Thank you very much. By the way, I realized that I sent out without
completing the subject. :)
On Tuesday, April 5, 2016 at 10:37:02 PM UTC-7, Dave S wrote:
>
>
>
> On Tuesday, April 5, 2016 at 10:04:47 PM UTC-7, SanDiego wrote:
>>
>> I wanted to use translatable fields using T() function. I couldn't find
>> any information for this in the document. I could only find the info from
>> forum discussions. But still there are some problems:
>>
>>
>> COURSES = {'math': T('Math'), 'phy': T('Physics')}
>> ...
>> Field(course, requires=IS_IN_SET(COURSES))
>>
>>
>>
> shouldn't you be setting the type to string? That's the default type,
> but it may have benefits to be explicit.
>
> works. Only keys (e.g. 'phy') are stored in DB and COURSES dictionary can
>> be used to display the value (e.g. COURSES['phy']). However, order is
>> not retained.
>>
>>
>>
>> Massimo recommends using sets to retain the order here
>> <https://groups.google.com/d/msg/web2py/Q51pSDExMcE/m-q85-PVggAJ>:
>>
>
> I think he's recommending a tuple of tuples. (I'm surprised it isn't a
> list of tuples, as in the book)
> <URL;
> http://web2py.com/books/default/chapter/29/07/forms-and-validators#Range--set-and-equality-validators
> >
> then scroll down to IS_IN_SET().
>
>
>
>>
>> COURSES = (('math', T('Math')), ('phy', T('Physics')))
>> ...
>> Field(course, requires=IS_IN_SET(COURSES))
>>
>>
>> This time order is retained but then display will be problematic. Probably
>> we can use list comprehension to display the translated value but not very
>> intuitive.
>>
>>
>>
>
> Are you sure the drop down menu isn't created for you? The example in the
> book suggests that it is.
>
Dropdown menu is created as expected. When viewing the page after saving
it, the keys are displayed. I guess I need to write a function to return
the T() function counterpart value for the view.
>
>
>
>> My questions are:
>>
>> - Is there an easy way for retaining the order and displaying
>> correctly?
>>
>>
> This works good for the tuples case as you pointed out.
> see above
>
>>
>> -
>> - How can we set the default value? e.g. if we set default to 'phy',
>> I still want to show COURSES['phy'] in the dropdown menu in the form
>>
>>
> would that be Field("Courses", "string", default=COURSES[1],
> requires=IS_IN_SET(COURSES)) ?
>
>>
>> - Would it be possible to add more info and examples for this
>> function in the documentation? I think this is very basic function and
>> used
>> extensively.
>>
>> The material at the URL seems clear enough, although it doesn't show
> using the T() function. What do you suggest is missing?
>
I couldn't find the help page. I searched the book both on the page (See
attachments) and using Google but that is not listed. Is there anyway to
improve the search feature? The material is sufficient. I should have gone
through the forms/validators section more thoroughly.
>
> /dps
>
Thanks.
S/
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