[FreeMarker-user] Date input format vs date output format

[tim]

Is there any way to set the INPUT format of dates independently from the
OUTPUT format of dates??

Background:
I am currently in a German context, so I did
<#setting locale="de">. I want all date output to be in the German date
format, i.e. "dd.MM.yyyy".

However from my data model I have the following input format for dates:
"dd-MM-yyyy".

When I tried to access a date from the data model, it was displayed as-is,
i.e. as "dd-MM-yyyy".
Then I tried to force Freemarker to parse it as a date using ?date. I got
"unparseable date" as a reply.

Then I did
<#setting date_format="dd-MM-yyyy">.
With this setting and using ?date, freemarker accepted the input as a date,
but the output was again in the format "dd-MM-yyyy".

I then reformatted it to the correct format using ?string, but this is not
what I want, because I want to reuse the template for different locales,
i.e. I do not want to have locale specific settings while I process the
data.

I did find a solution to my problem, but I am not sure if this is very
elegant. In the beginning I do

<#setting date_format="yyyy-MM-dd"> -> set INPUT format
...if current locale is DE then...
<#assign output_date_format="dd.MM.yyyy"> -> set OUTPUT format

and while processing my data I do
(some date)?date?string(output_date_format)

This works, but if there is a way to avoid writing
?date?string(output_date_format) behind each and every date, I would be
glad. Guess my solution is also not very performant.

Ideas?



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[Daniel Dekany]

Unfortunately, there's no separate input and output format. In
general, template aren't supposed to do (much) parsing themselves. The
data model should already contain dates as dates. If that's possible.
If not, for now maybe the best would be if for the parsing (input)
part you don't relly on FreeMarker's format support (FreeMarker it's
pretty much only for output). Just create a TemplateMethodModelEx,
let's call it "parse", and then you could write ${parse(someDate)}.

Post by tim
Is there any way to set the INPUT format of dates independently from the
OUTPUT format of dates??
I am currently in a German context, so I did
<#setting locale="de">. I want all date output to be in the German date
format, i.e. "dd.MM.yyyy".
"dd-MM-yyyy".
When I tried to access a date from the data model, it was displayed as-is,
i.e. as "dd-MM-yyyy".
Then I tried to force Freemarker to parse it as a date using ?date. I got
"unparseable date" as a reply.
Then I did
<#setting date_format="dd-MM-yyyy">.
With this setting and using ?date, freemarker accepted the input as a date,
but the output was again in the format "dd-MM-yyyy".
I then reformatted it to the correct format using ?string, but this is not
what I want, because I want to reuse the template for different locales,
i.e. I do not want to have locale specific settings while I process the
data.
I did find a solution to my problem, but I am not sure if this is very
elegant. In the beginning I do
<#setting date_format="yyyy-MM-dd"> -> set INPUT format
...if current locale is DE then...
<#assign output_date_format="dd.MM.yyyy"> -> set OUTPUT format
and while processing my data I do
(some date)?date?string(output_date_format)
This works, but if there is a way to avoid writing
?date?string(output_date_format) behind each and every date, I would be
glad. Guess my solution is also not very performant.
Ideas?
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[tim]

Thanks so much again... from your reply I indirectly understood where the
problem was: the model delivered dates as strings and not dates. The
developer could fix that so now I'm good.




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