I end up using a (simple) JSONata expression to append text to existing msg.payloads (e.g when sending tweets out) Is there a none JSONata/JS way of doing this? If not, how about adding Append as an option in the change node (as well as set,change,move,delete)?

The trouble is you then start down the slippery slope of all the various operations possible. If we added append, why not prepend, split, trim, indexOf etc - and that's just for String types. For arrays - push,pop,slice and so on. That may be something to consider, but it risks throwing too many o…

I was only after a LITTLE bit of cream on top........ :slight_smile:

your right, we'd need prepend as well but that's all :slight_smile: [image] knolleary: but it risks throwing too many options in the node. I'm not normally one for pointing out what happens elsewhere to boost my case but.... ...the switch node has a LOT of options :slight_smile: And I see…

It is worth considering, but not by adding one option at a time.

[image] cymplecy: I end up using a (simple) JSONata expression to append text to existing msg.payloads I tried this. I thought I should be able to use a Change node to Set msg.payload to payload & "extra text" but the JSONata window doesn't like it. Using node-red v0.18.7

mm -works for me (in 0.19.1) and it always worked for me in 0.18.7 as well [image]

Sorry, just me being careless, I had JSON instead of J: So given that it is so easy(!) I can't see that it is worth adding a specific Append option.

well... I think one of the the main selling points of Node-RED is NOT having to code to achieve simple (or even quite complex) things hence my request :slight_smile:

JFI - This all came about by me looking thru my change nodes and seeing which ones had JSONata in them and then seeing if I could use @BartButenaers Blocky node instead And I found that quite a few of them were just using JSONata to prepend/append text/flowContext stuff to a payload Simon

There is a pretty simple way to append (or prepend) using a change node with regex: [image] ... as long as you know that ^ means "start of string", and $ means "end of string".

[SUGGESTION] add Append to change node

Core Development

shrickus 18 August 2018 13:53 11

There is a pretty simple way to append (or prepend) using a change node with regex:

... as long as you know that ^ means "start of string", and $ means "end of string".

4 Likes

Topic		Replies	Views
Append to payload message string General	3	16282	8 July 2018
Either dumb question or possible suggestion for the Change node General	5	507	22 January 2022
Insert a string into a change node string? General	18	4817	14 July 2022
Change node and jsonata General	8	2285	18 October 2019
Unexpected behaviour when using jsonata expressions like payload[..][] in change node General	10	587	16 November 2020

[SUGGESTION] add Append to change node

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