I've found why there was a difference between these similar situations.
First of the os.path.exists test I need to add a test for checking if the
field is empty or not:
if user.image_user32x32:
----------------------
Gael Princivalle
2017-02-19 7:58 GMT+01:00 Gael Princivalle <gaelprinciva...@gmail.com>:
> Thank you Leonel but u.image_user16x16 contains always the file name, so
> the test will return always True.
> The problem is that the image file is not created on the disk so I have to
> test if it exist.
>
> At this point it's not so easy to do.
> The application call for these computed images from the auth.user session
> and tables that have the auth.signature.
>
> This works:
> os.path.exists(os.path.join(request.folder,'uploads',auth.user.
> image_user16x16))
>
> This works:
> event = db.events(event_id)
> os.path.exists(os.path.join(request.folder,'uploads',event.created_by.
> image_user32x32))
>
> This works:
> event_comments = db(db.events_comments.commented_event == event_id).select
> (orderby=db.events_comments.created_on)
> os.path.exists(os.path.join(request.folder,'uploads',event_comment.
> created_by.image_user32x32))
>
> This don't works:
> user_followers = db((db.followers.to_user == to_user_id) &
> (db.followers.status
> == True)).select()
> os.path.exists(os.path.join(request.folder,'uploads',user_follower.
> created_by.image_user32x32))
>
> Traceback is:
> File "/home/tasko/webapps/w2p_2_14_16/web2py/gluon/restricted.py", line
> 227, in restricted
> exec ccode in environment
> File "/home/tasko/webapps/w2p_2_14_16/web2py/applications/
> mtbconnection/controllers/f_ajax.py", line 1081, in <module>
> File "/home/tasko/webapps/w2p_2_14_16/web2py/gluon/globals.py", line 417
> , in <lambda>
> self._caller = lambda f: f()
> File "/home/tasko/webapps/w2p_2_14_16/web2py/gluon/tools.py", line 4241,
> in f
> return action(*a, **b)
> File "/home/tasko/webapps/w2p_2_14_16/web2py/applications/
> mtbconnection/controllers/f_ajax.py", line 143, in get_followers
> if os.path.exists(os.path.join(request.folder,'uploads',user_follower.
> created_by.image_user32x32)):
> File "/usr/lib64/python2.7/posixpath.py", line 75, in join
> if b.startswith('/'):
> AttributeError: 'NoneType' object has no attribute 'startswith'
>
> And also this don't works, same error:
> events = db((period_query) &
> (db.events.geometry.st_within(geoPolygon((west, south), (
> east, south), (east, north), (west, north), (west, south))))).select(
> limitby=(0, 50),
> orderby=db.events.event_datetime)
> os.path.exists(os.path.join(request.folder,'uploads',event.created_by.
> image_user32x32))
>
> Traceback is:
> File "/home/tasko/webapps/w2p_2_14_16/web2py/gluon/restricted.py", line
> 227, in restricted
> exec ccode in environment
> File "/home/tasko/webapps/w2p_2_14_16/web2py/applications/
> mtbconnection/controllers/f_ajax.py", line 1081, in <module>
> File "/home/tasko/webapps/w2p_2_14_16/web2py/gluon/globals.py", line 417,
> in <lambda>
> self._caller = lambda f: f()
> File "/home/tasko/webapps/w2p_2_14_16/web2py/applications/
> mtbconnection/controllers/f_ajax.py", line 352, in get_main_events
> html = get_events_html(events)
> File "/home/tasko/webapps/w2p_2_14_16/web2py/applications/
> mtbconnection/controllers/f_ajax.py", line 169, in get_events_html
> if os.path.exists(os.path.join(request.folder,'uploads',event.created_by
> .image_user32x32)):
> File "/usr/lib64/python2.7/posixpath.py", line 75, in join
> if b.startswith('/'):
> AttributeError: 'NoneType' object has no attribute 'startswith'
>
>
> The two situations where it don't works are similar to events_comments
> situation that works. What could be the difference?
> If I replace "if os.path..." with the simple test if
> "event.created_by.image_user32x32" I don't have this 'NoneType' error.
>
> I 've found on the web this about the NoneType error:
>
>> NoneType means that instead of an instance of whatever Class or Object
>> you think you're working with, you've actually got None. That usually means
>> that an assignment or function call up above failed or returned an
>> unexpected result.
>
>
> Ok, but I cannot understand where is this attribute that don't exist.
> Someone can give me a hand?
>
> Il giorno sabato 18 febbraio 2017 18:14:30 UTC+1, Leonel Câmara ha scritto:
>>
>> Gael that's one of the bugs i've referred fo computed fields they are not
>> updated in session.
>>
>> Notice that you use
>>
>> *auth.user*.image_user16x16
>>
>> Well auth.user is nothing other than *session*.auth.user
>>
>> You are also using os.path.exists wrong as you're giving it an URL.
>>
>> For instance I'm sure this will work after register:
>>
>>
>> # put this function in a model
>> def get_img(user):
>> u = db.auth_user[user.id]
>> if u and u.image_user16x16:
>> return URL('default', 'download', args=u.image_user16x16)
>> else:
>> return URL('static/images', 'favicon.png')
>>
>> # then in a view
>> <img src="{{=get_img(auth.user)}}">
>>
>> Note that this solution is very inefficient because you are reloading the
>> user from the database, just for this image, every single time. My point is
>> that this will prove to you that this is a session not being updated
>> problem.
>>
>>
>> --
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