Trying to output log/errors to table in web ui

Dashboard
1

I'm trying to output the node red logs into a table for easy debuging on my phone.... The problem is str needs to be a string of json, not the type [object Object] which it keeps giving me. Ive tried converting to string multiple ways with no luck.

I have the following function:

let logs = flow.get('logs') || []

var str = msg.payload.message

// prepare the row (keep other columns as-is)
let row = [
    //msg.payload.time || '',
    //msg.payload.type || '',
    msg.payload.source,
    str,
]

// debug: this needs to print a string! but it returns an object
node.error(str)

logs.push(row)

// cap at 20 rows
if (logs.length > 20) logs.shift()
flow.set('logs', logs)

msg.payload = logs
return msg
2

Pass the output of your function through a JSON node

Alternatively...

msg.payload = JSON.stringify(logs)
3

Unfortunately for both, that converts the string to "[object Object]" instead of the contents of the object.

4

How are you trying to display it? Are you using UIBUILDER, Dashboard 2 or Dashboard 1?

5

I'm using dashboard 2 with a table widget. Also output node.error displays the same format.

6

Where does msg.payload.message come from? How is it constructed?

7

I'm using a catch node to catch errors. Passing them to this function. Then this function outputs to a table node.

Catch - function - table

Cheers

8

If you connect a debug node to the catch, showing the complete message object, what does it contain?

9

It contains the following object:

{"battery":100,"device":{"applicationVersion":147,"dateCode":"22092025","friendlyName":"Front Motion","hardwareVersion":1,"ieeeAddr":"0xa4c1386709fdfac3","manufacturerID":4742,"manufacturerName":"_TZE200_rhgsbacq","model":"ZG-204ZV","networkAddress":43435,"powerSource":"Battery","softwareBuildID":"0122092025","stackVersion":2,"type":"EndDevice","zclVersion":3},"fading_time":30,"humidity":70,"humidity_calibration":0,"illuminance":745,"illuminance_interval":1,"indicator":"OFF","linkquality":51,"motion_detection_sensitivity":2,"presence":false,"temperature":17.8,"temperature_calibration":0,"temperature_unit":"celsius"}
10

That data does not include a msg.payload, so no msg.payload.message.

Indeed, it can't be that you only shared the payload: no msg.message either

11

What contains that object? Did you set the debug node to Output Complete Message as requested?

12

argh so silly! that was it.... msg.payload instead of msg.payload.message

Thanks guys

13

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