How do I call controller/view methods from the con

2019-01-01 13:53发布

站内问答 / 前沿技术
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When I load script/console, some times I want play with the output of a controller or a view helper method.

Are there ways to:

  • simulate a request?
  • call methods from a controller instance on said request?
  • test helper methods, either via said controller instance or another way?

13条回答
查无此人
2楼-- · 2019-01-01 14:20

An easy way to call a controller action from script/console and view/manipulate the response object is:

> app.get '/posts/1'
> response = app.response
# you now have a rails response object much like the integration tests

> response.body            # get you the HTML
> response.cookies         # hash of the cookies

# etc, etc

The app object is an instance of ActionController::Integration::Session

This works for me using Rails 2.1 and 2.3, I did not try earlier versions.

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余欢
3楼-- · 2019-01-01 14:23

To call helpers, use the helper object:

$ ./script/console
>> helper.number_to_currency('123.45')
=> "R$ 123,45"

If you want to use a helper that's not included by default (say, because you removed helper :all from ApplicationController), just include the helper.

>> include BogusHelper
>> helper.bogus
=> "bogus output"

As for dealing with controllers, I quote Nick's answer:

> app.get '/posts/1'
> response = app.response
# you now have a rails response object much like the integration tests

> response.body            # get you the HTML
> response.cookies         # hash of the cookies

# etc, etc
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情到深处是孤独
4楼-- · 2019-01-01 14:24

Another way to do this is to use the rails debugger. There's a Rails Guide about debugging at http://guides.rubyonrails.org/debugging_rails_applications.html

Basically, start the server with the -u option:

./script/server -u

And then insert a breakpoint into your script where you would like to have access to the controllers/helpers/etc..

class EventsController < ApplicationController
  def index
    debugger
  end
end

And when you make a request and hit that part in the code, the server console will return a prompt where you can then make requests, view objects, etc.. from a command prompt. When finished, just type 'cont' to continue execution. There are also options for extended debugging, but this should at least get you started.

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忆尘夕之涩
5楼-- · 2019-01-01 14:32

Here is how to make an authenticated POST request, using Refinery as an example:

# Start Rails console
rails console
# Get the login form
app.get '/community_members/sign_in'
# View the session
app.session.to_hash
# Copy the CSRF token "_csrf_token" and place it in the login request.
# Log in from the console to create a session
app.post '/community_members/login', {"authenticity_token"=>"gT7G17RNFaWUDLC6PJGapwHk/OEyYfI1V8yrlg0lHpM=",  "refinery_user[login]"=>'chloe', 'refinery_user[password]'=>'test'}
# View the session to verify CSRF token is the same
app.session.to_hash
# Copy the CSRF token "_csrf_token" and place it in the request. It's best to edit this in Notepad++
app.post '/refinery/blog/posts', {"authenticity_token"=>"gT7G17RNFaWUDLC6PJGapwHk/OEyYfI1V8yrlg0lHpM=", "switch_locale"=>"en", "post"=>{"title"=>"Test", "homepage"=>"0", "featured"=>"0", "magazine"=>"0", "refinery_category_ids"=>["1282"], "body"=>"Tests do a body good.", "custom_teaser"=>"", "draft"=>"0", "tag_list"=>"", "published_at(1i)"=>"2014", "published_at(2i)"=>"5", "published_at(3i)"=>"27", "published_at(4i)"=>"21", "published_at(5i)"=>"20", "custom_url"=>"", "source_url_title"=>"", "source_url"=>"", "user_id"=>"56", "browser_title"=>"", "meta_description"=>""}, "continue_editing"=>"false", "locale"=>:en}

You might find these useful too if you get an error:

app.cookies.to_hash
app.flash.to_hash
app.response # long, raw, HTML
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泛滥B
6楼-- · 2019-01-01 14:33

If you need to test from the console (tested on Rails 3.1 and 4.1):

Call Controller Actions:

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

ApplicationController methods:

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

Route Helpers:

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

View Helpers:

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\" />"

Render:

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 methods:

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

Lib modules:

> require 'my_utils'
 => true 
> include MyUtils
 => Object 
> MyUtils.say "hi"
evaluate: hi
 => true
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查无此人
7楼-- · 2019-01-01 14:33

Here's one way to do this through the console:

>> foo = ActionView::Base.new
=> #<ActionView::Base:0x2aaab0ac2af8 @assigns_added=nil, @assigns={}, @helpers=#<ActionView::Base::ProxyModule:0x2aaab0ac2a58>, @controller=nil, @view_paths=[]>

>> foo.extend YourHelperModule
=> #<ActionView::Base:0x2aaab0ac2af8 @assigns_added=nil, @assigns={}, @helpers=#<ActionView::Base::ProxyModule:0x2aaab0ac2a58>, @controller=nil, @view_paths=[]>

>> foo.your_helper_method(args)
=> "<html>created by your helper</html>"

Creating a new instance of ActionView::Base gives you access to the normal view methods that your helper likely uses. Then extending YourHelperModule mixes its methods into your object letting you view their return values.

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