Facebook-Clone/db/migrate/20180613071433_create_table_posts.rb

class CreateTablePosts < ActiveRecord::Migration[5.2]
  def change
    create_table :posts do |t|
      t.integer :author_id,null:false
      t.text :body,null:false
      t.timestamps
    end
    add_index :posts,:author_id
  end
end