Radio buttons in rails not taking default value based on the data stored in the database

Question

Am trying to create a profile page where the user can check "male" or "female". After saving the form, whenever the user visits the page again, the gender must be set by default based on the data stored in the database.

Am using the form_for helper here.

<%= form_for @profile do |f| %>
  <%= f.label :gender, "Male", :value => "m" do %>
    <%= f.radio_button :gender, "m" %>
  <% end %>
  <%= f.label :gender, "Female", :value => "f" do %>
    <%= f.radio_button :gender, "f" %>
  <% end %>
<% end %>

Answer 1

I this you should use like this way:

<% form_for( @profile) do |f| %>
  <%= f.radio_button :gender, "Male", :checked => @profile.is_male? %>
  <%= f.radio_button :gender, "Female",:checked => @profile.is_female? %>
<% end %>

In your models/profile.rb:

class Profile
  def is_male?
     #write your code for check male
  end

  def is_female?
     #write your code for check female
  end
end