How does EAV data storage work in Magento 2?
EAV (Entity-attribute-value) is a model of storing the values of entity attributes in a certain data storage. As a data storage, Magento 2 supports MySQL-compatible databases (like MySQL, MySQL NDB Cluster, MariaDB, Percona and others). A table of the classical EAV model has 3 columns:
What does entity attribute value mean in Magento?
In common sense, Entity Attribute Value model is a data model to describe entities where the number of attributes (properties and parameters) which can be used to describe them are potentially vast, but the number of attributes which will actually apply to a given entity are relatively modest.
How are extension attributes used in Magento 2?
Objects that use EAV attributes typically store values in several MySQL tables. The Customer and Catalog modules are the primary models that use EAV attributes. Other modules, such as ConfigurableProduct, GiftMessage, and Tax, use the EAV functionality for Catalog. Extension attributes. Extension attributes are new in Magento 2.
When to use a collection type in Magento?
A collection is a Model type containing other Models, it is frequently used in Magento to handle product lists (i.e. from a category or a bundle option). Use this to explain how Magento implements a collection by looking at code in a model, so that people can learn to write their own collections
How is Magento cataloginventory treated as a third party extension?
CatalogInventory is treated as a “third-party extension”. Access to the inventory data is restricted because the quantity of in-stock item may be competitive information. In this example, the stock_item attribute is restricted to only the users who have the Magento_CatalogInventory::cataloginventory permission.
How to add a filter to a Magento collection?
I’ce got emty set. 2) Add attribute filter to collection vendor/magento/module-eav/Model/Entity/Collection/AbstractCollection::addAttributeToFilter (): If $attribute is an array, it will add OR condition with the following format: