example/db/migrate/20131102130413_create_posts.rb
class CreatePosts < ActiveRecord::Migration[4.2]
def change
create_table :posts do |t|
t.integer :user_id, null: false
t.string :title, null: false
t.string :body, null: false
t.string :category_name, null: false
t.integer :views_count, null: false, default: 0
t.integer :likes_count, null: false, default: 0
t.integer :comments_count, null: false, default: 0
t.boolean :published, null: false, default: false
t.timestamps
end
add_index :posts, :user_id
end
end