Work for short time with :state_current and :state support.

app/models/setting.rb

@@ -31,7 +31,11 @@ set config setting
     if !setting
       fail "Can't find config setting '#{name}'"
     end
-    setting.state_current = { value: value }
+    if setting.respond_to?(:state_current)
+      setting.state_current = { value: value }
+    else
+      setting.state = { value: value }
+    end
     setting.save
     logger.info "Setting.set(#{name}, #{value.inspect})"
   end
@@ -66,9 +70,15 @@ reset config setting to default
     if !setting
       fail "Can't find config setting '#{name}'"
     end
-    setting.state_current = setting.state_initial
-    setting.save
-    logger.info "Setting.reset(#{name}, #{setting.state_current.inspect})"
+    if setting.respond_to?(:state_current)
+      setting.state_current = setting.state_initial
+      setting.save
+      logger.info "Setting.reset(#{name}, #{setting.state_current.inspect})"
+    else
+      setting.state = setting.state_initial
+      setting.save
+      logger.info "Setting.reset(#{name}, #{setting.state_current.inspect})"
+    end
     load
     @@current[:settings_config][name]
   end
@@ -85,9 +95,16 @@ reset config setting to default
 
     # read all config settings
     config = {}
-    Setting.select('name, state_current').order(:id).each { |setting|
-      config[setting.name] = setting.state_current[:value]
-    }
+    s = Setting.new
+    if s.respond_to?(:state_current)
+      Setting.select('name, state_current').order(:id).each { |setting|
+        config[setting.name] = setting.state_current[:value]
+      }
+    else
+      Setting.select('name, state').order(:id).each { |setting|
+        config[setting.name] = setting.state[:value]
+      }
+    end
 
     # config lookups
     config.each { |key, value|
@@ -105,7 +122,11 @@ reset config setting to default
 
   # set initial value in state_initial
   def set_initial
-    self.state_initial = state_current
+    if self.respond_to?(:state_current)
+      self.state_initial = state_current
+    else
+      self.state_initial = state
+    end
   end
 
   # set new cache
@@ -144,6 +165,10 @@ reset config setting to default
   # convert state ot hash to be able to store it as store
   def state_check
     return if state && state.respond_to?('has_key?') && state.key?(:value)
-    self.state_current = { value: state }
+    if self.respond_to?(:state_current)
+      self.state_current = { value: state }
+    else
+      self.state = { value: state }
+    end
   end
 end