I have tested this and for me it returns the emails properly.

Check if len(rows)==4

If NO, you are connected to a different database or so,

if YES, there is some setting to make/skip table sub-objects. So try both: 
row.email, row.auth_user.email




Dne pátek 26. května 2017 13:08:39 UTC+2 Arthur Gilbert napsal(a):
>
> The web2py book - Chapter 6 says:
>
> *DAL Rows* 
> is the object returned by a database select. It can be thought of as a 
> list of Row rows:
>
>
> rows = db(db.mytable.myfield != None).select()
>  
>
> *Row* contains field values.
>
>
> for row in rows:
>     print row.myfield  
>
> Why does my code:
>
> rows = db(db.auth_user.email !=None).select()
> for row in rows:
>     print row.email
>
> print None? 
>
> There are 4 users with email addresses in the auth_user DB
>
>

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