Add Student.getParents

lib/Student.js

@@ -30,6 +30,27 @@ class Student extends User {
 		}));
 	}
 
+	async getParents() {
+		const sql = `
+			select
+				parentId
+			from
+				studentParentLink
+			where
+				studentId = ?;
+		`;
+
+		return await Promise.all(
+			(await this._conn.runQuery(sql, [ this.id ]))
+				.map(({ parentId }) => {
+					return new (require('./Parent'))(
+						this._conn,
+						parentId
+					);
+				})
+		);
+	}
+
 	static async createStudent(conn, fname, oname, lname, email, password) {
 		return await super.createUser(
 			conn,