Collections & Schemas

Collection	Description	Key Fields (Example)
User	Stores user info including roles & contacts	_id, name, email, password (hashed), phoneNumber, role, createdAt
Course	Contains course metadata and instructor refs	_id, title, description, instructorId, category, price, createdAt
Lesson	Individual lessons per course	_id, courseId, title, transactions (sequence), createdAt
Modules	Videos, PDFs linked to lessons	_id, lessonId, type (video/pdf), url, title, createdAt
Transaction	Records purchase/payment info	_id, userId, courseId, status (pending/completed/cancelled), paymentMethod, amount, createdAt
Certificate	Certificates issued for completed courses	_id, userId, courseId, certificateUrl, issuedDate, createdAt
Review	User ratings and comments on courses	_id, userId, courseId, rating (1-5), comment, createdAt