blocks|key|918983|text|当控制器执行redirect_to语句时会发生什么？|type|unordered-list-item|depth|inlineStyleRanges|entityRanges|data|918984|unstyled|918985|918986|它会触发对您的new服务器的新请求。|918987|它是否将控件传递给存储控制器，并停止执行新的或非新的操作？|918988|918989|918990|它不是从一个控制器传递到另一个控制器，而是告诉浏览器转到另一个控制器。所以这不是你的应用程序的内部。|918991|它执行返回和Order.new语句吗？|918992|918993|918994|重定向是在控制器到达return之后发生的。|offset|length|style|CODE|918995|这里返回语句的目标是什么？|918996|918997|918998|在这种情况下，您必须显式地告诉控制器您已经完成了|918999|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|A|6|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|-4|5|C|7|15|8|@]|9|@]|A|$]]|$1|D|3|-4|5|C|7|16|8|@]|9|@]|A|$]]|$1|E|3|F|5|C|7|17|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|18|8|@]|9|@]|A|$]]|$1|I|3|-4|5|C|7|19|8|@]|9|@]|A|$]]|$1|J|3|-4|5|C|7|1A|8|@]|9|@]|A|$]]|$1|K|3|L|5|C|7|1B|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1C|8|@]|9|@]|A|$]]|$1|O|3|-4|5|C|7|1D|8|@]|9|@]|A|$]]|$1|P|3|-4|5|C|7|1E|8|@]|9|@]|A|$]]|$1|Q|3|R|5|C|7|1F|8|@$S|1G|T|1H|U|V]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1I|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|C|7|1J|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|C|7|1K|8|@]|9|@]|A|$]]|$1|10|3|11|5|C|7|1L|8|@]|9|@]|A|$]]|$1|12|3|-4|5|C|7|1M|8|@]|9|@]|A|$]]]|13|$]]

<ul>
<li>What happens when the controller executes the redirect_to statement? </li>
</ul>

It triggers a new request to your webserver

<ul>
<li>Does it pass the control to the store controller and it stops to execute the action new or not?</li>
</ul>

it doesnt pass from controller to controller, it tells the browser to go to another controller. So its not internal to your app.

<ul>
<li>Does it execute the return and Order.new statements?</li>
</ul>

redirection happens once your controller reaches <code>return</code> everything after is not touched

<ul>
<li>What is the goal of the return statement here?</li>
</ul>

You have to explicitly tell the controller that you're done in this case

blocks|key|919023|text|redirect_to|type|unstyled|depth|inlineStyleRanges|entityRanges|data|919024|触发对new服务器的新请求。|unordered-list-item|919025|919026|919027|返回|919028|如果您输入显式返回，那么它允许您提前退出，并且不执行返回关键字后面的返回内容。|919029|919030|919031|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$]]|$1|E|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|V|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|N|$]]

redirect_to 

<ul>
<li>triggers a new request to your webserver</li>
</ul>

Return

<ul>
<li>If you put explicit return then it allows you to break out early and do not execute whatever you have return after your return keyword</li>
</ul>

blocks|key|919060|text|redirect_to只是一个方法调用。它注意到控制器动作希望在动作完成后发出HTTP+302+(而不是呈现某些视图)。在redirect_to方法返回后，该操作继续执行，因此它不会完全传递控制流。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|919061|因此，您需要在计划在return中重定向之后，在这里使用redirect_to来停止该操作的执行。如果省略了return，则在重定向发生之前将执行Order.new语句。|919062|entityMap^0|0|B|1P|B|0|A|6|S|B|1I|6|21|9|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|I|$]]

The <code>redirect_to</code> just a method call. It notes the desire of the controller action to emit an HTTP 302 (instead of rendering some view) after the action is completed. After the <code>redirect_to</code> method returns, the action continues to execute, it thus doesn't pass the control flow away completely.

Because of that, you need to use <code>return</code> here to stop the execution of the action after you scheduled the redirect in <code>redirect_to</code>. If you would have omit the <code>return</code>, the <code>Order.new</code> statement would have been executed before the redirect occurred.

blocks|key|458071|text|你也可以写这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|458072|def+new
+++return+redirect_to+store_url,+notice:+'Your+cart+is+empty'+if+@cart.line_items.empty?
+++@order+=+Order.new+
end|code-block|syntax|javascript|458073|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can also write this

<pre><code>def new
 return redirect_to store_url, notice: 'Your cart is empty' if @cart.line_items.empty?
 @order = Order.new 
end
</code></pre>

I have the following code in my controller:

<pre><code>def new
 if @cart.line_items.empty?
 redirect_to store_url, notice: 'Your cart is empty'
 return
 end

 @order = Order.new
end
</code></pre>

I have the following questions:

<ol>
<li>What happens when the controller executes the <code>redirect_to</code> statement? Does it pass the control to the store controller and it stops to execute the action <code>new</code> or not? Does it execute the <code>return</code> and <code>Order.new</code> statements?</li>
<li>What is the goal of the <code>return</code> statement here?</li>
</ol>

Handle a redirect_to

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我的控制器中有以下代码：def new  if @cart.line_items.empty?    redirect_to store_url, notice: 'Your cart is empty'    return  end  @order = Order.newend我有以下问题：当控制器执行redirec...

问处理redirect_to
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