What actions should a controller perform in MVC when processing a request to create a new object?

In an MVC controller, when processing a request to create a new object, the following actions are usually performed:

1. Receive data from the request (for example, from the body of a POST request).
2. Validate the input data, checking its correctness.
3. Call the service layer or interact directly with the model to create a new object.
4. Handle possible errors (such as constraint violations or validation errors).
5. Formulate a response to the client, for example, confirming successful creation or with an error message.

Example in Java using Spring MVC:

@PostMapping("/items")
public ResponseEntity<Item> createItem(@RequestBody @Valid ItemDto itemDto) {
    Item newItem = itemService.create(itemDto);
    return new ResponseEntity<>(newItem, HttpStatus.CREATED);
}

Here, the controller accepts a DTO, validates it, calls the service to create, and returns the created object with a 201 status code.