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139
More/EAV/README.rst
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@ -1,87 +1,97 @@
`Entity-Attribute-Value (EAV)`__
================================
The Entity–attribute–value (EAV) pattern in order to implement EAV model with PHP.
Purpose
-------
...
The Entity–attribute–value (EAV) model is a data model to describe entities
where the number of attributes (properties, parameters) that can be used
to describe them is potentially vast, but the number that will actually apply
to a given entity is relatively modest.
Examples
--------
```
use DesignPatterns\More\EAV\Entity;
use DesignPatterns\More\EAV\Attribute;
use DesignPatterns\More\EAV\Value;
Check full work example in `example.php`_ file.
// color attribute
$color = (new Attribute())->setName('Color');
// color values
$colorSilver = (new Value($color))->setName('Silver');
$colorGold = (new Value($color))->setName('Gold');
$colorSpaceGrey = (new Value($color))->setName('Space Grey');
.. code-block:: php
// memory attribute
$memory = (new Attribute())->setName('Memory');
// memory values
$memory4Gb = (new Value($memory))->setName('4GB');
$memory8Gb = (new Value($memory))->setName('8GB');
$memory16Gb = (new Value($memory))->setName('16GB');
use DesignPatterns\More\EAV\Entity;
use DesignPatterns\More\EAV\Attribute;
use DesignPatterns\More\EAV\Value;
// storage attribute
$storage = (new Attribute())->setName('Storage');
// storage values
$storage128Gb = (new Value($storage))->setName('128GB');
$storage256Gb = (new Value($storage))->setName('256GB');
$storage512Gb = (new Value($storage))->setName('512GB');
$storage1Tb = (new Value($storage))->setName('1TB');
// Create color attribute
$color = (new Attribute())->setName('Color');
// Create color values
$colorSilver = (new Value($color))->setName('Silver');
$colorGold = (new Value($color))->setName('Gold');
$colorSpaceGrey = (new Value($color))->setName('Space Grey');
// entities
$mac = (new Entity())
->setName('MacBook')
// colors
->addValue($colorSilver)
->addValue($colorGold)
->addValue($colorSpaceGrey)
// memories
->addValue($memory8Gb)
// storages
->addValue($storage256Gb)
->addValue($storage512Gb)
;
// Create memory attribute
$memory = (new Attribute())->setName('Memory');
// Create memory values
$memory4Gb = (new Value($memory))->setName('4GB');
$memory8Gb = (new Value($memory))->setName('8GB');
$memory16Gb = (new Value($memory))->setName('16GB');
$macAir = (new Entity())
->setName('MacBook Air')
// colors
->addValue($colorSilver)
// memories
->addValue($memory4Gb)
->addValue($memory8Gb)
// storages
->addValue($storage128Gb)
->addValue($storage256Gb)
->addValue($storage512Gb)
;
// Create storage attribute
$storage = (new Attribute())->setName('Storage');
// Create storage values
$storage128Gb = (new Value($storage))->setName('128GB');
$storage256Gb = (new Value($storage))->setName('256GB');
$storage512Gb = (new Value($storage))->setName('512GB');
$storage1Tb = (new Value($storage))->setName('1TB');
// Create entities with specific values
$mac = (new Entity())
->setName('MacBook')
// colors
->addValue($colorSilver)
->addValue($colorGold)
->addValue($colorSpaceGrey)
// memories
->addValue($memory8Gb)
// storages
->addValue($storage256Gb)
->addValue($storage512Gb)
;
$macAir = (new Entity())
->setName('MacBook Air')
// colors
->addValue($colorSilver)
// memories
->addValue($memory4Gb)
->addValue($memory8Gb)
// storages
->addValue($storage128Gb)
->addValue($storage256Gb)
->addValue($storage512Gb)
;
$macPro = (new Entity())
->setName('MacBook Pro')
// colors
->addValue($colorSilver)
// memories
->addValue($memory8Gb)
->addValue($memory16Gb)
// storages
->addValue($storage128Gb)
->addValue($storage256Gb)
->addValue($storage512Gb)
->addValue($storage1Tb)
;
$macPro = (new Entity())
->setName('MacBook Pro')
// colors
->addValue($colorSilver)
// memories
->addValue($memory8Gb)
->addValue($memory16Gb)
// storages
->addValue($storage128Gb)
->addValue($storage256Gb)
->addValue($storage512Gb)
->addValue($storage1Tb)
;
```
UML Diagram
-----------
...
.. image:: uml/uml.png
:alt: EAV UML Diagram
:align: center
Code
----
@ -110,5 +120,6 @@ Tests/ValueTest.php
:linenos:
.. _`example.php`: https://github.com/domnikl/DesignPatternsPHP/tree/master/More/EAV/example.php
.. _`GitHub`: https://github.com/domnikl/DesignPatternsPHP/tree/master/More/EAV
.. __: https://en.wikipedia.org/wiki/Entity–attribute–value_model

14
More/EAV/example.php
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@ -6,29 +6,29 @@ use DesignPatterns\More\EAV\Entity;
use DesignPatterns\More\EAV\Attribute;
use DesignPatterns\More\EAV\Value;
// color attribute
// Create color attribute
$color = (new Attribute())->setName('Color');
// color values
// Create color values
$colorSilver = (new Value($color))->setName('Silver');
$colorGold = (new Value($color))->setName('Gold');
$colorSpaceGrey = (new Value($color))->setName('Space Grey');
// memory attribute
// Create memory attribute
$memory = (new Attribute())->setName('Memory');
// memory values
// Create memory values
$memory4Gb = (new Value($memory))->setName('4GB');
$memory8Gb = (new Value($memory))->setName('8GB');
$memory16Gb = (new Value($memory))->setName('16GB');
// storage attribute
// Create storage attribute
$storage = (new Attribute())->setName('Storage');
// storage values
// Create storage values
$storage128Gb = (new Value($storage))->setName('128GB');
$storage256Gb = (new Value($storage))->setName('256GB');
$storage512Gb = (new Value($storage))->setName('512GB');
$storage1Tb = (new Value($storage))->setName('1TB');
// entities
// Create entities with specific values
$mac = (new Entity())
->setName('MacBook')
// colors