btrc-hub/backend/app/models/user.rb

class User < ApplicationRecord
  enum :role, guest: 'guest', member: 'member', admin: 'admin'

  validates :name, length: { maximum: 255 }
  validates :inheritance_code, presence: true, length: { maximum: 64 }
  validates :role, presence: true, inclusion: { in: roles.keys }
  validates :banned, inclusion: { in: [true, false] }

  has_many :created_posts,
           class_name: 'Post', foreign_key: :uploaded_user_id, dependent: :nullify
  has_many :settings
  has_many :user_ips, dependent: :destroy
  has_many :ip_addresses, through: :user_ips
  has_many :user_post_views, dependent: :destroy
  has_many :viewed_posts, through: :user_post_views, source: :post
  has_many :created_wiki_pages,
           class_name: 'WikiPage', foreign_key: :created_user_id, dependent: :nullify
  has_many :updated_wiki_pages,
           class_name: 'WikiPage', foreign_key: :updated_user_id, dependent: :nullify

  def viewed?(post) = user_post_views.exists?(post_id: post.id)
  def gte_member? = member? || admin?
end