| 3 | | Requires a minor change to the admin view. |
| 4 | | |
| 5 | | {{{ |
| 6 | | |
| 7 | | --- django/contrib/admin/views/main.py (revision 3185) |
| 8 | | +++ django/contrib/admin/views/main.py (working copy) |
| 9 | | @@ -319,7 +319,7 @@ |
| 10 | | |
| 11 | | if request.POST: |
| 12 | | new_data = request.POST.copy() |
| 13 | | - |
| 14 | | + new_data.update({'id':object_id}) |
| 15 | | if opts.has_field_type(models.FileField): |
| 16 | | new_data.update(request.FILES) |
| 17 | | |
| 18 | | |
| 19 | | }}} |
| 20 | | |
| 21 | | someapp/models.py |
| 22 | | |
| 23 | | {{{ |
| 24 | | |
| 25 | | class isUniqueSlug: |
| 26 | | |
| 27 | | def __init__(self, slug, app, model): |
| 28 | | self.slug, self.app, self.model = slug, app, model |
| 29 | | |
| 30 | | def __call__(self, field_data, all_data): |
| 31 | | |
| 32 | | from django.core.validators import ValidationError |
| 33 | | from django.utils.translation import gettext, gettext_lazy |
| 34 | | from django.db.models.loading import get_model |
| 35 | | |
| 36 | | model = get_model(self.app,self.model) |
| 37 | | |
| 38 | | if all_data.get('id', None): |
| 39 | | q=model.objects.exclude(id=all_data.get('id')) |
| 40 | | else: |
| 41 | | q=model.objects.all() |
| 42 | | |
| 43 | | try: |
| 44 | | d = {self.slug+'__exact': field_data} |
| 45 | | p = q.get(**d) |
| 46 | | except: |
| 47 | | p=None |
| 48 | | |
| 49 | | if p: |
| 50 | | raise ValidationError, gettext_lazy("Is not a unique slug.") |
| 51 | | |
| 52 | | |
| 53 | | class Somemodel(models.Model): |
| 54 | | |
| 55 | | any_slug = models.SlugField(validator_list=[isUniqueSlug('any_slug','someapp','Somemodel')]) |
| 56 | | |
| 57 | | }}} |
| 58 | | |
| 59 | | |
| | 3 | To make fields unique use Field.unique: https://docs.djangoproject.com/en/3.0/ref/models/fields/#unique |