Change msg.payload to msg.payload.ANYNAME

General
1

Hello,

I'm new on node red and well, messages are quite hard for me to understand... I tried https://nodered.org/docs/user-guide/messages but I can't get my issue resolved...

HOW can I pass a number within msg.payload on to a different message e.g. msg.payload.xyz? Could not do it with set to msg.payload.xyz .....

I am trying to send data to a google form, that will send it to a google spreadsheet. To do so, I need to send a message that contains a number (measurement value) with the name msg.payload.xyz

Thanks!
toby

2

Welcome to the forum. Have a look at the change node!

3

I had already tried that within the change node without success...

4

Look thru this

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So 1st step is to save the old msg.payload somewhere
Then delete it
Then set msg.payload.xyz to the old payload
Then to tidy up - (but not necessary) delete our temp copy of the payload

The basic issue is that msg.payload can be swapped/set to numbers/strings at will but you can't then change to using it as an object to hold other objects/values.

It has to be deleted and then re-created as an object

Prob not strickly using the correct terms here but this is the way I got my head around the issue :slight_smile:

5

or use the move option instead.... which does the save/delete/replace for you.

1 Like
6

That was going to be lesson 2 once the OP has got their head around the concept :slight_smile:

7

Thanks a lot!! this solved my issue! :smiley: :smiley:
Also tried it with move but did not work out straight away. Will try it again later but as for now, I leave it like that - never change a working system or so :smiley:
toby

8

It should work and its a lot more compact

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9

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