Redmine/lib/generators/redmine_plugin_model/templates/migration.rb

class <%= @migration_class_name %> < ActiveRecord::Migration
  def change
    create_table :<%= @table_name %> do |t|
<% attributes.each  do |attribute| -%>
      t.<%= attribute.type %> :<%= attribute.name %><%= attribute.inject_options %>
<% end  -%>
<% if  options[:timestamps] %>
      t.timestamps
<% end  -%>
    end
<% attributes_with_index.each  do |attribute| -%>
    add_index :<%= table_name %>, :<%= attribute.index_name %><%= attribute.inject_index_options %>
<% end  -%>
  end
end