well .. odd .. replying my own post ..
kwargs['action']
A string indicating the type of update that is done on the relation. This
can be one of the following:
"pre_add"Sent *before* one or more objects are added to the relation.
"post_add"Sent *after* one or more objects are added to the relation.
"pre_remove"Sent *before* one or more objects are removed from the relation.
"post_remove"Sent *after* one or more objects are removed from the relation.
"pre_clear"Sent *before* the relation is cleared."post_clear"Sent *after*the
relation is cleared.
m2m_changed calls the handle_something function with different
kwargs['action'] value which can help you differentiate between them.
On Friday, June 8, 2012 7:24:34 PM UTC+5:30, vijay shanker wrote:
>
> hi
> i have this model Client_Order
> i want to do some manipulation each time a new pakg is added to this
> field.
> i used m2m_changed signal, but it cant distinguish between existing
> instances attached and the newly added ones.
> both post_add and pre_add show the same number of instances .. i.e if
> a.b were attached and i added c instance to it .. both post_add and
> pre_add give the same pk_set in kwargs
>
> ACTV_STATUS = (
> ('Active','Active'),
> ('Inactive','Inactive'),
> )
>
> class Client_Order(models.Model):
> order_name = models.CharField(max_length=300)
> order_desc = models.TextField(verbose_name="Order
> Description")
> order_client = models.ForeignKey(Client_sda)
> order_active_status = models.CharField(choices = ACTV_STATUS,
> max_length=300)
> order_pakages = models.ManyToManyField(Pakage,
> help_text="Please attach a maximum of 5 packages only. ")
> discount = models.IntegerField(default=0)
> total_amount = models.IntegerField()
> order_booking_date = models.DateField()
> order_expiry_date = models.DateField()
>
> @receiver(m2m_changed)
> def handle_something(sender, instance, signal,*args, **kwargs):
> print kwargs
> print 'pk_set->',kwargs['pk_set']
>
> how do i distinguish between newly added instances from previously
> added ones ?
>
--
You received this message because you are subscribed to the Google Groups
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to django-users+unsubscr...@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at http://groups.google.com/group/django-users?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
