Nm. Googled alot and figured it out.
def contribute_to_class(self, cls, name): super(MyFieldName, self).contribute_to_class(cls, name) signals.post_init.connect(self.post_init, cls, True) and self.post_init: def post_init(self, **kwargs): logger.debug('postinig') instance = kwargs['instance'] value = self.value_from_object(instance) if value: setattr(instance, self.attname, loads(value)) else: setattr(instance, self.attname, None) Where loads does the actual converting. Alan On Sep 8, 11:37 am, zayatzz <alan.kesselm...@gmail.com> wrote: > I have a problem when i try to create new model field type - postgres > time[]. > > Thanks to psycopg2 the information from database is ready out and > converted into python list. > > the list looks like that thought: > > [[datetime.time(0, 0), datetime.time(23, 59, 59)], [datetime.time(0, > 0), datetime.time(23, 59, 59)], [datetime.time(0, 0), > datetime.time(23, 59, 59)], [datetime.time(0, 0), datetime.time(23, > 59, 59)], [datetime.time(0, 0), datetime.time(23, 59, 59)], > [datetime.time(0, 0), datetime.time(23, 59, 59)], [datetime.time(0, > 0), datetime.time(23, 59, 59)]] > Now i could create widget, that uses JavaScript to convert it into > time. But it seems to me, that it could be done faster on python side > and since all kinds of time picker widgets deal with time in %H:%M:%S > format it looks wise to both get and give data in same format. > Converting data back to string, which is 'datetime.time(0, 0)' does > not look very nice either. > > so, all that brings me to asking - what kind of method of > django.db.models.fields.Field class is called after database read? > fromhttps://docs.djangoproject.com/en/dev/howto/custom-model-fields/ > it looks like it should be Field.to_python, but when i add method > like: > > def to_python(self, value): > return 'xxx' > to my field, then i still see previously added list of datetimes in my > input not 'xxx' > > Can someone help me sort this out please :) - the question is > basically - how can i format the data read from database into desired > format for displaying in formfield? > > Alan -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.