loaddata doesn't handle ImportError exception

[nvalcarcel@…]

Steps to reproduce:

1. create a clean virtualenv

virtualenv virtual

2. install django 1.4

pip install django==1.4

3. create a project and app
4. add wadofstuff (don't install it on the virtenv)

   SERIALIZATION_MODULES = {
       'json': 'wadofstuff.django.serializers.json'
   }
   

5. run syncdb

Django will fail on line 123 of loaddata.py:

formats = serializers.get_public_serializer_formats()

with

*** ImportError: No module named wadofstuff.django.serializers.json

but will trough this error:

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/base.py", line 196, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/base.py", line 232, in execute
    output = self.handle(*args, **options)
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/base.py", line 371, in handle
    return self.handle_noargs(**options)
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 164, in handle_noargs
    call_command('loaddata', 'initial_data', verbosity=verbosity, database=db)
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 150, in call_command
    return klass.execute(*args, **defaults)
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/base.py", line 232, in execute
    output = self.handle(*args, **options)
  File "/home/nxvl/dev/repuesport/virtual/local/lib/python2.7/site-packages/django/core/management/commands/loaddata.py", line 239, in handle
    (full_path, ''.join(traceback.format_exception(sys.exc_type,
UnboundLocalError: local variable 'full_path' referenced before assignment

Issue is on the exception handler line 230.

[Claude Paroz]

More precise exception catching

[Claude Paroz]

#17853 has been marked as a dup of this one.

[Claude Paroz]

Updated to current trunk

[Claude Paroz <claude@…>]

In [4353a6163c00d4193307dae533e3e6ae9b44d18f]:

Fixed #18196 -- Improved loaddata error messages.