    Rails.env == &quot;production&quot;

    Rails.env == &quot;development&quot;

As mentioned by @xoebus, this is far better:

    Rails.env.production?

    Rails.env.development?

The standard approach for using variable values in SQLite queries is the &quot;question mark style&quot;, like this:

&lt;!-- language: lang-py --&gt;

    import sqlite3
    with sqlite3.connect(&quot;:memory:&quot;) as connection:
        connection.execute(&quot;CREATE TABLE foo(bar)&quot;)
        connection.execute(&quot;INSERT INTO foo(bar) VALUES (?)&quot;, (&quot;cow&quot;,))
        
        print(list(connection.execute(&quot;SELECT * from foo&quot;)))
        # prints [(u&#39;cow&#39;,)]

However, this only works for substituting values into queries. It fails when used for table or column names:

&lt;!-- language: lang-py --&gt;

    import sqlite3
    with sqlite3.connect(&quot;:memory:&quot;) as connection:
        connection.execute(&quot;CREATE TABLE foo(?)&quot;, (&quot;bar&quot;,))
        # raises sqlite3.OperationalError: near &quot;?&quot;: syntax error

Neither the `sqlite3` module nor [PEP 249](http://www.python.org/dev/peps/pep-0249/) mention a function for escaping names or values. Presumably this is to discourage users from assembling their queries with strings, but it leaves me at a loss.

What function or technique is most appropriate for using variable names for columns or tables in SQLite? I&#39;d would strongly prefer to do able to do this without any other dependencies, since I&#39;ll be using it in my own wrapper.

I looked for but couldn&#39;t find a clear and complete description of the relevant part of SQLite&#39;s syntax, to use to write my own function. I want to be sure this will work for any identifier permitted by SQLite, so a trial-and-error solution is too uncertain for me.

SQLite [uses `&quot;` to quote identifiers](http://www.sqlite.org/lang_keywords.html) but I&#39;m not sure that just escaping them is sufficient. PHP&#39;s [`sqlite_escape_string`](http://php.net/manual/en/function.sqlite-escape-string.php) function&#39;s documentation suggests that certain binary data may need to be escaped as well, but that may be a quirk of the PHP library.


How do you escape strings for SQLite table/column names in Python?

I need to save an image from a url using CURL and save it to a folder on my server.  I&#39;ve been battling with this code to no avail.  Ideally I&#39;d like to grab the image and save it as &quot;photo1&quot; or something.  Help!  

    	function GetImageFromUrl($link)
		 
		{
		 
		$ch = curl_init();
		 
		curl_setopt($ch, CURLOPT_POST, 0);
		 
		curl_setopt($ch,CURLOPT_URL,$link);
		 
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		 
		$result=curl_exec($ch);
		 
		curl_close($ch);
		 
		return $result;
		 
		}
		
		$sourcecode = GetImageFromUrl($iticon);
		
		$savefile = fopen(&#39; /img/uploads/&#39; . $iconfilename, &#39;w&#39;);
		fwrite($savefile, $sourcecode);
		fclose($savefile);



Save image from url with curl PHP

I am doing a project in rails, I would like to know How do I check whether I am running in developer mode  or  production mode in code ?


Thanks

Rails - How do I check developer mode or production mode in code

<p>I am doing a project in rails, I would like to know How do I check whether I am running in developer mode  or  production mode in code ?</p>
<p>Thanks</p>


How can I get yesterday&#39;s date?

maybe:

    @get_time_now    = Time.now.strftime(&#39;%m/%d/%Y&#39;) / 86400 

or

    @get_time_now    = Time.now.strftime(&#39;%m/%d/%Y&#39;) - 1.day

or

    @get_time_now    = Time.now. / 86400 

86400 = 1 day, right? (60 * 60 * 24)

Rails: How I can get yesterday&#39;s date?

Does anyone know how to add another folder to the asset pipeline in Rails 3.1?

I&#39;d like to serve `app/assets/fonts` the same way `app/assets/images` is served.

- - - - -
**Update: 5-7-2013**

Just to add some clarification for future people who find this question to explicitly add an asset path, in your application.rb file:

    config.assets.paths &lt;&lt; &quot;#{Rails.root}/app/assets/fonts&quot;

However, since the above path is under `app/assets` you don&#39;t have to add it explicitly, you just need to restart your rails app so Sprockets can pick it up.

You will have to explicitly add paths that are outside of `app/assets`,`lib/assets`, or `vendor/assets`, and just remember that while Sprockets picks up new files in folders that were present when your application loaded, in my experience it does not pick up new folders in the asset paths without a restart.

