Error: ER_INVALID_JSON_TEXT: Invalid JSON text: "Invalid value." at position 1 in value for column '._data'. IN NODE JS - mysql

Question

I want to insert JOSN data/object into mysql using stored procedure using node js. First of all I know there are some similar question out there but I tried them and but still didn't get the result.
This is the first time I am using stored procedure and node js, So I have table name test_data
test_data
CREATE TABLE `test_data` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`name` VARCHAR(255) NULL DEFAULT NULL,
`address` VARCHAR(255) NULL DEFAULT NULL,
`city` VARCHAR(255) NULL DEFAULT NULL,
PRIMARY KEY (`id`)
)
COLLATE='latin1_swedish_ci'
ENGINE=InnoDB
AUTO_INCREMENT=2
;
This is stored procedure insert_data:
insert_data
CREATE DEFINER=`root`#`localhost` PROCEDURE `insert_data`(
IN `_data` JSON
)
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
BEGIN
declare p_name varchar(255) default null;
declare p_address varchar(255) default null;
declare p_city varchar(255) default null;
set p_name= json_unquote(json_extract(_data, '$.name'));
set p_address= json_unquote(json_extract(_data, '$.address'));
set p_city= json_unquote(json_extract(_data, '$.city'));
insert into test_data(name, address, city) values(p_name, p_address, p_city);
END
here is my node js code :
const con = require('./db/connection');
const _data = {
"name": "Ironman",
"address": "ani#gamil.com",
"city": "bhilai"
}
const sql = "CALL insert_data('"+_data +"')"
con.query(sql, _data,(error, result) => {
if(error){
return console.log("There is error in the query: " + error)
}
console.log(result)
})
ERROR
There is error in the query: Error: ER_INVALID_JSON_TEXT: Invalid JSON text: "Invalid value." at position 1 in value for column '._data'.
please help me out here, what am i doing wrong ?
Thanks

Answer 1

It seems to me that you are not actually passing a JSON value?
const _data = {
"name": "Ironman",
"address": "ani#gamil.com",
"city": "bhilai"
};
The above is a Javascript object, not its JSON representation. So here
const sql = "CALL insert_data('"+_data +"')"
the actual value of sql will be "CALL insert_data('[object Object]')" which is in fact not valid. Try dumping sql to console to verify that this is indeed the case.
Try with:
const sql = "CALL insert_data('"+ JSON.stringify(_data) +"')"