On Wednesday, April 15, 2015 at 5:11:22 PM UTC-7, Anthony wrote:
>
> However, I believe (at least in web2py 2.9.12) the first parameter in
>> _after_insert() is NOT a dict, but a Row object. Because, my web2py app
>> uses the following code in db.py, trying to send out a validation email to
>> new registrated user:
>>
>> def customized_email_verification(row, row_id):
>>>
>> db(db.auth_user.id==row_id).update(registration_key="a random
>>> string") # I need this because my users are not registered from web UI
>>
>> db.commit() # commit BEFORE the time consuming email action,
>>> otherwise a parallel requests could cause duplicated record in DB?!
>>
>> auth.settings.mailer.send(to=row["email"], subject="Hi",
>> *message=customized_message
>>> % row*)
>>> db.auth_user._after_insert.append(customized_email_verification)
>>
>>
>> and it ends up with a very confusing error as:
>>
>> TypeError: format requires a mapping
>>
>>
>> Finally I located that line and changed it into:
>>
>> ... customized_message % row.as_dict()
>>
>>
>> and then it works.
>>
>> So I am asking for your confirmation and suggest to fix the book
>> accordingly.
>>
>
> Yes, the first argument is a Row object, so we should probably update the
> book. However, your error is odd because you can generally use a Row object
> in that way without explicitly converting it to a dictionary. What is the
> content of customized_message and the Row object when this error is
> generated?
>
Thanks for the hint, Anthony. You are right, normally "Welcome
%(first_name)s" % row will just work.
In my case, it looks like the error also has some something to do with the
i18n, although I did not really use the translation feature. This is the
last part of the error trace.
File "C:\REPO\web2py\applications\v1\models\db.py", line 134, in
email_verification
message=auth.messages.verify_email % row # .as_dict()
File "C:\REPO\web2py\gluon\tools.py", line 468, in send
elif message.strip().startswith('<html') and \
File "C:\REPO\web2py\gluon\languages.py", line 403, in __getattr__
return getattr(str(self), name)
File "C:\REPO\web2py\gluon\languages.py", line 379, in __str__
self.T.translate(self.m, self.s))
File "C:\REPO\web2py\gluon\languages.py", line 937, in translate
message = self.params_substitution(message, symbols)
File "C:\REPO\web2py\gluon\languages.py", line 914, in params_substitution
message = message % symbols
TypeError: format requires a mapping
The message is the default "Welcome %(first_name)s! Click on the link
%(link)s to verify your email".
The symbols is, interestingly, a TUPLE containing only one item, which is
the string representation of the Row. It looks like:
("<Row \x1e'first_name': 'Ray', ..., 'link': 'http://...'\x1f>",)
No wonder. Now we can use the following line to demonstrate the problem.
>>> "Welcome %(first_name)s, pls click %(link)s" % ("whatever string",)
TypeError: format requires a mapping
I did not further investigate what goes wrong inside the languages.py.
>
>> A followup question. The reason I need my clumsy
>> customized_email_verification() in the first place, is because I seemingly
>> have to do db.commit() BEFORE the time consuming email sending job.
>> Otherwise I saw some randomly duplicated records in my auth_user table. I
>> don't know the exact reason but my guess is, the tools.py's define_tables()
>> uses IS_NOT_IN_DB() validators which only work in web2py level, but does
>> NOT define any "unique=True" in the DB level. Is this considered as a
>> defect?
>>
>
> It's not a defect, just something you have to handle properly in your
> code. You can separately set the unique=True argument when creating the
> model, and that will be enforced by the database,
>
I know I can always define my OTHER tables properly. But now we are talking
about the web2py built-in auth_user table. Do I have to redefine them in my
models/db.py EVERY TIME I start a new project? That doesn't sound right. Is
there any reason we don't want to do that inside gluon/tools.py?
> but your problem then is that an attempted duplicate entry will end up
> raising an exception and returning a 500 response unless you catch and
> handle the error.
>
I can do this part.
>
>
>> Anthony
>
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