jsonSet
New in 7.9.2
This function is used by Ignition's Expression language.
Description​
Takes a JSON friendly string, a path string, and value, and will return a new JSON friendly string with the provided path set to the provided value. This is best used in conjunction with the Derived Tags writeback value.
Syntax​
jsonSet(json, path, value)
Parameters
string json - The JSON string. The string must be in a JSON friendly format.
//The json parameter must be wrapped in {}, and contain a colon between the key and the value.
//Since the parameter passed is a string datatype, the whole parameter must be wrapped in quotes.
"{key:value}"
//You may optionally wrap strings in quotation marks.
"{'key':'value'}"
//You may also nest objects inside of the value, much like you can do with Python dictionaries.
"{keyCollection1:{firstKey:value1, secondKey:value2}, keyCollection2:{firstKey:value1, secondKey:value2}}"string path - The path string.
object value - The replacement for the value at the path.
Results
- string - A JSON friendly string with a new value set at the specified path.
Examples​
Code Snippet
// This example takes a JSON friendly string and sets the provided path to the given value. This would then return the string {'item':{'firstThing':1, 'secondThing':5}}
jsonSet("{'item':{'firstThing':1, 'secondThing':2}}", "item.secondThing", 5)