- Author:
- davidwtbuxton
- Posted:
- May 17, 2008
- Language:
- Python
- Version:
- .96
- Score:
- 2 (after 2 ratings)
This takes the "easier to ask forgiveness than permission" approach to making sure your model's slug is unique.
If the model's slug is empty, make a slug from the model's 'name' field.
We assume that it is a conflicting slug that is throwing the IntegrityError, in which case if the slug does not end with '-' followed by a number then append '-2'. If the slug does end with '-' followed by a number then capture that final number, increment it by one, save the new slug value and try savin g again.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | from django.db import models, IntegrityError
class MyModel(models.Model):
def save(self):
"""Auto-populate an empty slug field from the MyModel name and
if it conflicts with an existing slug then append a number and try
saving again.
"""
import re
from django.template.defaultfilters import slugify
if not self.slug:
self.slug = slugify(self.name) # Where self.name is the field used for 'pre-populate from'
while True:
try:
super(MyModel, self).save()
# Assuming the IntegrityError is due to a slug fight
except IntegrityError:
match_obj = re.match(r'^(.*)-(\d+)$', self.slug)
if match_obj:
next_int = int(match_obj.group(2)) + 1
self.slug = match_obj.group(1) + '-' + str(next_int)
else:
self.slug += '-2'
else:
break
|
More like this
- Template tag - list punctuation for a list of items by shapiromatron 10 months, 4 weeks ago
- JSONRequestMiddleware adds a .json() method to your HttpRequests by cdcarter 11 months ago
- Serializer factory with Django Rest Framework by julio 1 year, 5 months ago
- Image compression before saving the new model / work with JPG, PNG by Schleidens 1 year, 6 months ago
- Help text hyperlinks by sa2812 1 year, 7 months ago
Comments
Please login first before commenting.