Question

i am using a modular architecture with Zend framework, and i want to use the module specific database configuration such that each module’s model employs its own database configuration.

This is my sample application architecture:

• application
  • modules
    • admin
      • controllers
      • models
        • DbTable
          • Users.php
      • views
      • configs
        • module.ini
  • configs
    • application.ini

From the above architecture, i have the module “admin” and i have specified its database configuration in admin/configs/module.ini like:

resources.db.adapter = "pdo_mysql" 
resources.db.params.host = "localhost" 
resources.db.params.username = "*****" 
resources.db.params.password = "*****" 
resources.db.params.dbname = "********"

Now I want to use this configuration in the models of “admin” module.

FYI, Iam instantiating the model in the “admin” module’s controller like:

$admin = new Admin_Models_DbTable_Users();
$admin_users = $admin->fetchUsers();

And in the “admin” module’s model, i am executing the queries like:

public function fetchUsers()
{
$sql = "select * from users";
return $this->getAdapter()->fetchAll($sql, array(), Zend_Db::FETCH_OBJ);
}

How can i load the database configuration in admin/configs/module.ini in my “admin” module’s database adapter such that it uses that configuration? Do i need to use Zend Registry or set any options in admin module’s bootstrap file ?

Answer 1

i am following a different approach, as suggested by one of my friends:

In the module’s bootstrap file, i am setting the module’s db adapter into the Registry, and in the module’s model file, i am getting the module’s db adapter from the registry using a custom method: getAdapter()

Code in ….application/modules/admin/Bootstrap.php

protected function _initAutoload()
    {       
        $configuration = new Zend_Config_Ini(
                APPLICATION_PATH . '/modules/admin/configs/module.ini', 
                'production'
                );

        $params = $configuration->resources->db->params->toArray();
        $DB = new Zend_Db_Adapter_Pdo_Mysql($params);

        Zend_Registry::set('DB',$DB);       

    }

Code in …application/modules/admin/DbTable/Users.php

public function getAdapter()
    {   
        $registry   = Zend_Registry::getInstance();     
        return $registry['DB']; 
    }

So now the $this->getAdapter() in admin module’s fetchUsers() method will have the db adapter of “admin” module. 🙂