Class **Phalcon\\Mvc\\Model\\MetaData\\Libmemcached**
=====================================================

*extends* abstract class :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

*implements* :doc:`Phalcon\\Mvc\\Model\\MetaDataInterface <Phalcon_Mvc_Model_MetaDataInterface>`, :doc:`Phalcon\\Di\\InjectionAwareInterface <Phalcon_Di_InjectionAwareInterface>`

.. role:: raw-html(raw)
   :format: html

:raw-html:`<a href="https://github.com/phalcon/cphalcon/blob/master/phalcon/mvc/model/metadata/libmemcached.zep" class="btn btn-default btn-sm">Source on GitHub</a>`

Stores model meta-data in the Memcache.  By default meta-data is stored for 48 hours (172800 seconds)   

.. code-block:: php

    <?php

    $metaData = new Phalcon\Mvc\Model\Metadata\Libmemcached(array(
    	'servers' => array(
             array('host' => 'localhost', 'port' => 11211, 'weight' => 1),
         ),
         'client' => array(
             Memcached::OPT_HASH => Memcached::HASH_MD5,
             Memcached::OPT_PREFIX_KEY => 'prefix.',
         ),
        'lifetime' => 3600,
        'prefix' => 'my_'
    ));



Constants
---------

*integer* **MODELS_ATTRIBUTES**

*integer* **MODELS_PRIMARY_KEY**

*integer* **MODELS_NON_PRIMARY_KEY**

*integer* **MODELS_NOT_NULL**

*integer* **MODELS_DATA_TYPES**

*integer* **MODELS_DATA_TYPES_NUMERIC**

*integer* **MODELS_DATE_AT**

*integer* **MODELS_DATE_IN**

*integer* **MODELS_IDENTITY_COLUMN**

*integer* **MODELS_DATA_TYPES_BIND**

*integer* **MODELS_AUTOMATIC_DEFAULT_INSERT**

*integer* **MODELS_AUTOMATIC_DEFAULT_UPDATE**

*integer* **MODELS_DEFAULT_VALUES**

*integer* **MODELS_EMPTY_STRING_VALUES**

*integer* **MODELS_COLUMN_MAP**

*integer* **MODELS_REVERSE_COLUMN_MAP**

Methods
-------

public  **__construct** ([*array* $options])

Phalcon\\Mvc\\Model\\MetaData\\Libmemcached constructor



public  **read** (*mixed* $key)

Reads metadata from Memcache



public  **write** (*mixed* $key, *mixed* $data)

Writes the metadata to Memcache



public  **reset** ()

Flush Memcache data and resets internal meta-data in order to regenerate it



final protected  **_initialize** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model, *mixed* $key, *mixed* $table, *mixed* $schema) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Initialize the metadata for certain table



public  **setDI** (:doc:`Phalcon\\DiInterface <Phalcon_DiInterface>` $dependencyInjector) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Sets the DependencyInjector container



public  **getDI** () inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns the DependencyInjector container



public  **setStrategy** (:doc:`Phalcon\\Mvc\\Model\\MetaData\\StrategyInterface <Phalcon_Mvc_Model_MetaData_StrategyInterface>` $strategy) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Set the meta-data extraction strategy



public  **getStrategy** () inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Return the strategy to obtain the meta-data



final public  **readMetaData** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Reads the complete meta-data for certain model 

.. code-block:: php

    <?php

    print_r($metaData->readMetaData(new Robots());




final public  **readMetaDataIndex** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model, *mixed* $index) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Reads meta-data for certain model 

.. code-block:: php

    <?php

    print_r($metaData->readMetaDataIndex(new Robots(), 0);




final public  **writeMetaDataIndex** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model, *mixed* $index, *mixed* $data) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Writes meta-data for certain model using a MODEL_* constant 

.. code-block:: php

    <?php

    print_r($metaData->writeColumnMapIndex(new Robots(), MetaData::MODELS_REVERSE_COLUMN_MAP, array('leName' => 'name')));




final public  **readColumnMap** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Reads the ordered/reversed column map for certain model 

