How To Extract JSon Values From NodeRed JSon Object

In  this Post I will Step Through  on How to Extract JSON Value from Node Red JSon Object.

We will Use the below JSon object as an Example  ,

In this JSon Object we will Extract the value “truck ”  and the “political” value .

Before we deep dive into Setting up the node , Let go through on how to Read the JSON Object

“volume” is the second key Value of the Json Object ,and “volume” is package as an Array .  The Array length of  the “volume” Array  is  equal to 6 . The First Array of “volume ”  which is also an Array has an Array Length of  6.

To get  the “truck” Value.  We understand that  “truck” reside inside  the the First index of the  Array , and the Array reside  in index 0 of the “volume” Array.

To get the “political” Value . We understand  “political is the third key of the JSon Object

Nodes that you will Need

1. Inject Node
2. JSon convert Node
3. function Node
4. 2 Debug Node to output “truck ” and “political” Value

Build the Sample Node

Step 1

Drag out an inject Node and Configure as below, Click the  ”  … ” and Paste the Sample JSON into the text Area

Step 2

Drag out the JSon Objects Node and Configure as below

Step 3

Drag Out the Function Node  Click the Setup Tab and Configure as Below . When Done Click the  On Message Tab and  paste the Code below into the Text Area.

Step 4

Drag Out 2 Debug node  and Provide a logical name  . In my case i name it  ” Extract Truck Word ” and  ” Political Value ”

Step 5

Joint all the Nodes  and Click Deploy . Observe the Results

Results

Check out  Multiple Output From Node Red