoproject.com/documentation/templates_python/#subclassing-context-requestcontext
> 
> You'll want to import RequestContext, and do something like
> 
> c = RequestContext(request, { 'posts': entreis })
> 
> Or import the render_to_response shortcut as well and do it like so:
> 
> return render_to_response('blog/blog_list.html', { 'posts': entries },
> context_instance=RequestContext(request))
> 
> Also, note that Django includes a context processor which adds the
> HttpRequest object to any RequestContext it's used in, so adding
> 'django.core.context_processors.request' to your
> TEMPLATE_CONTEXT_PROCESSORS setting will get that for you
> automatically; then, in a template, you could use {{ request.path }}
> to get the path.
> 
Thanks for your help. I eventually got it to work. The request.path only
gives the ending of the url e.g. "/blog/" not the full url though?

Evan

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Creating a current path Context Processor

[Evan H. Carmi]

Hi,

I am trying to follow the DRY principle. For the navigation of my site I
want to have a single template. My problem is that I need a way to
change the class of the nav links depending on what page is currently
being visited.

I want to try and do something of this sort: In my template do a ifequal
current path to the path the nav links to than this will have the class
of nav_here. All the other nav links will have a class of nav_regular.
(The specific names of these classes doesn't matter.)

On the django IRC channel someone suggested that I use a Context
Processor to do this. I am not completely sure how Context Processors
work but I tried anyways.

In my settings.py I have:
#Context Processors
TEMPLATE_CONTEXT_PROCESSORS = (
'binarymanipulations.context_processor',
)

In the directory binarymanipulations I have a context_processor.py file
with:
#Context Processors should live here

def CurrentPath(request):
return {'current_path': request.path}

My views.py is:
# Create your views here.
from django.shortcuts import HttpResponse
from binarymanipulations.blog.models import Entry
from django.template import Context, loader, Template
from binarymanipulations.context_processor import CurrentPath

def index(request):
entries = Entry.objects.all().order_by('-pub_date')

t = loader.get_template('blog/blog_list.html')
c = Context({
  'posts' : entries
})

return HttpResponse(t.render(c))


I don't know how to pass the context processor with HttpResponse so my
template can do the ifequal. If someone can send me in the right
direction it would be glorious.

Evan

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Creating a Blog: combining seperate parts

[Evan H. Carmi]

Hey,

I am attempting to create a blog from scratch (it sounds like a great
way to learn something but it is a lot more work if it is the first
project you've done.)

I have a models.py:
-
class Entry(models.Model):
title = models.CharField(maxlength=255, core=True)
pub_date = models.DateTimeField(core=True)
slug = models.SlugField(maxlength=30, prepopulate_from= ['title'])
body = models.TextField(core=True)
class Admin:
fields = (
(None, {'fields': ('slug', 'title', 'pub_date', 'body',)}),
)

def __str__(self):
return self.title
-


A views.py:
-
def index(request):
latest_values_list = Entry.objects.values()

return render_to_response('blog/blog_list.html',
{'latest_values_list': latest_values_list})
-


A template blog_list.html:
-

Blog Homepage



{{title}}

Published on {{pub_date}}

{{body}}


-

My views.py is very wrong. So for now ignore it.

I want to have all the data from Entry visible through the template to a
web browser. I don't know what is a fast and efficient way to have my
views.py deal with the database and then have my template show it. If
anyone has any ideas it would be great.

Thanks, Evan

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Re: Tutorial: Can't see my polls

[Evan H. Carmi]

risomt wrote:
> http://binarymanipulations.com:8157/polls/1/vote/ displays the Poll's
> title and all of the poll's choices correctly - start from there
I am not sure of how to start. I have been looking around with my views
and models and templates but as the novice I am, I haven't found
anything yet.
Should I post some other information? Or can you define how to "start
from there" more clearly?

> Sorry for the weak answer, but its pretty late.  I did notice an error
> with your form in poll_detail (http://binarymanipulations.com:8157/
> polls/1/) -  should be
> 
I looked at that. My poll_detail.html is:
--
{{ poll.question }}

{% if error_message %}{{ error_message }}{% endif %}


{% for choice in poll.choice_set.all %}

{{ choice.choice
}}
{% endfor %}


-

So to me it looks as if my form action  is how it should be?

Thanks, Evan

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Tutorial: Can't see my polls

[Evan H. Carmi]

Hello,

I am running django 0.95. I am going through the tutorial. My problem is
 this:

I have 4 polls. If I run python manage.py shell and Poll.objects.all()
it shows them. Unfortunately when I go mysite/polls
(http://binarymanipulations.com:8157/polls/) it says "No polls are
available." Also if I go to mysite/polls/1
(http://binarymanipulations.com:8157/polls/1/) it shows a vote box but
no options.

My views.py is http://dpaste.com/8413/
and template for poll_list.html http://dpaste.com/8414/

If anyone can tell me where my grievous error is, I would be very happy.
I have asked a little on #django but to no avail.

Thanks,
Evan

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