app/admin/office.rb
ActiveAdmin.register Office do
include AdminFriendlyIdFinder
include AdminImageSidebar
permit_params :name, :text, :url, :hidden, :postalcode, :email,
:organisation_id, :organisation_kind, :subdomain,
:url_text, :telephone, :petition_type_id
filter :name
filter :subdomain
filter :email, filters: [:equals, :contains]
filter :postalcode
filter :text
filter :url
filter :telephone
end