added check for admin plugin user group membership

devel/TODO

@@ -23,7 +23,7 @@ Todo bis release:
  - einkaufsseite
 	- alle items, sortierung nach preis/alphabet
  - suchfeld fixen (konrad?)
- - image aspect ration checking und/oder irgendwo hinschreiben (seba)
+[x] image aspect ration checking und/oder irgendwo hinschreiben (seba)
  - transaktionsseite schöner machen
  - pluginseite (einstellungen) schöner machen
  - history: items durch bilder ersetzen, pfand drunterschreiben wenn pfand...

k4ever/main/admin.py

@@ -1,7 +1,24 @@
 from models import UserProfile, Plugin, PluginPermission
 from django.contrib import admin
+from django import forms
+from django.contrib.auth.models import User, Group
+
+class PluginAdminForm(forms.ModelForm):
+	""" Form made to require that the user of a plugin is in the plugin group """
+	class Meta:
+		model = Plugin
+	
+	def clean_user(self):
+		user = self.cleaned_data['user']
+		group = Group.objects.get(name="Plugin")
+		if not group in user.groups.all():
+			raise forms.ValidationError("The user for a plugin has to be a member of the 'Plugin' group")
+		return self.cleaned_data['user']
+
+class PluginAdmin(admin.ModelAdmin):
+	form = PluginAdminForm
 
 admin.site.register(UserProfile)
-admin.site.register(Plugin)
+admin.site.register(Plugin, PluginAdmin)
 admin.site.register(PluginPermission)