[Django] #29424: Datetime objects parsed as strings when signals used - Django 1.9.5

[Django]

#29424: Datetime objects parsed as strings when signals used - Django 1.9.5
-------------------------------------+-------------------------------------
               Reporter:  Adrian     |          Owner:  nobody
  Castellanos                        |
                   Type:  Bug        |         Status:  new
              Component:             |        Version:
  Uncategorized                      |
               Severity:  Normal     |       Keywords:  signals model
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
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 I found a strange behavior when accesing objects models using signals. The
 model is declared as:

 {{{
 class Campaign(models.Model):
     start_stay_date = models.DateTimeField(null=True, blank=True)
     end_stay_date = models.DateTimeField(null=True, blank=True)
 }}}

 When I use signals to connect the changes of the model with a function, a
 found that the instance that is passed as argument has strings instead of
 datetime in the dates:

 The code of the conection between the model and the function is:

 {{{
 def export_campaign_to_mongo(sender, instance, *args, **kwargs):
     check_dates()
 post_save.connect(export_campaign_to_mongo, Campaign)
 }}}

 This is the output of the console checking the types of the objects:

 {{{
 >>>type(instance)
 <class 'campaigns.models.Campaign'>
 >>>instance.start_date
 '2018-04-11T00:00:00'
 >>>from campaigns.models import Campaign
 >>>Campaign.objects.first().start_date
 datetime.datetime(2016, 10, 10, 0, 0)
 }}}

 I am using Django v1.9.5.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/29424>
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