How to display an understandable error from sqlite expo? - sql

Question

I'm creating an app in React-native and I use expo-SQLite for the database.
Unfortunately, I have a problem in my db request and I don't understand the error sent from sqlite.
Could you please help me ?
This is my code:
db.transaction(tx => {
tx.executeSql(
`create table if not exists Espace (id_espace integer primary key autoincrement,name text not null unique)`, [], (tx, results) => {
console.log("Create table Espace");
}
);
});
db.transaction(tx => {
tx.executeSql(
`INSERT INTO Indicator (title, display_order, type, hidden, graphic_type, id_espace) VALUES ('?','?','?','?','?','?')`, [title,display_order,type, hidden, graphic_type, espace], (_, {rows}) =>{
console.log('Put Indicator: ' + title + type + display_order + hidden + graphic_type + espace);
},
(error)=>{
console.log(error);
return true;
}
);
});
When I try to create an indicator my console display this error from sqlite:
WebSQLTransaction {
"_complete": false,
"_error": null,
"_running": true,
"_runningTimeout": false,
"_sqlQueue": Queue {
"first": undefined,
"last": undefined,
"length": 0,
},
"_websqlDatabase": WebSQLDatabase {
"_currentTask": TransactionTask {
"errorCallback": [Function anonymous],
"readOnly": false,
"successCallback": [Function anonymous],
"txnCallback": [Function anonymous],
},
"_db": SQLiteDatabase {
"_closed": false,
"_name": "diplea.db",
},
"_running": true,
"_txnQueue": Queue {
"first": Object {
"item": TransactionTask {
"errorCallback": [Function anonymous],
"readOnly": false,
"successCallback": [Function anonymous],
"txnCallback": [Function anonymous],
},
},
"last": Object {
"item": TransactionTask {
"errorCallback": [Function anonymous],
"readOnly": false,
"successCallback": [Function anonymous],
"txnCallback": [Function anonymous],
},
},
"length": 1,
},
"exec": [Function anonymous],
"version": "1.0",
}
It means nothing to me ... could you tell me a way to understand it? Or maybe what is wrong in my code ...
Thanks in advance !

Answer 1

What you are seeing is the Transaction itself, not the error.
According to Expo's SQLite docs, the error callback of Transaction.executeSql takes two arguments:
error (function) -- Called if an error occured executing this particular query in the transaction. Takes two parameters: the transaction itself, and the error object.
You want your error callback to look like this:
tx.executeSql(
...,
...,
...,
(_, error) => {
console.log(error);
return true;
}
);