class CategorySerializer < BasicCategorySerializer attributes :read_restricted, :available_groups, :auto_close_days, :group_permissions def group_permissions @group_permissions ||= begin perms = object.category_groups.joins(:group).includes(:group).order("groups.name").map do |cg| { permission_type: cg.permission_type, group_name: cg.group.name } end if perms.length == 0 && !object.read_restricted perms << {permission_type: CategoryGroup.permission_types[:full], group_name: :everyone} end perms end end def available_groups Group.order(:name).pluck(:name) - group_permissions.map{|g| g[:group_name]} end end