method

field_name

v7.1.3.4 - Show latest stable - 0 notes - Class: ActionView::Helpers::FormBuilder

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What's this?

field_name(method, *methods, multiple: false, index: @options[:index]) public

Generate an HTML name attribute value for the given name and field combination

Return the value generated by the FormBuilder for the given attribute name.

<%= form_for @post do |f| %>
  <%= f.text_field :title, name: f.field_name(:title, :subtitle) %>
  <%# => <input type="text" name="post[title][subtitle]"> %>
<% end %>

<%= form_for @post do |f| %>
  <%= f.text_field :tag, name: f.field_name(:tag, multiple: true) %>
  <%# => <input type="text" name="post[tag][]"> %>
<% end %>

Show source

# File actionview/lib/action_view/helpers/form_helper.rb, line 1792
      def field_name(method, *methods, multiple: false, index: @options[:index])
        object_name = @options.fetch(:as) { @object_name }

        @template.field_name(object_name, method, *methods, index: index, multiple: multiple)
      end

field_name

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