Use different configs for different environments

by stevena0
Coming from Rails, I was surprised that I couldn't find any support for multiple configuration environments in CakePHP. There were a couple of other solutions for Cake, but I found them a bit complex for what they try to achieve. Having said that, my method only supports config variables, and not database configs as yet.
So, my method works in a similar way to Rails, by using an environment variable to set the current environment (which you can set in Apache), and loading the corresponding config file.

This means you can keep your production config in version control, and not have to edit it on your live servers. You just deploy however you normally would (e.g. a source checkout), and the live config is updated - much nicer in my opinion.

To get this to work, add this to the bottom of your config/core.php:


$env = getenv('CAKE_ENV');
if (!$env){$env = 'production';}
$env = strtolower($env);
Configure::load('core-'.$env);

Then, you need to create a config file called config/core-production.php. This should overwrite any config variables that need to be different from the one in config/core.php. Here's an example:


<?php
$config
['MyConfig']['something'] = 'prod';
$config['MyConfig']['something_else'] = 'PROD';
Configure::write('Session.cookie''PROD COOKIE');

Note that you have to use Configure::write if you're overwriting things e.g. 'Session.cooke', as otherwise Cake will overwrite the whole array (in this case 'Session')

You can add as many of those config files as you like, I just have core-production.php and core-development.php.

The code above will default to the production config, so you don't need to do anything on your live servers. The final thing you need to do is to set CAKE_ENV to 'development' in your dev environment. In Apache this looks like this:


SetEnv  CAKE_ENV  development

There you go - nice and simple multiple config environments. I'll be extending this to handle database configs too, but for now that's all there is to it.

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Comments

  • mashpie posted on 08/29/10 11:02:59 AM
    if (and that might be a convention) all developers work on their local machines in a ".local" domain you don't even have to set that env variable, just prepare the debug config accoringly, ie:


    if(stristr(env('HTTP_HOST'), '.local')){
        Configure::write('debug', 1);
    }else{
        Configure::write('debug', 0);
    }

    your application should than depend on that debug settings.
  • euromark posted on 08/29/10 05:53:03 AM
    I, for instance, use private configs for each environment overriding the default ones
    this way they the "private" information contained in these files (passwords, etc) will not be in svn.

    as explained here:
    http://www.dereuromark.de/2010/08/17/development-vs-productive-setup/
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