I have an array like this:
['New York', 'Los Angeles']
And I want to be able to generate a select/option with those values in a form like this:
<%= form_tag filter_city_path, :method=> get do %>
<%= select_tag "city", @list_of_cities %>
<% end %>
But this is not working. As you can see I want to pass the selection as city in the url.
You need to use options_for_select helper like
<%= select_tag "city", options_for_select([['New York' ,'New york'], ['Los Angeles', 'Los Angeles']]) %>
cities.collect { |c| [ c, c ] } would do the job of expanding it.My method for this is to build the array as a constant in the model, force confirmation to options listed in the constant, and call it from the view
class Show < ApplicationRecord
DAYS = [ "monday", "tuesday", "wednesday", "thursday","friday", "saturday","sunday"]
validates :day, inclusion: DAYS
end
If you want the option for that field to be submitted without content you'll have to call `allow_blank: true' in the validation as well. Once that is set up you can call the constant to populate the view in the form as so:
<%= select_tag "day", options_for_select(Show::DAYS) %>
or
<%= select_tag "day", options_for_select(Show::DAYS.sort) %>
if you want it presorted (which makes no sense with days of the week...)
It looks like your array doesn't have enough argument. Please refer to this guide.
The options typically needs to be formatted in this way:
[['Lisbon', 1], ['Madrid', 2], ...]
Take note the value 1, 2, etc.
