= sfPropelActAsSluggableBehaviorPlugin plugin =

This `sfPropelActAsSluggableBehaviorPlugin` plugin that automates the generation of 'slugs' based on the return value of a model method. These are useful to hide the primary key in routing requests, and make your urls look fancy.

For example, for a blog post whose title is 'A post', this behavior will fill the slug database
field with 'a_post'. If a_post exists, a_post_1 is used, and so on.

== Instalation ==

  * Install the plugin

    {{{
      symfony plugin-install http://plugins.symfony-project.com/sfPropelActAsSluggableBehaviorPlugin
    }}}
  
  * Add the slug field to your schema.yml for a desired table
  
    {{{  
    ...
    title:      varchar(255)
    slug:       varchar(255)
    ...
    }}}
  
  * Enable Propel behavior support in `propel.ini`:

    {{{
      propel.builder.AddBehaviors = true
    }}}
  
    If you have to enable the behavior support, rebuild your model:

    {{{
      symfony propel-build-model
    }}}
    
  * Enable the behavior for one of your Propel model:
  
    {{{
    #!php
    <?php
      // lib/model/ForumPost.php
      class ForumPost
      {
      }

      $columns_map = array('from'   => ForumPostPeer::TITLE,
                           'to'     => ForumPostPeer::SLUG);

      sfPropelBehavior::add('ForumPost', array('sfPropelActAsSluggableBehavior' => array('columns' => $columns_map, 'separator' => '_', 'permanent' => true)));
    }}}
    
    The ''column map'' is used by the behavior to know which columns hold information it needs :

      * from : Model column holding the string to convert. For example, the post title. ('title' by default)
      * to : Model column holding the generated string, aka slug. ('slug' by default)

    The ''separator'' parameter is used by the behavior to replace the whitespaces. ('-' by default)
    The ''permanent'' paramter is used by the behavior to avoid generating the slug when the model is updating the ''from'' column, useful for permalinks. (false by default)


== Usage ==

Every time a post is saved, the slug will be generated automatically. You can later access it
through ->getSlug() for example.