Add a new asset path in Rails 3.1

I&#39;ve been looking into some rails admin plugins and came across these:

[https://github.com/gregbell/active_admin][1]

[https://github.com/sferik/rails_admin][2]

[https://github.com/thoughtbot/administrate][3] (EDIT: added later)

Any suggestions as to which one to go with. I would need it to support model associations and file uploads abilities. 


  [1]: https://github.com/gregbell/active_admin
  [2]: https://github.com/sferik/rails_admin
  [3]: https://github.com/thoughtbot/administrate

Rails Admin vs. ActiveAdmin

I&#39;m using the carrierwave gem to upload files.

I have built a system for users to flag images as inappropriate and for admins to remove the images. From what I can tell, calling destroy on the image will only remove the path name from the table.

Is there a way to have carrierwave actually remove the file itself? Or should rails automatically remove the file when I destroy the image path?

How to make carrierwave delete the file when destroying a record?

I&#39;ve installed devise on my app and applied the following in my `application.html.erb` file:

    &lt;div id=&quot;user_nav&quot;&gt;
		&lt;% if user_signed_in? %&gt;
			Signed in as &lt;%= current_user.email %&gt;. This cannot be cheese?
			&lt;%= link_to &#39;Sign out&#39;, destroy_user_session_path %&gt;
		&lt;% else %&gt;
			&lt;%= link_to &#39;Register&#39;, new_user_registration_path %&gt; or &lt;%= link_to &#39;Sign in&#39;, new_user_session_path %&gt;
		&lt;% end %&gt;
	&lt;/div&gt;

I ran `rake routes` and confirmed that all the routes are valid.

Also, in my `routes.rb` file I have `devise_for :users` and `root :to =&gt; &quot;home#index&quot;`. 

I get the following routing error when clicking the &quot;Sign out&quot; link:

    No route matches &quot;/users/sign_out&quot;

Any ideas what&#39;s causing the error?

No route matches &quot;/users/sign_out&quot; devise rails 3

Is possible have a git branch dependency, inside mygem.gemspec?

I&#39;m thinking something similar to the following:

    gem.add_runtime_dependency &#39;oauth2&#39;, :git =&gt; &#39;git@github.com:lgs/oauth2.git&#39;

... but it doesn&#39;t work.

Ruby Gemspec Dependency: Is possible have a git branch dependency?

Right now I&#39;m doing a `split` on a string and assuming that the newline from the user is `\r\n` like so:

    string.split(/\r\n/)

What I&#39;d like to do is split on either `\r\n` or just `\n`.

So how what would the regex be to split on either of those?

Split on different newlines

I have two models `restaurant` and `user` that I want to perform a has_and_belongs_to_many relationship.

I have already gone into the model files and added the `has_and_belongs_to_many :restaurants` and `has_and_belongs_to_many :users`

I assume at this point I should be able to do something like with Rails 3:

    rails generate migration ....

but everything I have tried seems to fail. I&#39;m sure this is something really simple I&#39;m new to rails so I&#39;m still learning.

Rails has_and_belongs_to_many migration

I looked around on how to change the dynamic params slot and found this post that does the exact thing.
The post is https://thoughtbot.com/blog/rails-patch-change-the-name-of-the-id-parameter-in

Basically what it does is, if following is the routes:

    map.resources :clients, :key =&gt; :client_name do |client|
      client.resources :sites, :key =&gt; :name do |site|
        site.resources :articles, :key =&gt; :title
      end
    end

These routes create the following paths:

    /clients/:client_name
    /clients/:client_name/sites/:name
    /clients/:client_name/sites/:site_name/articles/:title

One solution is to override the `def to_param` method in the model, but I want this without touching the model itself.

But since its for Rails 2.x, how can I achieve the same for Rails 3?

**Update**

This app is using Mongoid. Not AR.
So, the gem friendly cannot be used afaik.

Change the name of the :id parameter in Routing resources for Rails

I am playing with the console, I change some model code and now I want to test it. I normally re-start the console. Is there a quicker way? Maybe a console command to reload the model code?


Content Type	Original Author	Original Content on Stackoverflow
Question	Sreeraj	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	apneadiving	View Answer on Stackoverflow

Rails - How do I check developer mode or production mode in code

Ruby on-Rails Problem Overview

Ruby on-Rails Solutions

Solution 1 - Ruby on-Rails

Save image from url with curl PHP

How do you escape strings for SQLite table/column names in Python?

Attributions