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Data structure

Lecture

has_one location has_many users (attendees) has_one lecturer (user) has_many resources

id (required, numeric) title (require, max 200) lecturer_id (Class User)

Resources

belongs_to lecture

id (required, numeric) name (optional, max length xxx) link (required, validate link)

Location

has_many lectures

id

Users

has_many lectures

id name