如何在Ruby on Rails中从控制台调用控制器/视图助手方法?

当我加载脚本/控制台时，有时我想使用控制器或视图助手方法的输出。

有没有办法:

模拟一个请求? 从控制器实例调用方法说请求? 测试助手方法，无论是通过所说的控制器实例或其他方式?

当前回答

如果你需要从控制台进行测试(在Ruby on Rails 3.1和4.1上进行测试):

调用控制器操作:

app.get '/'
   app.response
   app.response.headers  # => { "Content-Type"=>"text/html", ... }
   app.response.body     # => "<!DOCTYPE html>\n<html>\n\n<head>\n..."

控制器方法:

foo = ActionController::Base::ApplicationController.new
foo.public_methods(true||false).sort
foo.some_method

路线助手:

app.myresource_path     # => "/myresource"
app.myresource_url      # => "http://www.example.com/myresource"

视图助手:

foo = ActionView::Base.new

foo.javascript_include_tag 'myscript' #=> "<script src=\"/javascripts/myscript.js\"></script>"

helper.link_to "foo", "bar" #=> "<a href=\"bar\">foo</a>"

ActionController::Base.helpers.image_tag('logo.png')  #=> "<img alt=\"Logo\" src=\"/images/logo.png\" />"

呈现:

views = Rails::Application::Configuration.new(Rails.root).paths["app/views"]
views_helper = ActionView::Base.new views
views_helper.render 'myview/mytemplate'
views_helper.render file: 'myview/_mypartial', locals: {my_var: "display:block;"}
views_helper.assets_prefix  #=> '/assets'

ActiveSupport这样方法:

require 'active_support/all'
1.week.ago
=> 2013-08-31 10:07:26 -0300
a = {'a'=>123}
a.symbolize_keys
=> {:a=>123}

自由模块:

> require 'my_utils'
 => true
> include MyUtils
 => Object
> MyUtils.say "hi"
evaluate: hi
 => true

2012-02-06 12:07:31

其他回答

在Ruby on Rails 3中，试试这个:

session = ActionDispatch::Integration::Session.new(Rails.application)
session.get(url)
body = session.response.body

主体将包含URL的HTML。

如何路由和呈现(调度)从一个模型在Ruby on Rails 3

2013-03-29 18:19:13

在Ruby on Rails控制台中测试Helper方法的一种可能方法是:

Struct.new(:t).extend(YourHelper).your_method(*arg)

和重载做:

reload!; Struct.new(:t).extend(YourHelper).your_method(*arg)

2016-06-15 08:57:31

在任何控制器动作或视图中，都可以通过调用console方法来调用控制台。

例如，在控制器中:

class PostsController < ApplicationController
  def new
    console
    @post = Post.new
  end
end

或在视图中:

<% console %>

<h2>New Post</h2>

这将在视图中呈现一个控制台。您不需要关心控制台调用的位置;它不会在调用时立即呈现，而是在HTML内容旁边呈现。

参见:http://guides.rubyonrails.org/debugging_rails_applications.html

2017-12-24 07:18:48

如果你需要从控制台进行测试(在Ruby on Rails 3.1和4.1上进行测试):

调用控制器操作:

app.get '/'
   app.response
   app.response.headers  # => { "Content-Type"=>"text/html", ... }
   app.response.body     # => "<!DOCTYPE html>\n<html>\n\n<head>\n..."

控制器方法:

foo = ActionController::Base::ApplicationController.new
foo.public_methods(true||false).sort
foo.some_method

路线助手:

app.myresource_path     # => "/myresource"
app.myresource_url      # => "http://www.example.com/myresource"

视图助手:

foo = ActionView::Base.new

foo.javascript_include_tag 'myscript' #=> "<script src=\"/javascripts/myscript.js\"></script>"

helper.link_to "foo", "bar" #=> "<a href=\"bar\">foo</a>"

ActionController::Base.helpers.image_tag('logo.png')  #=> "<img alt=\"Logo\" src=\"/images/logo.png\" />"

呈现:

views = Rails::Application::Configuration.new(Rails.root).paths["app/views"]
views_helper = ActionView::Base.new views
views_helper.render 'myview/mytemplate'
views_helper.render file: 'myview/_mypartial', locals: {my_var: "display:block;"}
views_helper.assets_prefix  #=> '/assets'

ActiveSupport这样方法:

require 'active_support/all'
1.week.ago
=> 2013-08-31 10:07:26 -0300
a = {'a'=>123}
a.symbolize_keys
=> {:a=>123}

自由模块:

> require 'my_utils'
 => true
> include MyUtils
 => Object
> MyUtils.say "hi"
evaluate: hi
 => true

2012-02-06 12:07:31

对于控制器，可以在Ruby on Rails控制台中实例化控制器对象。

例如,

class CustomPagesController < ApplicationController

  def index
    @customs = CustomPage.all
  end

  def get_number
    puts "Got the Number"
  end

  protected

  def get_private_number
    puts 'Got private Number'
  end

end

custom = CustomPagesController.new
2.1.5 :011 > custom = CustomPagesController.new
 => #<CustomPagesController:0xb594f77c @_action_has_layout=true, @_routes=nil, @_headers={"Content-Type"=>"text/html"}, @_status=200, @_request=nil, @_response=nil>
2.1.5 :014 > custom.get_number
Got the Number
 => nil

# For calling private or protected methods,
2.1.5 :048 > custom.send(:get_private_number)
Got private Number
 => nil

2019-02-01 09:54:25

如何在Ruby on Rails中从控制台调用控制器/视图助手方法?

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