[WW-5046] Validation framework won't work when running a method named input() in an Action class

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 2.3.37
• Component/s: Core Actions
• Labels: easyfix

Environment

Windows 10

Struts 2.3.37

Eclipse Oxygen

Tomcat 9.0.24

• Flags: Important
• Assignee: Unassigned
• Reporter: Ivan Shih
• Created: 13/Nov/19 02:32
• Updated: 13/Nov/19 06:01
• Resolved: 13/Nov/19 06:01

Description

When running a method named input() in an Action class, the build-in validation framework won't work, i.e., the validation messages doesn't get displayed, no validation function is performed:

BookAction Class with a method named input() :

public class BookAction extends ActionSupport implements ModelDriven<Book> {
    private Book book = new Book();
    @Override public Book getModel() {
        return book; 
    }

    public String input() {
        return SUCCESS;
    }	    
}

 Book Class:

public class Book {	
    private String isbn;
    // get and set method
    ...
}

 

BookAction-validation.xml:

 

<validators>	
  <validator type="requiredstring">
    <param name="fieldName">isbn</param>     
    <message>ISBN is empty!!!</message>
  </validator>
</validators>

 

Results:

The build-in validation framework won't work, i.e., the validation messages doesn't get displayed, no validation function is performed.

 

How to Fix:

Changing the method name to inputs() or else in BookAction Class :

public class BookAction extends ActionSupport implements ModelDriven<Book> {
    private Book book = new Book();
    @Override public Book getModel() {
        return book; 
    }
    // Changing the method name to inputs() or else fix the issue
    public String inputs() {
        return SUCCESS;
    }	    
}