### Rails &gt;= 3.2 (including Rails 4+ and 5+):

    class Countries &lt; ActiveRecord::Base
      self.table_name = &quot;cc&quot;
    end


### Rails &lt;= 3.1:

    class Countries &lt; ActiveRecord::Base
      self.set_table_name &quot;cc&quot;
      ...
    end



    class Countries &lt; ActiveRecord::Base
        self.table_name = &quot;cc&quot;
    end

In Rails 3.x this is the way to specify the table name.

How do you define Global variables in Java  ? 

Global variables in Java

In Java the numeric types all descend from Number so I would use

    (x instanceof Number).

What is the python equivalent?

How can I check if my python object is a number?

I have a Model class called Countries and I want it to map to a DB table called &#39;cc&#39;.

How is that done in Rails?

How do I explicitly specify a Model&#39;s table-name mapping in Rails?

<p>I have a Model class called Countries and I want it to map to a DB table called 'cc'.</p>
<p>How is that done in Rails?</p>


I am doing some exception handling in my controller, when there is an exception thrown in :create action, I will render to the :new action and show a flash message.

Everything works fine, I can see the flash message when exception caught, but when I **redirect to(handly click)** other page, the flash message **still here**. Then I redirect to another page(**the second handly click)**, the message could disappear.

Anyone who knows what is the reason?

My controller code:

    class MessagesController &lt; ApplicationController
      rescue_from Exception, :with =&gt; :render_new
      
      def new
      end

      def create
      end

    private
      def render_new
        flash[:alert] = t(&quot;uploading_error&quot;)
        render :action =&gt; :new
      end
    end

My layout code (Haml):

    %body
      #content
        - unless flash[:alert].blank?
          #alert= flash[:alert]

Why flash message won&#39;t disappear?

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What are the WordPress alternatives for Ruby on Rails?

I want to rename a table... (any table.)

I tried this line of code:

    ActiveRecord::ConnectionAdapters::SchemaStatements.rename_table(old_name, new_name)


Here&#39;s the weird thing.  I know I got it working the first time, but now I get this error: undefined method `rename_table&#39; for ActiveRecord::ConnectionAdapters::SchemaStatements:Module

Was there something I need to set?


Renaming table in rails

I&#39;m on Rails 2.3.3, and I need to make a link that sends a post request.

I have one that looks like this:

    = link_to(&#39;Resend Email&#39;, 
      {:controller =&gt; &#39;account&#39;, :action =&gt; &#39;resend_confirm_email&#39;}, 
      {:method =&gt; :post} )

Which makes the appropriate JavaScript behavior on the link:

    &lt;a href=&quot;/account/resend_confirm_email&quot; 
      onclick=&quot;var f = document.createElement(&#39;form&#39;); 
      f.style.display = &#39;none&#39;; 
      this.parentNode.appendChild(f); 
      f.method = &#39;POST&#39;; 
      f.action = this.href;
      var s = document.createElement(&#39;input&#39;); 
      s.setAttribute(&#39;type&#39;, &#39;hidden&#39;); 
      s.setAttribute(&#39;name&#39;, &#39;authenticity_token&#39;); 
      s.setAttribute(&#39;value&#39;, &#39;EL9GYgLL6kdT/eIAzBritmB2OVZEXGRytPv3lcCdGhs=&#39;);
      f.appendChild(s);
      f.submit();
      return false;&quot;&gt;Resend Email&lt;/a&gt;&#39;

My controller action is working, and set to render nothing:

    respond_to do |format|
      format.all { render :nothing =&gt; true, :status =&gt; 200 }
    end

But when I click the link, my browser downloads an empty text file named &quot;resend_confirm_email.&quot;

What gives?

&quot;render :nothing =&gt; true&quot; returns empty plaintext file?

I am converting a Rails 2 application to Rails 3. I currently have a controller set up like the following:

    class Api::RegionsController &lt; ApplicationController
      respond_to :xml, :json
    end

with and an action that looks like the following:

    def index
      @regions = Region.all

      respond_with @regions  
    end

The implementation is pretty straightforward, api/regions, api/regions.xml and api/regions.json all respond as you would expect. The problem is that I want api/regions by default to respond via XML. I have consumers that expect an XML response and I would hate to have them change all their URLs to include .xml unless absolutely necessary. 

In Rails 2 you would accomplish that by doing this:

    respond_to do |format|
      format.xml { render :xml =&gt; @region.to_xml }
      format.json { render :json =&gt; @region.to_json }
    end

But in Rails 3 I cannot find a way to default it to an XML response. Any ideas?

Content Type	Original Author	Original Content on Stackoverflow
Question	Eran Kampf	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	Zabba	View Answer on Stackoverflow
Solution 2 - Ruby on-Rails	chelofm	View Answer on Stackoverflow

How do I explicitly specify a Model's table-name mapping in Rails?

Ruby on-Rails Problem Overview

Ruby on-Rails Solutions

Solution 1 - Ruby on-Rails

Rails >= 3.2 (including Rails 4+ and 5+):

Rails <= 3.1:

Solution 2 - Ruby on-Rails

How can I check if my python object is a number?

Global variables in Java

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