# UI Button with dynamic topic based on state
**URL:** https://discourse.nodered.org/t/ui-button-with-dynamic-topic-based-on-state/14003
**Category:** General
**Created:** [4 August 2019 22:09 UTC](https://discourse.nodered.org/t/ui-button-with-dynamic-topic-based-on-state/14003 "2019-08-04T22:09:11Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@biz](https://discourse.nodered.org/u/biz)
#### Post date: [4 August 2019 22:09 UTC](https://discourse.nodered.org/t/ui-button-with-dynamic-topic-based-on-state/14003/1 "2019-08-04T22:09:11Z")
Hello All
I have been slowly integrating all my flows into databases. This has been great below is one of my standard flows. To update/insert into the datebase I have to create a msg.topic put the SQL statement in , it is then pushed usually to a functoin node , I do some processing with the msg.payload and put it into the SQL msg.topic and pass it to the database.
Is there anyway to simplify this? My thought was within a UI Switch node. if it can dynamically update the topic portion of it when I click the button. This would cut out me having to mess with function nodes to combine it all together
For for example
I have a Switch node with topic "UPDATE `schedule` SET `weekend_off = "switchnodepayload" WHERE`ID` = '0'
When I turn it on it would output msg.topic as "UPDATE `schedule` SET `weekend_off =`1`WHERE`ID` = '0'
or when it is off
"UPDATE `schedule` SET `weekend_off =`0`WHERE`ID` = '0'"
A previous thread someone suggested jsonata which helped me with database items. Can Jsonata be used like this? or is there another solution?
Not a huge deal its mearly me just trying to optimise the fows 🙂
Edit: forgot flow
```auto
[{"id":"e5837169.54004","type":"ui_text_input","z":"9b0017f2.d74bd8","name":"","label":"One Off Time Off","tooltip":"","group":"3fa1d099.a3e7c","order":20,"width":0,"height":0,"passthru":false,"mode":"time","delay":"500","topic":"","x":570,"y":2280,"wires":[["355d89fe.d4ad26"]]},{"id":"ef0e6a9a.f5f2d8","type":"mysql","z":"9b0017f2.d74bd8","mydb":"9c584dac.bb0a6","name":"","x":290,"y":2280,"wires":[["cd07c0e7.a73f5"]]},{"id":"cd07c0e7.a73f5","type":"function","z":"9b0017f2.d74bd8","name":"","func":"var off = msg.payload[0].oneoff_off ;\nmsg.payload = off ;\nreturn msg;","outputs":1,"noerr":0,"x":410,"y":2280,"wires":[["83b240e5.f9216"]]},{"id":"7c1f0dc1.da8cd4","type":"inject","z":"9b0017f2.d74bd8","name":"1 hour ","topic":"SELECT `oneoff_off`FROM `schedule` WHERE `ID` = 0","payload":"","payloadType":"date","repeat":"3600","crontab":"","once":true,"onceDelay":0.1,"x":160,"y":2280,"wires":[["ef0e6a9a.f5f2d8"]]},{"id":"355d89fe.d4ad26","type":"function","z":"9b0017f2.d74bd8","name":"Time convert","func":" msgTemp = msg.payload;\n time = msgTemp / 1000;\n // calculates hour from seconds input\n h = Math.floor(time / 3600); \n // calculates minutes from remainder \n m = Math.floor(time % 3600 / 60); \n // ontime formatted for Schedex standards\n ontime = ('0' + h).slice(-2) + \":\" + ('0' + m).slice(-2);\n //setting ontime\nvar sqlstart = \"UPDATE `schedule` SET `oneoff_off`='\"\nvar sqlend = \"' WHERE `ID` = '0'\"\n msg.topic = sqlstart + ontime +sqlend;\n //setting onpayload\n global.set(\"oneofftime\", ontime);\n msg.payload = ontime;\n return msg;","outputs":1,"noerr":0,"x":750,"y":2280,"wires":[["4fdd6563.685d6c","905b7717.9b8a58"]]},{"id":"4fdd6563.685d6c","type":"link out","z":"9b0017f2.d74bd8","name":"","links":["8927a47d.9e4468"],"x":915,"y":2360,"wires":[]},{"id":"3fa1d099.a3e7c","type":"ui_group","z":"","name":"Espresso","tab":"84da1155.5e744","order":2,"disp":true,"width":"6","collapse":false},{"id":"9c584dac.bb0a6","type":"MySQLdatabase","z":"","host":"127.0.0.1","port":"3306","db":"coffee","tz":""},{"id":"84da1155.5e744","type":"ui_tab","z":"","name":"Kitchen","icon":"dashboard","order":5,"disabled":false,"hidden":false}]
```
---
### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [4 August 2019 22:21 UTC](https://discourse.nodered.org/t/ui-button-with-dynamic-topic-based-on-state/14003/2 "2019-08-04T22:21:19Z")
You might find the `template` node useful.
E.g.
```auto
UPDATE schedule SET weekend_off = {{payload}} WHERE ID = '{{flow.my_id}}'
```
You can access msg, flow and global variables. Read the help info on the side bar