After updating item.state with item.previousState(false,"mapdb"), mapdb stops commiting for that item

Setup, Configuration and Use Runtime
1

I have the following rule

rule "update locations"
when
	Time cron "0/10 * * ? * * *"       
then

blinds.members.forEach[item |
logInfo("Logger","Itemname laden: "+item.name)
logInfo("Logger","Itemname laden: "+item.state.toString)
logInfo("Logger","Itemname mapDB: "+item.previousState(false,"mapdb").state.toString)
if (item.state == NULL)
{
item.postUpdate(item.previousState(false,"mapdb").state)
}
]



end

which updates blinds with a number if they have a NULL value, (this happens after updating the items file)

This works fine, but after the values update, they no longer commit to mapdb.
other items and switches that are not in this rule commit fine.

Any idea why mapdb would not commit the update/change on these items, only after i run the rule?

it takes a restart of OH to fix, which in turn is also what i can do after upating items files to remove the null values.

Please help.

My items file

// This is the items file

Group mapDB 
Group:Switch:OR(ON,OFF) OutdoorLighting "Outdoor Lights [%s]" <light>
Group:Switch:OR(ON,OFF) IndoorLighting "Indoor Lights [%s]"  <light>  (mapDB) 
Group:Switch:OR(ON,OFF) gIrrigation "Irrigation [%s]" <faucet> (mapDB)
Group gIrrigationTimes (mapDB)
Group GNeato
Group gAlarm 
Group:Switch:OR(ON,OFF) gPresence
Group:Dimmer:AVG blinds "Blinds are [SCALE(blinds.scale):%s]" (mapDB)
Group Garage (mapDB)
Group gTimepicker (mapDB)

//*********************************
//Time PIcker
//***********

String TransferItem "[%s]"      (gTimepicker)
String SprinklerZone "[%s]"		

//*********************************
//Lighting
//***********
Switch FrontDownlights 		"Front Downlights"	<light> (OutdoorLighting) [ "Switchable" ] 	{ mqtt="<[broker:stat/FrontDownlightsSonoff/POWER:state:default],>[broker:cmnd/FrontDownlightsSonoff/power:command:*:default]" }
Number FrontDownlight_RSSI 	"Front Downlight: RSSI [%d %%]"  					{ mqtt="<[broker:tele/FrontDownlightsSonoff/STATE:state:JSONPATH($.Wifi.RSSI)]" }
String FrontDownlight_IP 	"Get Info"  										{ mqtt=">[broker:cmnd/FrontDownlightsSonoff/IPAddress1:command:*:*]" }
String FrontDownlight_IP_String "Info [%s]"	 									{ mqtt="<[broker:stat/FrontDownlightsSonoff/RESULT:state:default]" }
String FrontDownlightStateString	"Info"										{ mqtt="<[broker:tele/FrontDownlightsSonoff/STATE:state:default]" } //hidden string to be updated depending on status 


Switch BackyardLights 		"Backyard lights"	<light> (OutdoorLighting)   [ "Switchable" ]	{ mqtt="<[broker:stat/BackyardLights/POWER:state:default],>[broker:cmnd/BackyardLights/power:command:*:default]" }
Number BackyardLights_RSSI 	"Backyard lights: RSSI [%d %%]"  								{ mqtt="<[broker:tele/BackyardLights/STATE:state:JSONPATH($.Wifi.RSSI)]" }
String BackyardLights_IP 	"Get Info"  													{ mqtt=">[broker:cmnd/BackyardLights/IPAddress1:command:*:*]" }
String BackyardLights_IP_String "Info [%s]"	 												{ mqtt="<[broker:stat/BackyardLights/RESULT:state:default]" }
String BackyardLightsStateString	"Info"													{ mqtt="<[broker:tele/BackyardLights/STATE :state:default]" } //hidden string to be updated depending on status 

