sfEntityAttributeValuePlugin
=============================

The `sfEntityAttributeValuePlugin` is a symfony plugin that allows use of the [Entity-Attribute-Value](http://en.wikipedia.org/wiki/Entity-attribute-value_model) 
data-model as a doctrine behavior.

This plugin provides a way to easily create dynamic fields with [jQuery Form Builder Plugin](http://www.botsko.net/blog/2009/04/jquery-form-builder-plugin/)
and bind then to a specific object (DB line) of your model. It also allow you 
to fill in these fields from other models that have a ManyToOne relation with 
the first one. And finally, these stored EAV can be exploited in edit/read mode.


Installation
------------

  * Install the plugin

        $ symfony plugin:install sfEntityAttributeValuePlugin 

  * Activate the plugin in your project configuration file (in config/ProjectConfiguration.class.php).

        class ProjectConfiguration extends sfProjectConfiguration
        {
            public function setup()
            {
                //...
                $this->enablePlugins('sfEntityAttributeValuePlugin');
            }
        }

  * Apply the EAV behavior to your model in your schema file `config/doctrine/schema.yml` , ie:
    Assume that we want to bind dynamic fields to each object of a model called "ParentModel" and then 
    insert data in these fields from a 'ChildModel' who is related as ManyToOne to the "ParentModel", the schema
    will contain config like this:

        ParentModel:
          actAs: 
            EavBehavior:       
              mode: create
            columns:
              ...

        ChildModel:
          actAs: 
            EavBehavior:       
              mode: insert
              parent_resource: ParentModel
            columns:
              parent_model_id:            { type: integer }
              ...
          relations:
            ParentModel:                  { local: parent_model_id, foreign: id }

  * Build Eav models and create tables :
  
        $ symfony doctrine:build --all

    alternatively you could build the models, the sql, then run the sql manually

  * Build (or update) the global resource file to affect unique id for all your models
        
        $ symfony eav:init-config
    
    Important note: this task will create/update the file resources.yml that hold the 
    models ids, do not change manually this files, this may damage your EAV structure!
  
  * Activate the "eav" module in the settings.yml:

        all:
          .settings:
            enabled_modules: [ default, eav ]

  * publish assets
        
        $ symfony plugin:publish-assets

  * Clear your cache

        $ symfony cc
        
  * Add the sfWidgetFormEav as a widgetSchema in all forms that have the EavBehavior. The sfEntityAttributeValuePlugin
  is enough smart to render the widget in create or insert mode.
  
        # lib/form/doctrine/ParentModelForm.php
        class ParentModelForm extends BaseParentModelForm
        {
            public function configure()
            {
                $this->widgetSchema['eav'] = new sfWidgetFormEav($this);
            }
        }
        
        # lib/form/doctrine/ChildModelForm.php
        class ChildModelForm extends BaseChildModelForm
        {
            public function configure()
            {
                $this->widgetSchema['eav'] = new sfWidgetFormEav($this);
            }
        }

  * Add the widget "eav" in the form partial 

        # _form.php
        echo $form['eav']-> renderRow();

(future improvements)

Ajax eav child binder: when editing a child entity, eav structure will be updated via Ajax.
----------------------
Smart EAV tables cleaner: to clean obsolete data from  eav tables.
-------------------------
Required Field support
----------------------
Sortable EAV
------------