Question

I have a form that passes the same parameters as the form before it:

<%= form_tag({:controller => "workouts", :action => "random"}) do %>
<%= hidden_field_tag :workout, params[:workout] %>
<%= hidden_field_tag :time, params[:time] %>
<%= submit_tag "Get Another", :class => 'btn' %>

The first form works fine, the second form to “get another” gives me the error can't convert Symbol into Integer for this line:

@equipment_ids = params[:workout][:equipment_ids].collect{|s| s.to_i}

The params of the first and second form being passed are:

 {"utf8"=>"✓",
 "authenticity_token"=>"qj/Q/YWvLKK3A3paAnEom4oTFtq44daX6dvEb8qmgtE=",
 "workout"=>{"equipment_ids"=>["",
 "508",
 "518"]},
 "time"=>"25",
 "commit"=>"Get Workout"}


 {"utf8"=>"✓",
  "authenticity_token"=>"qj/Q/YWvLKK3A3paAnEom4oTFtq44daX6dvEb8qmgtE=",
  "workout"=>"{\"equipment_ids\"=>[\"\",
  \"508\",
  \"518\"]}",
  "time"=>"25",
  "commit"=>"Get Another"}

The only difference is the escaping backslashes. I’m not sure why these would cause a problem?

Answer 1

Changed the hidden field tag to:

<%= hidden_field_tag "workout[equipment_ids][]", params[:workout][:equipment_ids] %>