JSONata not evaluated in read/write file nodes in the context of Node-RED 3.1.0

[napsi]

Current Behavior

A flow with write file and read file nodes using a $join(['a','b','c']) JSONata expression for the filename, will use that expression string verbatim as filename, rather than evaluating it to 'abc'.

This happens on docker image flowforge/node-red:1.13.2-3.1.0, while on flowforge/node-red:1.13.2 the expression is evaluated.

It would seem related to:

• Fix JSONata in file nodes node-red/node-red#4246
• JSONata not evaluated in write file node in 3.1.0 beta3 node-red/node-red-nodes#1011

Expected Behavior

The nodes should evaluate the expression and use the filename 'abc'.

Steps To Reproduce

Import and trigger this flow on a flowforge/node-red:1.13.2-3.1.0 instance.

[{"id":"9533c737d8b1bf9c","type":"tab","label":"JSONata filename bug","disabled":false,"info":"","env":[]},{"id":"314d9f0b4e0ac1ed","type":"debug","z":"9533c737d8b1bf9c","name":"debug write","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":550,"y":340,"wires":[]},{"id":"45965d8ef17a431e","type":"file","z":"9533c737d8b1bf9c","name":"","filename":"$join(['a','b','c'])","filenameType":"jsonata","appendNewline":true,"createDir":true,"overwriteFile":"true","encoding":"none","x":380,"y":340,"wires":[["314d9f0b4e0ac1ed","4e1b46a0d777dcf3"]]},{"id":"3214f4b4233a57c2","type":"inject","z":"9533c737d8b1bf9c","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":220,"y":340,"wires":[["45965d8ef17a431e"]]},{"id":"4e1b46a0d777dcf3","type":"file in","z":"9533c737d8b1bf9c","name":"","filename":"$join(['a','b','c'])","filenameType":"jsonata","format":"utf8","chunk":false,"sendError":false,"encoding":"none","allProps":false,"x":540,"y":400,"wires":[["c5da2eb62b8327f4"]]},{"id":"c5da2eb62b8327f4","type":"debug","z":"9533c737d8b1bf9c","name":"debug read","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":710,"y":400,"wires":[]}]

Environment

• FlowFuse version: 1.13.2
• FF Node-RED: flowforge/node-red:1.13.2-3.1.0@sha256:a82ebd2d5d38edb356f1ef12ccc36b568ce37ac1a6401dd2529a549d86950fa2
• Platform/OS: docker, linux/amd64