html - Passing an instance attribute and association method as parameters in a ruby method -


i've written rails helper part of creating data-attributes options within select box.

helper

def list_attributed_options(instance_vars, attr, assoc_method)   instance_vars.map { |instance_var| [instance_var.attr, instance_var.id, { :"data-#{assoc_method}" => instance_var.assoc_method.downcase.gsub(/\s+/, "-")}] } end

view code

<%= f.input :game_id, as: :select, collection: list_attributed_options(@games, "title", "console"), include_blank: "select game" %>

instance_vars represents instance variables used collection (@games), attr represents 1 of instance variables' attributes , assoc_method model belongs to.

instance_var.title = "halo" instance_var.id = 21 instance_var.console = "xbox one"

so example in particular case want name options game's title, name data attribute after console belonging game:

<select>   <option data-console="xbox-one">halo</option>   <option data-console="ps4">ratchet-&-clank</option>   <option data-console="xbox-one">tomb raider</option> </select>

interpolating attr parameter works fine when comes attaching them instance variable when run problems.

if understood want, "title" should "name" instead, yes? in case, instance_var.attr can't work since instance_var doesn't have attr; has name. want instance_var.send(attr.to_sym).


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