In node red suppose my flow is like [1st API call]--------->[2nd API call]--->merge both and display data on dashboard the first node will call API and each time the result will be different and after second call I have to merge both response, so how I can store the first API call response for usi…

In general for simple cases like this you may be better doing them serially.. First api call, then process or move the result to another msg property then pass to second api call. The resulting msg should still have the added property from the first, so you can now do whatever you need to both.

if i use flow variable or global variable to store and pass messages between flows, does each trigger will have different values stored in variable as values will change for each api call or same variable will be updated. I mean if two users are accessing same flow using dashboard and does the vari…

It is a shared space, so a second call will overwrite the first

There is only one flow running, and one set of flow variables... so in general yes unless you are careful events from one browser pointed at the same flow will affect the flow and thus the other dashboard. However there are some extra variables passed back from events that you can use to help separa…

So if you are storing, lets say, a simple value - lets call it "x". Change your variable to be an object and save/read the value as "x[_sessionid]" instead of just "x". As always, you need to give some thought as to the size of all of the things you are keeping in memory. Especially if you are expe…

Be careful of that though - as the sessionid is NOT a userid - and changes EVERY time the browser refreshes... so you may over time build up a load of crud in memory.

Thanks for the reminder Dave. You are, as always right and setting a session cookie would be a lot more reliable.

I have the below flow first i am calling one API and after selection from dropdown i am saving that as msg.controllerid(selection made: S001). After the first selection I am calling another API and fetching the result and feed those data to dropdown for selection, when the second selction made from …

In node-red how to store message for using in flows

General

VIKRAMAS 9 March 2019 09:17 6

So, as I asked in other thread the question about navigating and passing message to another tab with click(How to add slider on map sensor once on click it should do some action), So if I use variables then if two users are simultaneously accessing dashboard, then as i am storing messages in variables the action done by one user in dashboard, will affect another user's dashboard.

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In node-red how to store message for using in flows

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