Re: Save the user from one model to the another model

This seems like a job for signals. Register a post_save signal for the Message class, something like this:

from django.db.models.signals import post_save
from django.dispatch import receiver
from myapp.models import Message, Thread

@receiver(post_save, sender=Message)  def add_to_thread(sender, instance, created, **kwargs):      if created:
        instance.thread.user.add(instance.sender)

On Tuesday, December 3, 2013 11:56:23 AM UTC, Aamu Padi wrote:

Ok! Plural names. Got it. But I was looking for something more of a overriding the save method for the Thread class, so that I don't have to do that in the view.

On Tue, Dec 3, 2013 at 1:39 PM, <jirka.v...@gmail.com> wrote:

You're probably looking for something along the lines of:

thread = Thread.objects.get(id=<someid>)
msg = Message.objects.get(id=<someid>)

thread.user.add(msg.sender)

Look at add() and remove() methods in documentation (search for related managers).

FYI - it's a good practice to name fields that use ManyToMany field in plural, i.e. Thread.users would be better than Thread.user

HTH

Jirka

---

From: Aamu Padi <aamu...@gmail.com>

Sender: django...@googlegroups.com

Date: Tue, 3 Dec 2013 04:19:55 +0530

To: <django...@googlegroups.com>

ReplyTo: django...@googlegroups.com

Subject: Save the user from one model to the another model

What I want to do is, whenever I create a new message, I want the sender of the Message to be added to the user of the Thread. How do I do that?

 

class Thread(models.Model):
    user = models.ManyToManyField(User)
    is_hidden = models.ManyToManyField(User, related_name='hidden_thread', blank=True)

    def __unicode__(self):
        return unicode(self.id)

class Message(models.Model):
    thread = models.ForeignKey(Thread)
    sent_date = models.DateTimeField(default=datetime.now)
    sender = models.ForeignKey(User)
    body = models.TextField()
    is_hidden = models.ManyToManyField(User, related_name='hidden_message', blank=True)

    def __unicode__(self):
        return "%s - %s" % (unicode(self.thread.id), self.body)

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