Reference > Functions reference > JSON functions > JSONListKeys

JSONListKeys

Lists the object names (keys) or array indexes in JSON data for an element specified by an object name, an array index, or a path.

Format

JSONListKeys ( json ; keyOrIndexOrPath )

Parameters

json - any text expression or field that contains a JSON object or array.

keyOrIndexOrPath - any text expression or field that specifies a JSON object name (key), an array index, or a path. See Working with the JSON functions.

Data type returned

text

Originated in

FileMaker Pro 16.0

Notes

•Each returned value, except the last, ends with a carriage return.

•This function is not supported in runtime solutions and returns "?".

Example 1

Gets the names of all objects at the root of the JSON object.

JSONListKeys( "{ \"a\" : 11, \"b\" : 22, \"c\" : 33 }", "" ) returns a¶b¶c.

Example 2

From the Example JSON data stored in the $$JSON variable, gets the indexes of all elements in the array in the "product" object.

JSONListKeys ( $$JSON ; "bakery.product" ) returns 0¶1¶2.

Example 3

From the Example JSON data stored in the $$JSON variable, gets the keys of all elements in the first "product" object in the array.

JSONListKeys ( $$JSON ; "bakery.product[0]" ) returns category¶id¶name¶price¶special¶stock.