Ruby-on-rails Rails：从控制台检查路径助手的输出
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Rails: Check output of path helper from console
提问by Derek Thurn
Rails defines a bunch of magic with named routes that make helpers for your routes. Sometimes, especially with nested routes, it can get a little confusing to keep track of what URL you'll get for a given route helper method call. Is it possible to, using the Ruby console, see what link a given helper function will generate? For example, given a named helper like post_path(post) I want to see what URL is generated.
Rails 定义了一堆带有命名路由的魔法，它们为你的路由提供帮助。有时，尤其是对于嵌套路由，跟踪给定路由辅助方法调用将获得的 URL 可能会有些混乱。是否可以使用 Ruby 控制台查看给定的辅助函数将生成什么链接？例如，给定一个像 post_path(post) 这样的命名助手，我想看看生成了什么 URL。
回答by Chubas
You can show them with rake routesdirectly.
您可以rake routes直接显示它们。
In a Rails console, you can call app.post_path. This will work in Rails ~= 2.3 and >= 3.1.0.
在 Rails 控制台中，您可以调用app.post_path. 这将适用于 Rails ~= 2.3 和 >= 3.1.0。
回答by aghull
you can also
你也可以
include Rails.application.routes.url_helpers
from inside a console sessions to access the helpers:
从控制台会话内部访问帮助程序：
url_for controller: :users, only_path: true
users_path
# => '/users'
or
或者
Rails.application.routes.url_helpers.users_path
回答by user3622458
In the Rails console, the variable app holds a session object on which you can call path and URL helpers as instance methods.
在 Rails 控制台中，变量 app 包含一个会话对象，您可以在该对象上调用路径和 URL 助手作为实例方法。
app.users_path
回答by Deepak Mahakale
You can always check the output of path_helpersin console. Just use the helper with app
您始终可以path_helpers在控制台中检查输出。只需使用助手app
app.post_path(3)
#=> "/posts/3"
app.posts_path
#=> "/posts"
app.posts_url
#=> "http://www.example.com/posts"
回答by Arup Rakshit
Remember if your route is name-spaced, Like:
请记住，如果您的路线是命名空间的，例如：
product GET /products/:id(.:format) spree/products#show
Then try :
然后尝试：
helper.link_to("test", app.spree.product_path(Spree::Product.first), method: :get)
output
输出
Spree::Product Load (0.4ms) SELECT "spree_products".* FROM "spree_products" WHERE "spree_products"."deleted_at" IS NULL ORDER BY "spree_products"."id" ASC LIMIT 1
=> "<a data-method=\"get\" href=\"/products/this-is-the-title\">test</a>"