.. code-block:: php

    <?php

    print_r($metaData->readColumnMap(new Robots()));




final public  **readColumnMapIndex** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model, *mixed* $index) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Reads column-map information for certain model using a MODEL_* constant 

.. code-block:: php

    <?php

    print_r($metaData->readColumnMapIndex(new Robots(), MetaData::MODELS_REVERSE_COLUMN_MAP));




public  **getAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns table attributes names (fields) 

.. code-block:: php

    <?php

    print_r($metaData->getAttributes(new Robots()));




public  **getPrimaryKeyAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns an array of fields which are part of the primary key 

.. code-block:: php

    <?php

    print_r($metaData->getPrimaryKeyAttributes(new Robots()));




public  **getNonPrimaryKeyAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns an array of fields which are not part of the primary key 

.. code-block:: php

    <?php

    print_r($metaData->getNonPrimaryKeyAttributes(new Robots()));




public  **getNotNullAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns an array of not null attributes 

.. code-block:: php

    <?php

    print_r($metaData->getNotNullAttributes(new Robots()));




public  **getDataTypes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns attributes and their data types 

.. code-block:: php

    <?php

    print_r($metaData->getDataTypes(new Robots()));




public  **getDataTypesNumeric** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns attributes which types are numerical 

.. code-block:: php

    <?php

    print_r($metaData->getDataTypesNumeric(new Robots()));




public *string* **getIdentityField** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns the name of identity field (if one is present) 

.. code-block:: php

    <?php

    print_r($metaData->getIdentityField(new Robots()));




public  **getBindTypes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns attributes and their bind data types 

.. code-block:: php

    <?php

    print_r($metaData->getBindTypes(new Robots()));




public  **getAutomaticCreateAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns attributes that must be ignored from the INSERT SQL generation 

.. code-block:: php

    <?php

    print_r($metaData->getAutomaticCreateAttributes(new Robots()));




public  **getAutomaticUpdateAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns attributes that must be ignored from the UPDATE SQL generation 

.. code-block:: php

    <?php

    print_r($metaData->getAutomaticUpdateAttributes(new Robots()));




public  **setAutomaticCreateAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model, *array* $attributes) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Set the attributes that must be ignored from the INSERT SQL generation 

.. code-block:: php

    <?php

    $metaData->setAutomaticCreateAttributes(new Robots(), array('created_at' => true));




public  **setAutomaticUpdateAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model, *array* $attributes) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Set the attributes that must be ignored from the UPDATE SQL generation 

.. code-block:: php

    <?php

    $metaData->setAutomaticUpdateAttributes(new Robots(), array('modified_at' => true));




public  **setEmptyStringAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model, *array* $attributes) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Set the attributes that allow empty string values 

.. code-block:: php

    <?php

    $metaData->setEmptyStringAttributes(new Robots(), array('name' => true));




public  **getEmptyStringAttributes** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns attributes allow empty strings 

.. code-block:: php

    <?php

    print_r($metaData->getEmptyStringAttributes(new Robots()));




public  **getDefaultValues** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns attributes (which have default values) and their default values 

.. code-block:: php

    <?php

    print_r($metaData->getDefaultValues(new Robots()));




public  **getColumnMap** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns the column map if any 

.. code-block:: php

    <?php

    print_r($metaData->getColumnMap(new Robots()));




public  **getReverseColumnMap** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Returns the reverse column map if any 

.. code-block:: php

    <?php

    print_r($metaData->getReverseColumnMap(new Robots()));




public  **hasAttribute** (:doc:`Phalcon\\Mvc\\ModelInterface <Phalcon_Mvc_ModelInterface>` $model, *mixed* $attribute) inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Check if a model has certain attribute 

.. code-block:: php

    <?php

    var_dump($metaData->hasAttribute(new Robots(), 'name'));




public  **isEmpty** () inherited from :doc:`Phalcon\\Mvc\\Model\\MetaData <Phalcon_Mvc_Model_MetaData>`

Checks if the internal meta-data container is empty 

.. code-block:: php

    <?php

    var_dump($metaData->isEmpty());