Question

I’m having an issue where the Inline Admin functionality is behaving differently in different environments.

In Dev, when editing a technology I get a link at the bottom to add more Roll Modifiers as needed that works flawlessly.

In Test, I get a single roll modifier with no link to add more and it silently fails to save any changes I make to the roll modifier.

The same code is deployed to both environments. Any ideas what might be going on here?

Dev Server Configuration (actually a Desktop)

• Gentoo Linux
• Django 1.3
• SQLLite3 Database (locally stored)
• Django built-in development server
• Python 2.6.6

Test Server Configuration

• SuSE Linux 11.4
• Django 1.3 (also tried with Django 1.2.5)
• PostgreSQL 9.0.3
• Apache2 2.2.17
• Python 2.7

Appendix A – Model Code

class Technology(models.Model):
  categories = (
     ('weap' , 'Weaponry'),
     ('equip', 'Equipment'),
     ('cons' , 'Construction'),
     ('ammo' , 'Ammunition'),
   )

  name = models.CharField(max_length=40)
  category = models.CharField(max_length=8, choices=categories)
  urlname = models.CharField(max_length=20)
  description = models.TextField()
  base_difficulty = models.IntegerField()
  tier = models.IntegerField()
  show = models.BooleanField()

  def __unicode__(self):
    return self.name

class TechnologyRollModifier(models.Model):
  technology = models.ForeignKey(Technology)
  modifier   = models.IntegerField(default=2)
  condition  = models.CharField(max_length=120)

Appendix B – Admin Code

from django.contrib import admin
from solaris.warbook import models

class TechnologyRollModifierInline(admin.StackedInline):
  model = models.TechnologyRollModifier
  extra = 0

class TechnologyAdmin(admin.ModelAdmin):
  fields = ['name', 'urlname', 'description', 'tier', 'category', 'base_difficulty', 'show']
  inlines = [TechnologyRollModifierInline,]

admin.site.register(models.Technology, TechnologyAdmin)

Answer 1

Figured it out. Some time ago I’d copied the Django admin files to /var/www/media/admin and aliases /media/ to /var/www/media/

Which means it was serving up the old media files – giving me working CSS / images but silently failing to find the JavaScript – which the StackedInline admin interface relies upon to do its work.

The single TechnologyRollModifier I saw was meant to be the hidden template and did not actually record any data meant to be entered into it.

Another mystery solved….