custom save method on model - django

Question

I am overriding the save method on one of my models:

def save(self, *args, **kwargs): self.set_coords() super(Post, self).save(*args, **kwargs) def __unicode__(self): return self.address # set coordinates def set_coords(self): toFind = self.address + ', ' + self.city + ', ' + \ self.province + ', ' + self.postal (place, location) = g.geocode(toFind) self.lat = location[0] self.lng = location[1]

However, I only want to run set_coords() once, when the post is being created. This function should not run when the model is being updated.

How can I accomplish this? Is there any way of detecting if the model is being created or updated?

artu-hnrq · Accepted Answer · 2023-01-23 02:40:34Z

33

def save(self, *args, **kwargs): if not self.pk: self.set_coords() super(Post, self).save(*args, **kwargs)

edited Jan 23, 2023 at 2:40

artu-hnrq

1,5872 gold badges15 silver badges40 bronze badges

answered Jul 12, 2012 at 17:05

jagm

5764 silver badges6 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Vaibhav Jain Over a year ago

Can you please tell me that. Return should be used or not on line super(Post, self).save(*args, **kwargs). It works without return.

Abdeslem Daaif · Accepted Answer · 2012-07-12 17:45:02Z

I think the correct way to do it is using post_save signal:

def set_coords(sender, **kw): model_instance = kw["instance"] if kw["created"]: toFind = model_instance.address + ', ' + model_instance.city + ', ' + \ model_instance.province + ', ' + model_instance.postal (place, location) = g.geocode(toFind) model_instance.lat = location[0] model_instance.lng = location[1] model_instance.save() post_save.connect(set_coords, sender=MyModel)

I would say that signals are a better call to change behaviour of models we don't have access to. Despite of being useful either way. ;)

Collectives™ on Stack Overflow

custom save method on model - django

2 Answers 2

1 Comment

1 Comment

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Linked

Related