rusllonrails

1. Mysql only

> ids = [11,31,29]
=> [11, 31, 29]
> Page.where(id: ids).order("field(id, #{ids.join(',')})")

2. Postrgesql variant

  def self.order_by_ids(ids)
    order_by = ["case"]

rstacruz

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')