Local Context Storage not working

General
1

Hey there,

before starting, I'd like to give you some infos about my setup.

Node-RED v4.0.8 running under Docker
mounted local folder to /tmp in container.

I wanted to activated local content storage to be able to store context in local filesystem.
The docs are pretty straight forward.
I added this to my settings.js:

contextStorage: {
    default: {
        module: "memory"
    },
    file: {
        module: "localfilesystem",
        config: {
            dir: "/tmp"
        }
    }
},

So writing seems to work, right?
My problem is, I cannot retrieve the stored files.

const average = msg.payload || 0; 

// Wert im Flow-Kontext aktualisieren
flow.set("LastPvPowerAverage", average);

// Wert im Datei-Kontext speichern
context.set("LastPvPowerAverage", average, "file");

//node.warn(`Gespeichert: ${average}`);
return msg;

With this function, I can store the input of the function node. I verified this on the filesystem.

When trying to retrieve it with this:

const lastAverage = context.get("LastPvPowerAverage", "file"); // Versuche, den Wert aus der Datei zu laden
if (lastAverage !== undefined) {
    node.warn(`Erfolgreich abgerufen: ${lastAverage}`);
    flow.set("LastPvPowerAverage", lastAverage); // In den Flow-Kontext speichern
    node.status({ fill: "blue", shape: "ring", text: `Initialisiert: ${lastAverage}` });
} else {
    node.warn("Kein gespeicherter Wert gefunden!");
    flow.set("LastPvPowerAverage", 0); // Standardwert setzen
    node.status({ fill: "red", shape: "ring", text: "Kein Wert gespeichert" });
}
return null;

I dont get anything at all.

Any help Is appreciated on troubleshooting this situation.

2

Is that 2nd code segment in the same function node as the 1st? If not, then you should be using flow or global instead of context.

3

Oh hell, you dont not how much I appreciate your help!
As it were two different function nodes, your solution helped me out!
thanks so much!

1 Like
4

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