Waterfall Node.js of Cannot read property 'Symbol(Symbol.toStringTag)' of undefined - node.js

Question

I am writing async.waterfall in my biz. See code below. When I run the code, I got 'Cannot read property 'Symbol(Symbol.toStringTag)' of undefined', I do think I pass the right param.
function checkDeleteStatus(id) {
const idType = id instanceof Array;
const whereparam = idType ? [[id]] : [id];
let sql = `select status from ${bookingSheet} where id ${idType ? 'in' : '=' } ?`;
func.connPool(sql, whereparam, (err,rows,fields) => {
if(err == null){
let passTag = true;
for(var i = 0; i < rows.length; i++) {
let row = rows[i];
if (row.status == 0) {
passTag = false;
break;
}
}
return (callback)=>{
passTag ? callback(null, id) : callback('No', null);
}
} else {
return (callback)=>{
callback(err, null);
}
}
});
}
function deleteBooking(data, callback) {
let sql = `delete sql`;
func.connPool(sql, [data], (err,rows,fields) => {
if(err==null){
callback(null, data)
} else {
callback(err, null)
}
});
}
......
async.waterfall([checkDeleteStatus(id), deleteBooking], (err, result) => {
if (err) {
res.json({ code: 400, message: err.toString() })
} else {
res.json({ code: 200, message: "Query Successfully", data: result })
}
})
Interesting thing is, when I try to write below for checkDeleteStatus, it will run correctly. Is that mean, return part goes before sql part? I am new for using node.js waterfall, sorry for this kind of dumb question.
function checkDeleteStatus(id) {
const idType = id instanceof Array;
const whereparam = idType ? [[id]] : [id];
let sql = `select status from ${bookingSheet} `;
return (callback)=>{
callback(null, id);
}
}

Answer 1

I know the resone, the function should write like below. return (callback)=> should expend its range.
function checkDeleteStatus(id) {
return (callback)=>{
const idType = id instanceof Array;
const whereparam = idType ? [[id]] : [id];
let sql = `select status from ${bookingSheet} where id ${idType ? 'in' : '=' } ?`;
func.connPool(sql, whereparam, (err,rows,fields) => {
if(err == null){
let passTag = true;
for(var i = 0; i < rows.length; i++) {
let row = rows[i];
if (row.status == 0) {
passTag = false;
break;
}
}
passTag ? callback(null, id) : callback('No', null);
} else {
callback(err, null);
}
});}
}