命名路由
path是相對路徑
url是絕對路徑
model為復(fù)數(shù)的會對應(yīng)到action=>index, 為單數(shù)時需要傳遞id參數(shù)并對應(yīng)到action=>show
如對于user而言：
users_url # => http://localhost:3000/users
users_path # => /users
user_path(1) # => /users/1
user_url(1) # => http://localhost:3000/users/1
區(qū)別_url與_path
