Felix Schwarz wrote:
> Hi,
>
> in some situations after a validation error occurred, I like to give
> additional information to the user (hints/explanations why some values are
> incorrect)
>
> For example, if a user enters a user name during his registration that is
> already in use, I want to display some additional information on how to
> recover lost passwords. This additional information should be "rich content",
> containing links, images etc.
>
> But not every error in the user name field should trigger that additional
> information (e.g. user name is too short/uses banned words). So what I really
> want is "what type of error occurred".
>
> This information (type of error) is already encoded in the error message (or
> it would be trivial to change the validators that way). But clearly, the
> additional information should not go into the basic validation error message
> as this should not contain any markup code.
>
> Currently I see the following options:
> 1. Don't show additional information: ruled out, requirement from customer.
> 2. Repeat all tests in my view to see what happened: Duplication of efforts,
> error-prone, too much logic in the view.
> 3. Use the error message to decide what information to show: Bad because the
> exact error message is locale dependent and may change in the future.
> 3a. Compare the error message with all error messages in
> ValidatorClass.messages to get the key: view has to know which validator
> was used for for every field which is error prone and fragile.
>
> Ideally, we would be able to extract the message key from the exception
> message and use that to show the additional information. After reading the
> code, I think this is not possible currently.
>
> Any other ideas?
How about:
user_validator = ValidatorClass(messages={'notLoggedIn':
htmlfill.literal('Wrong password. <a href="...">Did you forget your
password?</a>')})
Then htmlfill won't quote the error value when putting it in, and you
can include any markup.
You could also subclass ValidatorClass.message to do dynamic lookup.
Ian
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