ruby - How can I pass extra details from simpleForm elements to my controller in rails -

i'm using simpleform in rails , have 2 fields presented user choose location (a rich association) pre-filtered set of locations. each choice needs saved in join table along type of location is.

how can create form send info controller can tell me 'type' of location being selected.

_new_flow_form.html        <%= simple_form_for @new_flow,:url => {:action => "company_create_flow", :controller => 'flows'}, :html => { :class => 'form-horizontal', :multipart => true } |f| %>              <%= f.label 'workflow title', :class => 'control-label' %>             <%= f.text_field :title, :class => 'form-control' %>              <%= f.association :locations, collection: location.where(:company_id => @company.id, :source => 'true'), :label => 'source location' %>             <%= f.association :locations, collection: location.where(:company_id => @company.id, :destination => 'true'), :label => 'destinations'%>              <%= f.submit nil, :class => 'btn btn-primary' %>       <% end %> 

for reference, models this:

location.rb

  class flow < activerecord::base     has_many :flow_locations     has_many :locations, :through => :flow_locations   end 

flow.rb

  class location < activerecord::base     has_many :flow_locations     has_many :flows, :through => :flow_locations   end 

flow_location.rb

  class flowlocation < activerecord::base     belongs_to :flow     belongs_to :location      serialize :source     serialize :destination   end 

the current result when form submitted this:

{ "utf8": "✓", "authenticity_token": "z3f4lbyiebmvz4wgfgqgpp7xovelifgse0msak9kfzxp3yoh7sfbjh5upd+mx+prz61bxqwl+e2o3qex3dfyaw==", "flow": {     "title": "testme",     "company_id": "1",     "service_ids": [         "",         "2"     ],     "location_ids": [         "",         "3",         "",         "1"     ] }, "commit": "create flow" } 

and major problem here that, have no way of deciphering of location_ids 'sources' vs ones 'destinations'

can me understand might able different here better view can tell me location_id which?

you can change name attribute of html elements:

<%= f.association :locations, collection: location.where(:company_id => @company.id, :source => 'true'), :label => 'source location' name: "source_ids" %> <%= f.association :locations, collection: location.where(:company_id => @company.id, :destination => 'true'), :label => 'destinations' name: "destination_ids"%> 

but push attribute out of flow object

{ "utf8": "✓", "authenticity_token": "z3f4lbyiebmvz4wgfgqgpp7xovelifgse0msak9kfzxp3yoh7sfbjh5upd+mx+prz61bxqwl+e2o3qex3dfyaw==", "flow": {     "title": "testme",     "company_id": "1",     "service_ids": [         "",         "2"     ]    }, "commit": "create flow", "source_ids":[     "1"  ], "destination_ids":[     "3"  ] } 

or

in rails 4 can use scoped association in flow model:

class flow < activerecord::base   has_many :flow_locations   has_many :destinations, -> { destinations: true }, :class_name => 'location', :through => :flow_locations   has_many :sources, -> { source: true }, :class_name => 'location', :through => :flow_locations   has_many :destinations,  end 

and update view _new_flow_form.html accordingly:

<%= f.association :sources, collection: location.where(:company_id => @company.id, :source => 'true'), :label => 'source location' %> <%= f.association :destinations, collection: location.where(:company_id => @company.id, :destination => 'true'), :label => 'destinations'%>