MissingMessage does not apear within a datagrid

[jaimi]

I defined an editor for a textbox within a datagrid and set a missingMessage. Sadly the missingMessage does not show up when the row is in edit-mode.
How can I fix that?

Code:

   ,{field:'ZSP_ORT',title:'Ort',width:100,sortable:'true',align:'left'
      ,editor:{ type:'textbox'
              ,options:{ required:false
			            ,prompt:'Ort...'
						,missingMessage: 'Geben Sie den Ort ein, wo die Leistungspruefung stattgefunden hat.'
					   }
	  }//editor
    }//field

[jarry]

You should set the 'required' property to true. Thus the missing message will display if the value has not been inputed.

[jaimi]

You should set the 'required' property to true. Thus the missing message will display if the value has not been inputed.

yes, I realized that. But doesn't it make sense if the missingMessage appears for all kind of input fields, regardless if it is required of not?
I'd like to give the user a hint what he should fill in at the field.

Is there any other possibility to do that?