thinkphp's mvvc has no model

In Web development, MVC (Model-View-Controller) is a very common architecture. In the MVC architecture, the model is a core component of data processing, which handles data access, data verification and other operations. However, in the MVC system of the PHP framework ThinkPHP, there is an MVVC (Model-View-Validation-Controller) architecture without a model. This has caused doubts among some developers. This article will analyze the implementation principles of ThinkPHP's MVVC architecture and why MVVC without a model can also adapt to Web development.

MVVC (Model-View-Validation-Controller) is the default architecture of ThinkPHP. Compared with the MVC architecture, it adds a new Validation layer based on MVC. The Validation layer is responsible for implementing data validation functions, including data form submission, illegal input detection, verification of form fields and values, etc. In this way, the Controller can focus on the business logic, while Validation ensures the validity and security of the data. At the same time, ThinkPHP's MVVC architecture uses a single entrance, which makes the entire system easier to manage and maintain.

Regarding the lack of a model, ThinkPHP’s design philosophy is to make the Model’s responsibilities as simple as possible and only be responsible for interacting with the database. The business logic is handled by the Controller. The advantage of this is that the model is no longer just a storage interface for persisting and querying data, these tasks can also be completed by other components. Separating the business logic into the Controller can better decouple the two and make the code easier to maintain and expand.

ThinkPHP's MVVC architecture uses ORM (Object-Relational Mapping) to implement database interaction, which makes database operations simpler and more efficient. When using ORM, database tables can be mapped to objects, which allows developers to no longer have to pay attention to SQL statements and database connections when writing code, making the code more concise and elegant, while also preventing security issues such as SQL injection. In ThinkPHP, ORM is very powerful. It not only supports relational databases such as MySQL, PostgreSQL, etc., but also supports document databases such as MongoDB. In addition, ORM also supports functions such as caching and lazy loading, which can better improve application performance.

Of course, for many developers, the fact that there is no model is still an difficult fact to accept. Because the model can provide comprehensive data processing functions, including data verification, data logical processing, data association, etc. In some complex systems, these functions are essential. But in fact, ThinkPHP's MVVC architecture also provides some ways to deal with these needs. For example, for data verification and logical processing, you can customize rules and validators in the Validation layer, and for data association, you can use ORM's associated query implementation.

In general, ThinkPHP's MVVC architecture is a very excellent Web development architecture. It adds a Validation layer based on the MVC architecture to make Web applications more secure and reliable. Although the lack of a model may confuse some developers, in fact the functions provided by the model can also be achieved using methods such as ORM and custom validation rules. Removing the model can make the code more efficient, concise, easy to maintain and expand.

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