How to use Repository Pattern in Magento 2?

Magento 2 is purely an eCommerce tool, which comes with powerful and flexible features. The performance of Magento 2 is greatly improved because it uses the repository pattern for all CRUD(Create, Read, Update & Delete) operations. All the CRUD operations are now performed in the repository.
Repository pattern has changed the process of fetching data from the end user and saving back into the database file, which has resulted in an easy understanding of the code.
Let’s see more about the Repository pattern in details.

What is Repository pattern?
Repository pattern is the design pattern that allows us to separate the business logic  & data retrieval code. It’s responsible for reading and writing the information from design pattern and storing it back into the database, a file or physical memory. It sets the programmers free from losing data due to any problem and makes its best use in the business environment.
Let’s see what is the meaning of the code separation in between the business logic and data retrieval.
For example, Magento Review extension, it allows the users of an online store to review different products and submit their feedback. It includes the data model and a repository to perform the entire function. If these two are not separated, then the functionality may take more time to load and complete.

Are there any benefits of using the Repository pattern?
Repository pattern is quite useful for the developer and end user as well. The most important benefit is the separation of the data model from the business logic. With this, we can achieve clean code, which ensures the developers/programmers to easily read and modify the code. Another thing that comes in handy here is, when we want to find the particular code.
Because of the separation of the database from business logic, it allows the developers to alter the code after quick understandings. The queries in the database are treated isolated. Hence the modification in the database will not affect the rest of the code that depends on the database.
One more thing comes in handy for developer and tester, the code is easy to test at least the business part. All the queries are isolated to the repository object so it makes easier to swap it during the testing and user preconfigured data set.

How does this work in Magento?
You can use the repository pattern in Magento by using below code to load data of the particular id from the model.

// Retrieve data from persistent storage
$model = $modelRepository->loadById($id);
// Retrieve data from model
$name = $model->getName();
// Change data on model
$model->setActive(true);
// Save the changes
$modelRepository->save($model);

In above code, loading and saving operation is done through the repository.

Conclusion: Although the isolation of data retrieval from the business logic seems to be quite beneficial for Magento 2, it makes hard to achieve the lazy loading. Consider the situation, where you load a model and it triggers all the data to load that we don’t even need. Overall, the repository pattern is quite useful for Magento as it makes the developers, programmers, and eCommerce development agencies to customize the code, continue with hassle-free testing, and pursue a well-built end product. That's all, For further research follow documentation link below.

• Magento service contracts – service contracts
• Magento data interfaces – data interfaces

Thanks For Reading!