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class Comment < ActiveRecord::Base
belongs_to :post
belongs_to :user, optional: true
validates_presence_of :date
validates_format_of :email, with: /@/
validates_presence_of :body
validate :user_or_guest
private
def user_or_guest
user.present? or (author.present? and email.present?)
end
end
class CreateCommentTable < ActiveRecord::Migration[6.0]
def change
create_table :comments do |t|
t.references :post, foreign_key: true, index: true, null: false
t.references :user, foreign_key: true
t.string :author
t.string :email
t.string :body, null: false
t.timestamps
end
end
end
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