MySQL and LUA not triggering correctly or code incorrect - mysql

Question

I am struggling to trigger a server event succesfully on my FiveM server. Or maybe it gets triggered but the server event is incorrect. However I do not get any errors and I don't know what to fix...
Server-side
RegisterServerEvent('carwash:pay')
AddEventHandler('carwash:pay', function()
local _source = source
local price = 20
local identifier = GetPlayerIdentifier(_source)
MySQL.Async.fetchAll("SELECT * FROM economy WHERE identifier = #identifier", {
['#identifier'] = identifier
}, function(result)
if result >= 20 then
MySQL.Async.execute('UPDATE economy SET cash = cash - #price WHERE identifier = #identifier',
{ ['#identifier'] = identifier, ['#price'] = price }
)
end
end)
end)
Client-Side
TriggerServerEvent('carwash:pay')

Answer 1

I don't know if you're still working on it or figured it out but for those who have the same problem, I'm gonna answer this.
The problem here is that you are comparing a whole table (SELECT * FROM economy...) to the number 20.
Besides, a "fetchAll" will allways output an array, so, in order to acces the column cash from the table economy, you need to use "result[1].cash".
Then, sometimes the "error" is not a syntaxe one, you need to put some "print()" here and there to understand where it stops, changes or just check if it works.
e.g. :
RegisterServerEvent('carwash:pay')
AddEventHandler('carwash:pay', function()
local _source = source
local price = 20
local identifier = GetPlayerIdentifier(_source)
MySQL.Async.fetchAll("SELECT * FROM economy WHERE identifier = #identifier", {['#identifier'] = identifier},
function(result)
-- CHECK WHAT IT RESULT
print(result)
if result >= 20 then
MySQL.Async.execute('UPDATE economy SET cash = cash - #price WHERE identifier = #identifier', { ['#identifier'] = identifier, ['#price'] = price })
end
end)
end)