JASONata $flowcontext can't get it working

General
1

Hi guys, 'm not sure if I am doing something wrong, but I can't get this simple flow to work:

[{"id":"c1d0123d.36c56","type":"inject","z":"e4a2b71d.443e78","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":400,"y":660,"wires":[["980deed6.2c72a8"]]},{"id":"7a7a6264.84f094","type":"debug","z":"e4a2b71d.443e78","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":860,"y":680,"wires":[]},{"id":"980deed6.2c72a8","type":"change","z":"e4a2b71d.443e78","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"$flowcontext(\"calibV0\")\t","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":620,"y":660,"wires":[["7a7a6264.84f094"]]}]

The error received: Invalid JSONata expression: Attempted to invoke a non-function

Node.js version: Node v12.19.0
NR version: 1.2.3
OS: Raspbian 10 (buster)

Please accept my apology if this is not the right place and/or the q is too trivial :flushed:
Thank you,
N.

2

Hi @nonix - welcome to the forum

No need to apologise - this is the right place to ask questions and there's nothing too trivial to ask when you're stuck on something.

The function you want is $flowContext not $flowcontext.

3

Hi, thank you for super fast reply, did not realized it is case sensitive. :blush:
However, now there is no error msg, but nothing get set anyway. e.g. it sends an empty object.

[{"id":"aaa6fba3.dd4dc","type":"inject","z":"e4a2b71d.443e78","name":"LiPo calib. Voltage/A0","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"0.00496173469387755102040816326531","payloadType":"num","x":420,"y":640,"wires":[["e7d50e70.2b49e"]]},{"id":"e7d50e70.2b49e","type":"change","z":"e4a2b71d.443e78","name":"","rules":[{"t":"set","p":"cailbV0","pt":"flow","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":660,"y":640,"wires":[[]]},{"id":"88b6d266.404a48","type":"change","z":"e4a2b71d.443e78","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"$flowContext(\"calibV0\",\"memory\")","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":570,"y":700,"wires":[["95689049.42786"]]},{"id":"95689049.42786","type":"debug","z":"e4a2b71d.443e78","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":770,"y":700,"wires":[]},{"id":"322d2a26.64ba0e","type":"inject","z":"e4a2b71d.443e78","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"true","payloadType":"bool","x":360,"y":700,"wires":[["88b6d266.404a48"]]}]

I have also added the creation of the flow.context variable into this example.

Note: Not sure if any value, but need to say I have upgraded the NR from an older version (don't remember the previous ver. but about 1/2 year old)

Thank you for helping,
N.

4

You have a typo
calibV0
cailbV0

5

Well, what can I say ... thank you very much for finding my typo.

I am so embarrassed :face_with_head_bandage:

N.

6

Hi. Welcome to the forum.

JavaScript, JSON & JSONata are all case sensitive.

7

Don't fret to much we have all been there.

8

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