python - Cannot save ManyToMany fields from Django Admin interface -


my sqllite3 database , django setup working correctly except single situation involving admin interface:

class box(models.model):     name = models.charfield(max_length=200, primary_key=true)     balls = models.manytomanyfield( 'ball' )  class ball(models.model):     name = models.charfield(max_length=200, primary_key=true)

i have manytomany field in box model contain multiple ball models. can create balls , can create box , link balls. cannot edit/save box's set of balls after it's been created without getting server error:

databaseerror : unable open database file

i using development server (python manage.py runserver). apart admin glitch, database io works fine across site.

things have tried have not helped: 1. deleting database , running syncdb again start fresh. 2. set db path in settings.py full path. 3. running shell start dev server 'as administrator' 4. setting parent, folder , db file permissions rw

i don't know else try. i'm open crazy suggestions, hoping might know cause this...

update:

i got working!

i suspected issue sqllite3 database. perhaps it's lack of transactional updates... can't sure. swapped database out mysql , issue gone. can create 'boxes' , add 'balls' them now.


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