Re: Missing template variable when using django admin list_display

On Mon, Aug 30, 2010 at 4:13 PM, christian.oudard <christian.oudard@gmail.com> wrote:

On Django 1.2, I'm getting a missing template variable when using a
custom formatter in the django admin.

Here is my admin class:

class CustomerAdmin(admin.ModelAdmin):
   fields = [
       'name',
   ]
   list_display = [
       'name',
       'customer_tenants',
   ]
   def customer_tenants(self, customer):
       return u', '.join(t.subdomain for t in
customer.tenant_set.all())
   customer_tenants.short_description = 'Tenants'

The error seems to be the same one as in this ticket:
http://code.djangoproject.com/ticket/2583

Looking at the template from the admin app, the header.class_attrib
seems to be missing. This is generated internally by django.

I can fix the error by changing the template admin/
change_list_results.html by putting an if statement around the
{{ header.class_attrib }} variable:

{% for header in result_headers %}<th{% if header.class_attrib %}
{{ header.class_attrib }}{% endif %}>

Is this an error due to improper configuration or due to a bug in
django?

Do you have TEMPLATE_STRING_IF_INVALID set to something? That is documented to be only for temporary debug purposes: http://docs.djangoproject.com/en/dev/ref/templates/api/#invalid-template-variables. Attempting to use the admin with TEMPLATE_STRING_IF_INVALID set to something other than the empty string is not a good idea -- admin is one of the specific apps noted as relying on the default value of an empty string for invalid variable references in templates.

Karen
--
http://tracey.org/kmt/

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