Hi, I get OperationalError: (1364, "Field, 'user_id' doesn't have a default value")
As I understand, the many-to-many relationship shall be taken care of by a join table.No such table shows up when I run mysql show tables;. I have of course run a syncdb command. All other tables are present. Thanks DR Robert On 4 apr, 14:10, Daniel Roseman <[email protected]> wrote: > On Apr 4, 11:56 am, Robert <[email protected]> wrote: > > > > > > > I wonder whether you have to save a record to the database BEFORE you > > can update a ManyToMany field? > > > I came across a post by Karen Tracey that seems to suggest this. > > > The problem is that I am unable to do so because the ManyToManyField > > in my model has no default value and this triggers an error when I try > > to save without adding a value to it. And when I try to add a value > > django says that the "instance needs a primary key value before a many- > > to-many relationship can be used." Thus, it's kind of a trap, isn't > > it? > > > I am working on an app with similar models to the document "Making > > queries" athttp://docs.djangoproject.com/en/1.0/topics/db/queries > > > only that I change the authors-field with a users field pointing to > > the auth.model User. > > > class Entry(models.Model): > > [..] > > users = models.ManyToManyField(User) > > No, there isn't usually a trap here. What error do you get when you > try to save without defining a ManyToMany? > -- > DR.– Skjul sitert tekst – > > – Vis sitert tekst – -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
