Extjs model data entity model

1. extjs Data Model Basics

Three important types of extjs data packets: Model (data entity model), store (data set), and proxy (Data proxy)

The data model of extjs mainly includes:

• Data entity model: Model

  
  

  The data entity model represents the data entity used in the application system.

• Data Proxy: proxy

• Data reader: reader and writer

  The data reader is used to read the original data to the model data entity model, or format the model data entity model to the specified data format.

• Dataset: Store

A dataset is a client cache that stores Model objects. It provides data filtering, sorting, and searching functions. It is often used for data interfaces of data models and UI components.

2. model data entity model

Four important components of the model data entity model class:

• Fields: Field Definition
• Proxy: Data proxy
• Associations: Model Association
• Validations: data verification