Tengo un código como este-
async function fetchData() { xlData.map(async (student, id) => { const studentExist = await User.findOne({ email: student.email, }); if (studentExist) { let includesStudent = await Class.findOne({ student: { $in: [studentExist._id] }, }); if (!includesStudent) { studentsIds.push(studentExist._id); } } }); return studentsIds; } const finalData: any[] = await Promise.all(fetchData()); console.log("final data", finalData);Estoy recibiendo un error de la siguiente manera:
No overload matches this call. Overload 1 of 2, '(values: readonly unknown[] | []): Promise<unknown[] | []>', gave the following error. Argument of type 'Promise<any[]>' is not assignable to parameter of type 'readonly unknown[] | []'. Type 'Promise<any[]>' is not assignable to type '[]'. Overload 2 of 2, '(values: Iterable<any>): Promise<any[]>', gave the following error. Argument of type 'Promise<any[]>' is not assignable to parameter of type 'Iterable<any>'. Property '[Symbol.iterator]' is missing in type 'Promise<any[]>' but required in type 'Iterable<any>'.ts(2769)¿Cómo resolver esto?
La función no está devolviendo una promesa,
El primer enfoque no depende de la matriz studentIds.
const fetchData = () => { const promises = xlData.map(async (student, id) => { const studentExist = await User.findOne({ email: student.email, }); if (studentExist) { let includesStudent = await Class.findOne({ student: { $in: [studentExist._id] }, }); if (!includesStudent) { return studentExist._id; } } }); return promises; }; const result: any[] = await Promise.all(fetchData()); //remove undefined const students = result.filter((student) => Boolean(student)); console.log("final data", students);O
async function fetchData() { await Promise.all( xlData.map(async (student, id) => { const studentExist = await User.findOne({ email: student.email, }); if (studentExist) { let includesStudent = await Class.findOne({ student: { $in: [studentExist._id] }, }); if (!includesStudent) { studentsIds.push(studentExist._id); } } }) ); return studentsIds; }