class User < ActiveRecord::Base
  has_many :posts
  
  validates_presence_of :username
  validates_presence_of :password_hash
end

class CreateUserTable < ActiveRecord::Migration[6.0]
  def change
    create_table :users do |t|
      t.string :name
      t.string :username, null: false, unique: true, index: true
      t.string :password_hash, null: false
      t.timestamps
    end
  end
end