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i have a table

Attachments with columns

attachment_id not null,

process_id not null,

employee_id not null,

file_path not null,

file_description not null

I created a table from the attachment collection by drag and drop attachment from the Data Control

I use CreateInsert operation to add a new row in table. on createInsert button click , call managed beand method addNewAttachment

i have a button that is a follow

<af:button text="Add New attachment" disabled="#{!bindings.CreateInsert1.enabled}" id="b9" action="#{ProcessesHandler.addNewAttachment}"/>

Managed Bean method is a follwed

public String addNewAttachment() {       

    BindingContainer bindings = getBindings();

    OperationBinding operationBinding = bindings.getOperationBinding("CreateInsert1");

    operationBinding.execute();

    if (!operationBinding.getErrors().isEmpty()) {

        System.out.println("HasErrors");

        return null;

    }

    DCBindingContainer iter = (DCBindingContainer) BindingContext.getCurrent().getCurrentBindingsEntry();

    DCIteratorBinding Binding = iter.findIteratorBinding("AttachmentIterator");

    ViewObject vo = Binding.getViewObject();

    Row row = vo.getCurrentRow();

    String id = "123";

    row.setAttribute("EmpoyeeId", id);

   row.setAttribute("ProcessId", id);

    row.setAttribute("FileDesc", "File Description ");

    return null;      

}

--------------------------------------------------------or---------------------------------------------------------------

public String addNewAttachment() {           

    DCBindingContainer iter = (DCBindingContainer) BindingContext.getCurrent().getCurrentBindingsEntry();

    DCIteratorBinding Binding = iter.findIteratorBinding("AttachmentIterator");

    ViewObject vo = Binding.getViewObject();

    Row row = vo.createRow();

    String id = "123";

    row.setAttribute("EmpoyeeId", id);

    row.setAttribute("FileDesc", "File Description ");

    vo.insertRow(row);      

    return null;      

}

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when i click on button error message occour File_path is required. i want to set some of field from the method and set some filed like file_path from the view after add button is pressed

when click on button row is add to table but required field error displays. i am setting some required fields from the mehtod and want to set FilePath value form the view. this required message should not display how to handle it.