Django, Python, trying to change field values / attributes in object retrieved from DB objects.all call, not working
I'm not sure if this is the problem or not, but I think you might be missing a save() method.
from models import Person
p = Person.objects.get(pk=100)
p.name = 'Rico'
p.save() # <== This writes it to the db. Is this what you're missing?
Above is the simple case. Adapted for what you wrote above, it'd be like:
dbobject.dbobject[0].fieldname = 'some new value'
dbobject.dbobject[0].save()
or, I'd write it more like:
rec = dbobject.dbobject[0]
rec.fieldname = 'some new value'
rec.save()
Also note that depending on whether and how you are using transactions, you may or may not see a change to the database until you commit.
Rick
Web programmer with an interest in web task automation, building websites, etc, I prefer to do everything in Python now as I have moved to it from using a variety of other languages in the past. I also like to do front-end AJAX / javascript work but am moving to do this through Python as well, with the Pyjamas framework.
Updated on July 09, 2022Comments
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Rick almost 2 years
I'm trying to change a specific field from a field in an object that I retrieved from a django db call.
class Dbobject () def __init__(self): dbobject = Modelname.objects.all() def test (self): self.dbobject[0].fieldname = 'some new value'
then I am able to access a specific attribute like so:
objclass = Dbobject() fieldvalue = dbobject.dbobject[0].fieldname
but I want to be able to use the "test" method of the Dbobject class to try to change the specific value on an object's attribute value, but it isn't changing it. I am stumped by this as this is how I thought I am supposed to change an object's attribute value.