How does one format a time when serializing an active record object? Server side somehow or leave it up to client side javascript? -tim
Tim W. wrote:> How does one format a time when serializing an active record object?I''m not sure I quite follow your question, but I do know that the to_json method as implemented in Rails uses the same date and time formats as does to_xml. Example: "2009-08-19T13:03:07Z"> Server side somehow or leave it up to client side javascript?In the case of to_json the serialization of date and time gets formatted as a string on the server-side. I assume if you were to use that data in JavaScript (client-side) you would need to parse the string date/time format to a JavaScript Date object. I''m sure you could find a JS code snippet to handle that. -- Posted via http://www.ruby-forum.com/.
Yeah.. I was basically wonder what the best practice / preferred
method for this was.
When using ajax and json to update a page with a new object that
includes a date.. (like created_at) and you want that date to be only
month and day.. Do you parse the date on the server side and send over
as string (Is that possible with to_json?) or do you send over the
default ISO format and do the conversion on the client side in
javascript.
I''d like to do it on the server side, but then the only way I can see
is a complete hack around by adding another method to the ActiveRecord
class.
def created_at_formatted
self.created_at.to_S(''md'')
end
object.to_json( :methods => [:created_at_formatted] )
-tim
On Aug 19, 9:19 am, Robert Walker
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:> Tim W. wrote:
> > How does one format a time when serializing an active record object?
>
> I''m not sure I quite follow your question, but I do know that the
> to_json method as implemented in Rails uses the same date and time
> formats as does to_xml.
>
> Example:
> "2009-08-19T13:03:07Z"
>
> > Server side somehow or leave it up to client side javascript?
>
> In the case of to_json the serialization of date and time gets formatted
> as a string on the server-side. I assume if you were to use that data in
> JavaScript (client-side) you would need to parse the string date/time
> format to a JavaScript Date object. I''m sure you could find a JS
code
> snippet to handle that.
> --
> Posted viahttp://www.ruby-forum.com/.
Tim W. wrote:> I''d like to do it on the server side, but then the only way I can see > is a complete hack around by adding another method to the ActiveRecord > class. > > def created_at_formatted > self.created_at.to_S(''md'') > end > > object.to_json( :methods => [:created_at_formatted] )Model objects should not be responsible for formatting data for presentation. This responsibility should be implemented in view objects (or view helper objects such as formatter objects). -- Posted via http://www.ruby-forum.com/.
That is why I mentioned it was a hack.. I take it there is no way to do it via the to_json method which is the view at this point? Thanks.. -tim On Aug 19, 3:46 pm, Robert Walker <rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org> wrote:> Tim W. wrote: > > I''d like to do it on the server side, but then the only way I can see > > is a complete hack around by adding another method to the ActiveRecord > > class. > > > def created_at_formatted > > self.created_at.to_S(''md'') > > end > > > object.to_json( :methods => [:created_at_formatted] ) > > Model objects should not be responsible for formatting data for > presentation. This responsibility should be implemented in view objects > (or view helper objects such as formatter objects). > -- > Posted viahttp://www.ruby-forum.com/.
Tim W. wrote:> That is why I mentioned it was a hack.. > > I take it there is no way to do it via the to_json method which is the > view at this point?Given that JSON offers no data type for storing date and time information, a choice must be made. Rails core team, I believe smartly, decided to borrow the string representation of time from XML, which does define standard date and time representations. I would not call this a view. In the same way as databases store representations of the data, so does the serialized string of JSON or XML. What I was getting at in my previous reply was that regardless of how the data is actually stored in a data model (whether that be in model objects, a database or a serialized string) it is still the responsibility of the view layer in MVC to format the data for presentation to the user. Even though the serialized date may be stored as "2009-08-19T13:03:07Z" you probably would not want to present that to the end user. They would probably prefer something based on their own locale. In the US that might be: "August 19, 2009 9:00 AM" or in Europe maybe something like "19 August 2009 09:00." If I''m not mistaken you can use I18n (Internationalization) in Rails to format dates based on the user''s locale. Given that JSON (or XML) are not what you present to end users, you would store the date and time in a way meaningful to your model. Only when you present that data to a human do you run the data through formatters for presentation. -- Posted via http://www.ruby-forum.com/.