3. ModelService

ModelService manages the lifecycle of the models themselves, not just the data.

register(Model model)

• Function: Registers a new dynamic model at runtime.
• Scenario: User defines a new "Form" in the UI -> You create a Model object -> Register it -> Framework creates the table.

update(Model model)

• Function: Updates the database schema (DDL) to match the provided model.
• Behavior:
  • Adds missing columns.
  • Updates column types/comments.
  • Creates/Updates indexes.
  • Safe: It generally does not drop columns to prevent data loss.

getDataManager(Class<?> entityClass)

• Function: The factory method to get the DataManager for your business logic.
• Example:

  DataManager<Long> dm = modelService.getDataManager(Product.class);
  dm.insert(new Product("Phone"));
  

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