I'm currently facing an issue with the code snippet below, which is a simplified example:
class QueryArgs {
studentId?: string;
teacherId?: string;
}
class BaseValidator<T> {
protected args: T;
constructor(args: T) {
this.args = args;
}
protected requireTeacher(): void {
if (!this.args.teacherId) {
throw new Error("teacherId required");
}
}
}
class QueryValidator extends BaseValidator<QueryArgs> {
public validateAdmin(): QueryArgs {
this.requireTeacher();
return this.args;
}
}
// Sample implementation mimicking a third-party library
const args: QueryArgs = new QueryArgs();
args.studentId = "XXXX-XXX-XXX";
// Just for demonstration purposes, not actual implementation
const validator = new QueryValidator(args);
const validArgs = validator.validateAdmin();
The error I encounter lies within the BaseValidator class and specifically in the requireTeacher method where this.args.teacherId triggers the message
Property 'teacherId' does not exist on type 'T'I can't seem to figure out what I am overlooking in terms of TypeScript generics.
In an ideal scenario, TypeScript should recognize that in the BaseValidator, the args object is an instance of QueryArgs.
Any help or insights would be greatly appreciated. Thank you!