Switch GarageLights 		"Garage lights"	<light>   (IndoorLighting)  [ "Switchable" ]   { mqtt="<[broker:stat/GarageLights/POWER:state:default],>[broker:cmnd/GarageLights/power:command:*:default]" }
Number GarageLights_RSSI 	"Garage lights: RSSI [%d %%]"  								{ mqtt="<[broker:tele/GarageLights/STATE:state:JSONPATH($.Wifi.RSSI)]" }
String GarageLights_IP 	"Get Info"  													{ mqtt=">[broker:cmnd/GarageLights/IPAddress1:command:*:*]" }
String GarageLights_IP_String "Info [%s]"	 											{ mqtt="<[broker:stat/GarageLights/RESULT:state:default]" }
String GarageLightsStateString	"Info"													{ mqtt="<[broker:tele/GarageLights/STATE :state:default]" } //hidden string to be updated depending on status 

Switch LoungeLight 		"Lounge room Light"	<light> (IndoorLighting)           [ "Switchable" ]   { mqtt="<[broker:stat/LoungeLight/POWER:state:default],>[broker:cmnd/LoungeLight/power:command:*:default]" }
Number LoungeLight_RSSI 	"Lounge room Light: RSSI [%d %%]"  								{ mqtt="<[broker:tele/LoungeLight/STATE:state:JSONPATH($.Wifi.RSSI)]" }
String LoungeLight_IP 	"Get Info"  													{ mqtt=">[broker:cmnd/LoungeLight/IPAddress1:command:*:*]" }
String LoungeLight_IP_String "Info [%s]"	 												{ mqtt="<[broker:stat/LoungeLight/RESULT:state:default]" }
String LoungeLightStateString	"Info"													{ mqtt="<[broker:tele/LoungeLight/STATE :state:default]" } //hidden string to be updated depending on status 

//*********************************
//Blinds
//***********
Number MainBedBlindsSettings															{ mqtt=">[broker:MainBedBlinds/1:command:*:default]" }
Number MainBedBlindsLocation															{ mqtt=">[broker:MainBedBlinds/1:command:*:default]" }
Dimmer MainBedBlinds1 	"Master Bedroom First Window [%d]"  	<none>	(blinds)		[ "Switchable" ] 	{ mqtt="<[broker:MainBedBlinds/Location/1:state:default],>[broker:MainBedBlinds/1:command:*:default]" }
Dimmer MainBedBlinds2 	"Master Bedroom Second Window [%d]"  	<none>	(blinds)		[ "Switchable" ] 	{ mqtt="<[broker:MainBedBlinds/Location/2:state:default],>[broker:MainBedBlinds/2:command:*:default]" }
Dimmer MainBedBlinds3 	"Master Bedroom Third Window [%d]"  	<none>	(blinds)		[ "Switchable" ] 	{ mqtt="<[broker:MainBedBlinds/Location/3:state:default],>[broker:MainBedBlinds/3:command:*:default]" }
Dimmer AllMainBlinds "Master Bedroom Blinds"						[ "Switchable" ] 

String MainBlindStatus	{ mqtt="<[broker:MainBedBlinds/status/get:state:default]" } //hidden string to be updated depending on status

DateTime BedBlindsOnline "Last Online at [%1$tl:%1$tM%1$tp on %1$tA, %1$tB %1$te, %1$tY]"  
															


Number LoungeBlindsSettings																					{ mqtt=">[broker:LoungeBlinds/1:command:*:default]" }
Number LoungeBlindsLocation																					{ mqtt=">[broker:LoungeBlinds/1:command:*:default]" }	
Dimmer LoungeBlinds1 	"Lounge First Window [%d]"  			<none>	(blinds)		[ "Switchable" ]	{ mqtt="<[broker:LoungeBlinds/Location/1:state:default],>[broker:LoungeBlinds/1:command:*:default]" }
Dimmer LoungeBlinds2	"Lounge Second Window [%d]"  			<none>	(blinds)		[ "Switchable" ]	{ mqtt="<[broker:LoungeBlinds/Location/2:state:default],>[broker:LoungeBlinds/2:command:*:default]" }
Dimmer LoungeBlinds3 	"Lounge Third Window [%d]"  			<none>	(blinds)		[ "Switchable" ]	{ mqtt="<[broker:LoungeBlinds/Location/3:state:default],>[broker:LoungeBlinds/3:command:*:default]" }
Dimmer AllLoungeBlinds "All Lounge Blinds"												[ "Switchable" ]


