Question

i have asked a question about manytomanyfield here which i solved but now a new problem is raised as,

DatabaseError at /admin/myapp/photo/8/delete/

relation "woek_gallery_photos" does not exist
LINE 1: DELETE FROM "woek_gallery_photos" WHERE "photo_id" IN ...

i know why this problem raises but i dont know how to. i have one Photo model which has relation with both Group model and Gallery model. when i add an image from Gallery it works good but as to deleting it, raises problem with Group about not having any relation…

class Gallery(models.Model):
    ....
    photos = models.ManyToManyField('Photo', related_name='galleries', 
             verbose_name=_('Gallery'),
                                    null=True, blank=True)

class Group(models.Model):
    ...
    photos = models.ManyToManyField('Photo', related_name='galleries', 
             verbose_name=_('Group'),
                                    null=True, blank=True, 
                                    through='through=GroupPhotos')

class Photo(models.Model):
    image = models.ImageField(verbose_name = "Browse", 
                              upload_to=myPath)

I appreciate your all helping.

Answer 1

That error means the join table for the relationship between Photo and Gallery is missing or was never created in the first place. If you haven’t done so already run:

python manage.py syncdb

If that still doesn’t work, create the table manually. You can run:

python manage.py sqlall yourapp

to get the proper SQL to use. Look for the lines where it creates woek_gallery_photos and copy that bit. Then run:

python manage.py dbshell

And paste it at the prompt. Hit enter, and you should be good to go.