No data on second function output

General
1 
var msg2 = [{payload:"",filename:""}];

msg2.filename = "test";
msg2.payload = "test2";

msg.payload = "test3";

return [msg,msg2];

Though I fill msg2.filename and msg2.payload with data, the second debug output shows only the empty strings from line 1!??

complete flow to test:

[
    {
        "id": "e82841526f31da38",
        "type": "function",
        "z": "ada67f26f66765ce",
        "name": "",
        "func": "var msg2 = [{payload:\"\",filename:\"\"}];\n\nmsg2.filename = \"test\";\nmsg2.payload = \"test2\";\n\nmsg.payload = \"test3\";\n\nreturn [msg,msg2];\n",
        "outputs": 2,
        "timeout": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 420,
        "y": 200,
        "wires": [
            [
                "5240e61ec7f320bf"
            ],
            [
                "ae5614bcead71a36"
            ]
        ]
    },
    {
        "id": "875462fc390b6934",
        "type": "inject",
        "z": "ada67f26f66765ce",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 220,
        "y": 200,
        "wires": [
            [
                "e82841526f31da38"
            ]
        ]
    },
    {
        "id": "5240e61ec7f320bf",
        "type": "debug",
        "z": "ada67f26f66765ce",
        "name": "debug 35",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "statusVal": "",
        "statusType": "auto",
        "x": 620,
        "y": 160,
        "wires": []
    },
    {
        "id": "ae5614bcead71a36",
        "type": "debug",
        "z": "ada67f26f66765ce",
        "name": "debug 36",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "statusVal": "",
        "statusType": "auto",
        "x": 620,
        "y": 240,
        "wires": []
    }
]
2

No need an array for the second output.

var msg2 = {payload:"test2",filename:"test"};
msg.payload = "test3";

return [msg,msg2];
1 Like
3

The above demo is simple, but I want to change both of the values during the code, so I cannot set them at the beginning!?
But it is valid to change the values during the function code, isn't it?

4

You can change the values as many times as you desire. The only time it matters is when you return them.

5

I did this many times before. But then why does my debug 36 not return the values above??
BTW: I test it on Node-RED 4.0.2. My Smart-home Node-RED is still at 3.1.9, but I can reproduce the same effect there.

6

Have you taken the square brackets off? It should be
var msg2 = {payload:"",filename:""};

You should use let rather than var, but that is not what is causing the problem.

7

Thanks, @Colin ! That was the error!!

8

@GogoVega did point that out in his first post. It is that one you should mark as the solution.

1 Like
9

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