How to dynamically called RESTful route helpers

Rails
1

All,

I’m writing a generic application helper that will take an object and
then attempt to generate the name of the appropriate RESTful route
helper for POST and PUT.

Here it is so far:

def get_form_url(object)
tableized_name = object.class.name.tableize
update_helper = “#{tableized_name}_url”

#This should return the correct URL based on whether the object is new
or not.
#But what should be in ???
???.send(‘update_helper’, object)
end

So, as an example, if I have an object of type “ServiceOption”, then the
update_helper will be “service_options_url”, which assuming that there
is a
“map.resources :service_options” line in my routes.rb, will be a valid
URL helper for this object.

The trick is I need to dynamically call the URL helper and I don’t know
which object to send the message to.

What should ??? be above.

Thanks,
Wes

2

Correction:

def get_form_url(object)
tableized_name = object.class.name.tableize
update_helper = “#{tableized_name}_url”

#This should return the correct URL based on whether the object is new
or not.
#But what should be in ???
???.send(update_helper, object)
end

3

ANSWER:

This is what the method should look like:

def get_update_url(object)
camel_case_object_name = object.class.name.underscore
eval("#{camel_case_object_name}_url(object)")
end

My problem was the camel case version of the class name was plural
(tableize vs. underscore inflection).

This seems to work fine.

Thanks,
Wes