Hello everyone, I have the following msg.payload object output: [image] where in the future, there will be numerous objects inside (not just 1063960). I would like to iterate across the objects and access the ID field in each to check for a match to an ID I want. However, the problem is that the…

Thank you all so much for the help!! I replaced the forEach with a for in as suggested and it seems to be working perfectly now as far as I can tell. I will leave the final solution here in case this is needed by someone in the future: for (var key in msg.payload){ if (msg.payload[key].ID == "…

You can simply walk the object properties. Here is one way: Object.keys(msg.payload).forEach( key => { if ( msg.payload[key].id === '1063960' ) { .... } })

Oh thank you! That seems like it will do exactly what I need, but for some reason I am getting the error ""TypeError: Cannot read property 'ID' of undefined"" This is the code in my function now: Object.keys(msg.payload).forEach( key => { if (msg.payload[key].ID == "1063960" ) { glob…

Add a node.warn(Object.keys(msg.payload)) statement above the forEach line to see what you are actually getting there.

I placed that as instructed and received this: [image] Then, I placed a node.warn(msg.payload[key]) right before the if and received these 2 outputs: [image] After that comes the error

[image] Huda: Object.keys(msg.payload).forEach( key => { if (msg.payload[key].ID == "1063960" ) { global.gender = msg.payload[key].Gender msg.payload = global.gender; // <- you are changing the msg.payload while iterating it return msg; } }) That way the next…

That is what I thought, because msg.payload is being overwritten, but there is also a return msg there which means that it should have returned immediately following inspecting the first element, so it should never have got to the second element.

NO.You can't break the forEach https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach

So you are looking for single match and send out the value of Gender property of that found object. var needle = "1234" var o = Object.keys(msg.payload).find(e => msg.payload[e].ID == needle) msg.payload = msg.payload[o].Gender return msg; But if not found var needle = 1234 var o = Object.keys(m…

Yes exactly, thank you for the alternative method, this also seems to work great! (is there a way to mark 2 answers as the solution to a thread?) I'm wondering what the difference between the one you first posted (using e => e) and the one here with msg.payload? they both seemed to work for me

Accessing msg.payload Object of Objects with dynamic inner object names

General

Colin 16 March 2021 21:33 9

Oh you are right, it is a forEach not a for in. I was concentrating on what was inside instead of what was doing the iteration.
So yes, you are correct, it is the fact that msg.payload is being overwritten that is the problem.

1 Like

Topic		Replies	Views
How to select an Object in payload General	7	2217	8 May 2020
Using a for loop for dynamic objects General	14	1440	3 December 2021
Read and test the value of a property inside an object that is inside another object General	7	2113	5 October 2019
How to access msg object per position Dashboard	16	1140	16 September 2021
Selecting an object from within an object General	8	1485	6 January 2022

Accessing msg.payload Object of Objects with dynamic inner object names

Related topics