String LoungeBlindsStatus	{ mqtt="<[broker:LoungeBlinds/status/get:state:default]" } //hidden string to be updated depending on status

DateTime LoungeBlindsLastOnline "Last Online at [%1$tl:%1$tM%1$tp on %1$tA, %1$tB %1$te, %1$tY]"


Dimmer AllBlinds "All Blinds"				[ "Switchable" ]	


//*********************************
//Sprinkler System
//***********


String Irrigation_Zone1  	(gIrrigationTimes)
String Irrigation_Zone2 	(gIrrigationTimes)
String Irrigation_Zone3 	(gIrrigationTimes)
String Irrigation_Zone4 	(gIrrigationTimes)


Switch SprinklerSystemZone1 "Front Grass Sprinklers"     	(gIrrigation)      	[ "Switchable" ] 	{ mqtt=">[broker:SprinklerSystem:command:ON:Z1ON],>[broker:SprinklerSystem:command:OFF:Z1OFF]" }
Switch SprinklerSystemZone2 "Front Garden Sprinklers" 	   	(gIrrigation)	 	[ "Switchable" ] 	{ mqtt=">[broker:SprinklerSystem:command:ON:Z2ON],>[broker:SprinklerSystem:command:OFF:Z2OFF]" }
Switch SprinklerSystemZone3 "Back Grass Sprinklers" 		(gIrrigation)		[ "Switchable" ] 	{ mqtt=">[broker:SprinklerSystem:command:ON:Z3ON],>[broker:SprinklerSystem:command:OFF:Z3OFF]" }
Switch SprinklerSystemZone4 "Back Garden Sprinklers" 		(gIrrigation)		[ "Switchable" ] 	{ mqtt=">[broker:SprinklerSystem:command:ON:Z4ON],>[broker:SprinklerSystem:command:OFF:Z4OFF]" }

Number Countdown_Zone1 		"Minutes Remaining [%d]"	(gIrrigationTimes)
Number Countdown_Zone2 		"Minutes Remaining [%d]"	(gIrrigationTimes)
Number Countdown_Zone3		"Minutes Remaining [%d]"	(gIrrigationTimes)
Number Countdown_Zone4 		"Minutes Remaining [%d]"    (gIrrigationTimes)
                         
Switch SprinklerSystemSchedule1 "Front Grass Schedule"  	(gIrrigationTimes)
Switch SprinklerSystemSchedule2 "Front Garden Schedule" 	(gIrrigationTimes)		
Switch SprinklerSystemSchedule3 "Back Grass Schedule" 		(gIrrigationTimes)	
Switch SprinklerSystemSchedule4 "Back Garden Schedule"  	(gIrrigationTimes)

DateTime Irrigation_StartTime1  "Zone 1 Last Watered [%1$ta %1$tR]"  (gIrrigationTimes)
DateTime Irrigation_StartTime2  "Zone 2 Last Watered [%1$ta %1$tR]"  (gIrrigationTimes)
DateTime Irrigation_StartTime3  "Zone 3 Last Watered [%1$ta %1$tR]"  (gIrrigationTimes)
DateTime Irrigation_StartTime4  "Zone 4 Last Watered [%1$ta %1$tR]"  (gIrrigationTimes)



Number onHours1 "Front Grass Sprinkler Minutes" 	(gIrrigationTimes)
Number onHours2 "Front Garden Sprinkler Minutes"	(gIrrigationTimes)
Number onHours3 "Back Grass Sprinkler Minutes"		(gIrrigationTimes)
Number onHours4 "Back Garden Sprinkler Minutes"		(gIrrigationTimes)



String IFTTString "If this then that string" (All)


DateTime Sunset_Time        "Sunset [%1$tH:%1$tM]"                    { channel="astro:sun:local:set#start" }

