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