The model attributes are not accessible in some cases

[Stranger6667]

E.g this will work:

>>> bounces = postmark.bounces.all()
>>> bounces[0].From
test@example.com

But this will not:

>>> bounces = postmark.bounces.all()
>>> [bounce.From for bounce in bounces]

Traceback:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-36-31dfccff63a0> in <module>()
----> 1 [i.From for i in bounces]

<ipython-input-36-31dfccff63a0> in <listcomp>(.0)
----> 1 [i.From for i in bounces]

AttributeError: 'Bounce' object has no attribute 'From'

Possibly it is related to manipulations with __dict__ in the Model._update method

[Stranger6667]

From is optional - it is not a bug