//*********************************
//alarm
//***********


String AlarmKeypad
Switch Unlocked
String KeypadString
Switch ARM "Arm"  		(gAlarm)  [ "Switchable" ]
Switch DISARM "Disarm"  (gAlarm)  [ "Switchable" ]
Switch STAY "Stay"      (gAlarm)  [ "Switchable" ]

String AlarmString 		"Alarm"	<alarm> (gAlarm)      [ "Switchable" ]   
String Alarm															{ mqtt=">[broker:AlarmSystem:command:*:Default]" }

//*********************************
//Garage Door
//***********


Switch GarageDoorSwitch		"Garage Door"									[ "Switchable" ] 				{ mqtt=">[broker:cmnd/GarageDoorSonoff/POWER:command:*:default]" }
Rollershutter GarageDoor		 
String GarageDoorState 			          	
Switch GarageDoorClosed										(Garage)					{ mqtt="<[broker:cmnd/GarageDoorSensors/POWER1:state:default]" }
Switch GarageDoorOpened										(Garage)					{ mqtt="<[broker:cmnd/GarageDoorSensors/POWER2:state:default]" }
Number Garage_RSSI 	"Garage: RSSI [%d %%]"  									{ mqtt="<[broker:tele/GarageDoorSonoff/STATE:state:JSONPATH($.Wifi.RSSI)]" }
String Garage_IP 	"Get Info"  												{ mqtt=">[broker:cmnd/GarageDoorSonoff/IPAddress1:command:*:*]" }
String Garage_IP_String "Info [%s]"	 											{ mqtt="<[broker:stat/GarageDoorSonoff/RESULT:state:default]" }
Switch GarageDoorAuto "Garage Door auto close 9PM-5AM" 		(Garage)
Switch GarageDoorStateUpdate 													{ mqtt=">[broker:cmnd/GarageDoorSonoff/STATUS:command:*:10]" } //hidden button to get update of garage door status. Runs every minute
String GarageDoorStateString													{ mqtt="<[broker:tele/GarageDoorSonoff/SENSOR:state:default]" } //hidden string to be updated depending on status 



//*********************************
//Sonof Reboot Items
//***********

String	Sonoff_Action "All Sonoff Devices" <sonoff_basic>

//*********************************
//Network Devices online
//***********
Switch ChrisPhone 					(gPresence)											{channel="network:pingdevice:192_168_0_149:online"}
Switch AimeePhone					(gPresence)											{channel="network:pingdevice:192_168_0_187:online"}
//Switch LoungeBlindsPresence					(gPresence)											{channel="network:pingdevice:192_168_0_163:online"}

Number FrontGrassMoisture									(gIrrigationTimes)								{ mqtt="<[broker:FrontGrassSensor/Stat:state:default]" }	
DateTime FrontGrassMoistureTime        "Last Updated [%1$ta %1$tR]"        	(gIrrigationTimes)            
					
//************************************

and mapdb file

# the commit interval in seconds (optional, default to '5')
commitinterval=10



# issue a commit even if the state did not change (optional, defaults to 'false')
commitsamestate=false

Strategies {
	default = everyUpdate
}
Items {
  mapDB : strategy = everyChange, restoreOnStartup
  mapDB*: strategy = everyChange, restoreOnStartup
}-++
2

Did you try:

item.previousState("mapdb").state

Because mapdb only store one value there is no reason to use false or true in the previousState method
Also the false parameter in undocumented

3

Seconded. previousState() does not return a straightforward state, it is a historic state, a different type of object with e.g. timestamp

Highlighted under ‘extensions’ -

4

There was a bug where it wouldn’t persist the first change after an item got updated from null to a non-null value. It should be fixed in 2.4.0-SNAPSHOT with:

5

Thanks for the info. I was able to get around it by removing the tags in my items fine. Saving and then putting the tags back and saving. This stopped the items from being set to null. But when will the 2.4.0 snapshot be updated and how do I update.

6

It’s already part of the 2.4.0-SNAPSHOT builds. Updating to the SNAPSHOT builds depends on your installation method. See also the Installation documentation.

7

Thanks for that