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class <%= migration_class_name %> < ActiveRecord::Migration
def self.up
<% attributes.each do |attribute| -%>
<%- if migration_action -%>
<%= migration_action %>_column :<%= table_name %>, :<%= attribute.name %><% if migration_action == 'add' %>, :<%= attribute.type %><% end %>
<%- end -%>
<%- end -%>
end
def self.down
<% attributes.reverse.each do |attribute| -%>
<%- if migration_action -%>
<%= migration_action == 'add' ? 'remove' : 'add' %>_column :<%= table_name %>, :<%= attribute.name %><% if migration_action == 'remove' %>, :<%= attribute.type %><% end %>
<%- end -%>
<%- end -%>
end
end
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