Netbeans 中的 hpricot

发布于 2024-08-11 22:48:26 字数 534 浏览 10 评论 0原文

我正在尝试在 JRuby 中使用 hpricot。我的问题如下。如果我有这个代码：

 #!ruby
 require 'hpricot'
 require 'open-uri'
 # load the RedHanded home page
 doc = Hpricot(open("http://redhanded.hobix.com/index.html"))

我应该把它放在哪里？进入我的控制器？因为那里不接受它。如果我应该将它放入我的模型中。从我的角度来看，我该如何称呼它？

谢谢，

当我尝试使用wired.com网站时，它给了我这个错误

Errno::ENOENT 中产品控制器#create
没有这样的文件或目录 - 文件不是找到 - www.wired.com
RAILS_ROOT：H:\文档和设置/所有者/我的文档/NetBeansProjects/RailsApplication5

原文

I am trying to use hpricot in JRuby.
My problem is the following. If I have this code:

 #!ruby
 require 'hpricot'
 require 'open-uri'
 # load the RedHanded home page
 doc = Hpricot(open("http://redhanded.hobix.com/index.html"))

where do I put it?
Into my controller? Because its not accepting it there.
And if I'm supposed to put it in my model. How can I call it frm my view?

Thank you

it gives me this error when trying the wired.com website

Errno::ENOENT in
ProductsController#create
No such file or directory - File not
found - www.wired.com
RAILS_ROOT: H:\Documents and
Settings/owner/My
Documents/NetBeansProjects/RailsApplication5

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失而复得 2024-08-18 22:48:26

让 Rails 了解并查看 Hpricot 并不难。

安装 Hpricot：jruby -S gem install hpricot。
在 Rails 应用中，找到 config/environment.rb 文件
在文件中找到以 config.gem 开头的行并添加
config.gem "hpricot", :source =>; "http://code.whytheluckystiff.net"
现在您将能够像在正常 (J)Ruby 代码中一样直接从控制器使用 Hpricot。我强烈建议不要将任何类型的业务逻辑放入您的视图中，只添加最低限度的条件，以保持理智，并保持事物的直接性、可读性和可维护性。或者，如果您遵循“瘦控制器、简单视图、胖模型”范例，则可以重构代码并将 Hpricot 调用直接放入可从视图访问的模型类内的方法中。

下面是一些代码示例。

示例控制器 RAILS_ROOT/app/controllers/example_controller.rb：

class ExampleController < ApplicationController
  def index
    @doc = Hpricot(open("http://www.wired.com"))
    # here come some very serious calculations, queries etc.
  end
end

使用控制器的示例视图 RAILS_ROOT/app/views/example/index.html.erb：

<pre>
  <%= @doc ? @doc.to_s : "There is no content at the site" %>
  <!-- blablabla -->
</pre>

正如我所提到的，您也许可以将 Hpricot(open(...)) 调用推回到模型，但首先像这样尝试一下。如果有效，请重构:)

Getting Rails to understand and see Hpricot is not very hard to do.

Install Hpricot: jruby -S gem install hpricot.
In your Rails app, find the config/environment.rb file
Find the lines which start with config.gem in the file and add
config.gem "hpricot", :source => "http://code.whytheluckystiff.net"
Now you'll be able to use Hpricot directly from a controller as in normal (J)Ruby code. I strongly advise not to put any kind of business logic into your views and only minimal conditionals for sanity and in order to keep things straight, readable and maintainable. Or if you follow the "skinny controllers, simple views, fat models" paradigm, you may be able to refactor the code and put the Hpricot calls directly into a method inside your model class that is accessible from the view.

Some code examples are below.

Example controller RAILS_ROOT/app/controllers/example_controller.rb:

class ExampleController < ApplicationController
  def index
    @doc = Hpricot(open("http://www.wired.com"))
    # here come some very serious calculations, queries etc.
  end
end

Example view RAILS_ROOT/app/views/example/index.html.erb using the controller:

<pre>
  <%= @doc ? @doc.to_s : "There is no content at the site" %>
  <!-- blablabla -->
</pre>

As I've mentioned, you might be able to push the Hpricot(open(...)) call back to the model, but first give it a try like this. If it's working, refactor :)

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