User global environment variables are new, since v3.1 Using environment variables : Node-RED Version 3.1 released : Node-RED What I want to know is if, for example, a flow global variable can be set based on a user global variable? And if so, what is the grammar for doing so?

Hi, welcome to the forum. Unfortunately your question is not making a whole lot of sense (to me). Perhaps some annotated screenshots would help me understand what you are attempting to do (and perhaps there is a better way)

Sure, Suppose you have set a bunch of user level global variables. [image] I also have some flow(tab) level global variables: [image] In the two images the variables are duplicated. Is there a way to use the user level variables to provide values to the global variables defined in a config n…

I currently have a node on each tab defining the same global variables. I assumed the global variables were global to the specific tab. Is that wrong?

I think I am wrong. After reading the documentation it seems like I will end up with indeterminate behaviour. Would the following syntax work? Property : flow. FTH_FTS_URL_MAP Value : str. ${FTH_FTS_URL}

[image] phreed: [image] What node is ↑ this? [image] phreed: Something like: Property : global. FTH_FTS_URL_MAP Value : str. ${FTH_FTS_URL} you can use ENV VARs in most fields using ${ENV_VAR_NAME} but they are not re-writtable is thats what you are asking? you can also u…

The node "Edit config node" is this one, a config node: [image] I will watch the videos and read the link you sent.

that is NOT a node-red node. It is a contib / add in node. thats partly why i was confused by your questions. Typically, if you want to use an ENV VAR, you select Env from the drop down OR, if its got an Env dropdown, you use $(ENV_VAR_NAME) This node (whatever it is) was likely added to simplify…

I have been able to programmatically load flows in ansible with: uri: url: "http://{{ noderedserver_ipv4 }}:{{ noderedserver_port }}/flow" method: POST headers: Content-Type: application/json Node-RED-API-Version: v1 Node-RED-Deployment-Type: fu…

[image] phreed: What is the recommended way to initialize the global variables? Possibly the reload option ? (for memory based context) Failing that, include a flow with a callable endpoint http-in -> function (iterate and reset context) -> http-response

Constructing flow, subflow, and group global variables from user global variables

General

phreed 11 October 2024 13:16 2

I am asking the question because:

Changes to how Environment Variables are evaluated

"Because of the need to make JSONata fully asynchronous in the future,
we’ve changed how the env var evaluation is done -
their values are now all generated when the flows start and not re-evaluated again."

Topic		Replies	Views
[Proposal] Global Environment Variable Core Development	7	494	25 July 2022
Global environment vars accessible in various flows General	2	225	27 July 2022
Env variable at runtime? General	6	239	5 August 2023
Subflow environment variables General	3	287	29 May 2023
Request ENV variables to also be shown in the context menu Feature Requests	5	257	4 April 2023

Constructing flow, subflow, and group global variables from user global variables

Changes to how Environment Variables are evaluated

Related topics