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This commit is contained in:
Wolfgang Hottgenroth
2021-01-13 15:23:04 +01:00
parent 845f3fd400
commit da51077869
2 changed files with 45 additions and 16 deletions
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37
tools/app/promise-learn/build/index.js
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@ -15,17 +15,21 @@ class DbHandle {
database: 'heroes'
});
}
get(stmt) {
async getHeroes() {
var _a, _b;
return (_b = (_a = this._conn) === null || _a === void 0 ? void 0 : _a.query(stmt)) !== null && _b !== void 0 ? _b : Promise.reject(new Error('Connection not ready 1'));
const result = (_b = await ((_a = this._conn) === null || _a === void 0 ? void 0 : _a.query("SELECT id, name FROM hero"))) !== null && _b !== void 0 ? _b : Promise.reject(new Error('Connection not ready 1'));
return result.map((row) => {
var _a;
return { id: row.id, name: (_a = row.name) !== null && _a !== void 0 ? _a : 'unknown' };
});
}
close() {
var _a, _b;
return (_b = (_a = this._conn) === null || _a === void 0 ? void 0 : _a.end()) !== null && _b !== void 0 ? _b : Promise.reject(new Error('Connection not ready 2'));
}
}
const dbHandle = new DbHandle();
/*
const dbHandle = new DbHandle()
dbHandle.connect()
.then(() => dbHandle.get("SELECT * FROM hero"))
.then((result) => {
@ -34,14 +38,27 @@ dbHandle.connect()
})
.catch((err) => {
console.log(err)
}
})
*/
async function exec() {
const dbHandle = new DbHandle();
try {
await dbHandle.connect();
const heroes = await dbHandle.getHeroes();
console.log(heroes);
}
finally {
await dbHandle.close();
}
}
exec().catch((err) => console.log(err.message));
/*
dbHandle.get("SELECT * FROM hero")
.then((result) => {
console.log(result);
return dbHandle.close();
})
console.log(result)
return dbHandle.close()
})
.catch((err) => {
console.log(err.message);
});
console.log(err.message)
})
*/