The error is generated because you have two fields in the Swap model
that refer to the User model, and two that refer to the Shifts model.
As the error states you need to specify the related_name value for
those ForeignKeys. Take a look at the documentation for related_name
here:
http://www.djangoproject.com/documentation/model-api/#many-to-one-relationships
class Swaps(models.Model):
origin_shift = models.ForeignKey(Shifts,
related_name='origin_shift')
origin_user = models.ForeignKey(User,
related_name='origin_user')
destination_shift = models.ForeignKey(Shifts,
related_name='destination_shift')
state = models.CharField(maxlength=25)
swap_user = models.ForeignKey(User, related_name='swap_user')
HTH
Keith
On Aug 27, 11:42 am, "Daniel A." <[EMAIL PROTECTED]> wrote:
> Hi! I'm a switcher from Rails and I'm learning Django. I'm stuck with
> something I thing should be easy but for some reason I can't find the
> error.
>
> I'm trying to define a model to manage shifts for volunteers. I have
> three diferent models, Shifts, Users and Swaps. A User have many
> Shifts and a Shift have many Swaps, while a Shift only have one User,
> and a Swap only have one Shift. A Shift have two users. Well, then I
> wrote something like this:
>
> from django.db import models
> from django.contrib.auth.models import User
>
> # Create your models here.
> class Shifts(models.Model):
> date = models.DateField()
> user_1 = models.ForeignKey(User)
> user_2 = models.ForeignKey(User)
> turno = models.IntegerField()
>
> class Swaps(models.Model):
> origin_shift = models.ForeignKey(Shifts)
> origin_user = models.ForeignKey(User)
> destination_shift = models.ForeignKey(Shifts)
> state = models.CharField(maxlength=25)
> swap_user = models.ForeignKey(User)
>
> Does anybody knows what I'm doing wrong? I get messages of validation
> like this:
>
> turno.shifts: Accessor for field 'user_1' clashes with related field
> 'User.shifts_set'. Add a related_name argument to the definition for
> 'user_1'.
> turno.shifts: Accessor for field 'user_2' clashes with related field
> 'User.shifts_set'. Add a related_name argument to the definition for
> 'user_2'.
> turno.swaps: Accessor for field 'origin_shift' clashes with related
> field 'Shifts.swaps_set'. Add a related_name argument to the
> definition for 'origin_shift'.
> turno.swaps: Accessor for field 'origin_user' clashes with related
> field 'User.swaps_set'. Add a related_name argument to the definition
> for 'origin_user'.
> turno.swaps: Accessor for field 'destination_shift' clashes with
> related field 'Shifts.swaps_set'. Add a related_name argument to the
> definition for 'destination_shift'.
> turno.swaps: Accessor for field 'swap_user' clashes with related field
> 'User.swaps_set'. Add a related_name argument to the definition for
> 'swap_user'.
>
> Thanks in advance.
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