Default length for varchar of the field is insufficient

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Follow normal steps and try to add a photo

Warning at /admin/clothes/image/add/
Data truncated for column 'photo' at row 1
Request Method: POST
Request URL:    http://shady.akwire.lan:9000/admin/clothes/image/add/
Django Version: 1.4.2
Exception Type: Warning
Exception Value:    
Data truncated for column 'photo' at row 1

The URL it's making (which I see in error log) is 
https://picasaweb.google.com/data/entry/api/user/107481063111315673154/albumid/5
829459793583883265/photoid/5829459798970893554 and the database was created 
with photo field as varchar(100), so 100 is too short.

Request Method: POST
Request URL: http://shady.akwire.lan:9000/admin/clothes/image/add/

Django Version: 1.4.2
Python Version: 2.7.1
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'polls',
 'clothes',
 'django.contrib.admin',
 'south',
 'autocomplete_light',
 'picasa')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware')

Traceback:
File "/home/dave/google_appengine/lib/django_1_4/django/core/handlers/base.py" 
in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File 
"/home/dave/google_appengine/lib/django_1_4/django/contrib/admin/options.py" in 
wrapper
  366.                 return self.admin_site.admin_view(view)(*args, **kwargs)
File "/home/dave/google_appengine/lib/django_1_4/django/utils/decorators.py" in 
_wrapped_view
  91.                     response = view_func(request, *args, **kwargs)
File 
"/home/dave/google_appengine/lib/django_1_4/django/views/decorators/cache.py" 
in _wrapped_view_func
  89.         response = view_func(request, *args, **kwargs)
File "/home/dave/google_appengine/lib/django_1_4/django/contrib/admin/sites.py" 
in inner
  196.             return view(request, *args, **kwargs)
File "/home/dave/google_appengine/lib/django_1_4/django/utils/decorators.py" in 
_wrapper
  25.             return bound_func(*args, **kwargs)
File "/home/dave/google_appengine/lib/django_1_4/django/utils/decorators.py" in 
_wrapped_view
  91.                     response = view_func(request, *args, **kwargs)
File "/home/dave/google_appengine/lib/django_1_4/django/utils/decorators.py" in 
bound_func
  21.                 return func(self, *args2, **kwargs2)
File "/home/dave/google_appengine/lib/django_1_4/django/db/transaction.py" in 
inner
  209.                 return func(*args, **kwargs)
File 
"/home/dave/google_appengine/lib/django_1_4/django/contrib/admin/options.py" in 
add_view
  955.                 self.save_model(request, new_object, form, False)
File 
"/home/dave/google_appengine/lib/django_1_4/django/contrib/admin/options.py" in 
save_model
  709.         obj.save()
File "/home/dave/google_appengine/lib/django_1_4/django/db/models/base.py" in 
save
  463.         self.save_base(using=using, force_insert=force_insert, force_update=force_update)
File "/home/dave/google_appengine/lib/django_1_4/django/db/models/base.py" in 
save_base
  551.                 result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)
File "/home/dave/google_appengine/lib/django_1_4/django/db/models/manager.py" 
in _insert
  203.         return insert_query(self.model, objs, fields, **kwargs)
File "/home/dave/google_appengine/lib/django_1_4/django/db/models/query.py" in 
insert_query
  1593.     return query.get_compiler(using=using).execute_sql(return_id)
File 
"/home/dave/google_appengine/lib/django_1_4/django/db/models/sql/compiler.py" 
in execute_sql
  910.             cursor.execute(sql, params)
File "/home/dave/google_appengine/lib/django_1_4/django/db/backends/util.py" in 
execute
  40.             return self.cursor.execute(sql, params)
File 
"/home/dave/google_appengine/lib/django_1_4/django/db/backends/mysql/base.py" 
in execute
  114.             return self.cursor.execute(query, args)

Exception Type: Warning at /admin/clothes/image/add/
Exception Value: Data truncated for column 'photo' at row 1

Original issue reported on code.google.com by davemccloskey on 4 Jan 2013 at 5:39

[GoogleCodeExporter]

Based on this blog post 
http://reinout.vanrees.org/weblog/2012/04/13/django-filefield-limitation.html, 
you can fix this issue by passing max_length argument to PicasaField.

Example:

class Image(models.Model):
  photo = PicasaField(upload_to='/foo', max_length=300)

Original comment by davemccloskey on 4 Jan 2013 at 5:45