Returns the number of matches to a query in a JSON object.

C Language

int lr_json_find( "JsonObject=<parameter name>", "Value or ValueParam =<value>", "QueryString=<query>", ["SelectAll=<Yes|No>",] ["IgnoreCase=<Yes|No>",] ["UseRegExp=<Yes|No>",] ["NotFound=<Error|Continue>",] LAST );

ExampleParameter Functions


JsonObjectThe name of the parameter that stores the handle of the JSON object created by lr_eval_json.
QueryStringThe JSON query
ValueThe value to find.
ValueParamThe name of a parameter containing the value to find
UseRegExpOptional: If Yes, the Value is a regular expression. Default is No.
SelectAllOptional: If Yes, returns the total number of matches. If No, stops after first match. Default is No.
IgnoreCaseOptional: If Yes, ignore case. Default is No.

Optional. One of:

  • Error - Script run is aborted and error message is sent. (Default)
  • Continue - Script run continues. A warning message is sent.
LAST Required marker for the end of the argument list.

lr_json_find runs the query on the JSON object and returns the number of matches.

This function is not recorded. You can insert it manually into your script.

Return Values

The number of matches. If SelectAll = No, the number of matches is 0 or 1.


Parameterization is not applicable to this function.


This script shows the usage of lr_json_find.

	int i = 0;
	// See File: store.json
	i = lr_eval_json("Buffer/File=store.json", 
	                 "JsonObject=f_json_obj", LAST);
	// Multi match with SelectAll=No
	i = lr_json_find("JsonObject=f_json_obj",
	if (i != 1)
		lr_error_message("lr_json_find should return %d, but returns %d", 1, i);
	// Multi match with SelectAll=Yes
	i = lr_json_find("JsonObject=f_json_obj",
	if (i != 3)
		lr_error_message("lr_json_find should return %d, but returns %d", 1, i);
	// Use RegExp
	lr_save_string("$..books[?(@.price>10)].author", "f_path_author");
	i = lr_json_find("JsonObject=f_json_obj",
	if (i != 1)
		lr_error_message("lr_json_find should return %d, but returns %d", 1, i);
	return 0;

TestFind.c(10): Notify: Saving Parameter "d_result = {"store":{"name":"Black Books","address":"No 20, J Rd","books":[{"category":"reference","author":"Nigel Rees","title":"Sayings of the Century","price":8.95},{"category":"fiction","author":"Evelyn Waugh","title":"Sword of Honour","price":12.99},{"category":"fiction","author":"Herman Melville","title":"Moby Dick","isbn":"0-553-21311-3","price":8.99},{"category":"fiction","author":"J. R. R. Tolkien","title":"The Lord of the Rings","isbn":"0-395-19395-8","price":22.99}]}}".

TestFind.c(10): lr_json_stringify succeed

TestFind.c(15): Error: No matches were found.

TestFind.c(15): Error: lr_json_find failed