Struts2 Jquery Grid

i have used Struts2 Jquery Grid and my grid is having some Rows in which there are some usernames ,开发者_JS百科 passwords and so on, if i am adding any duplicate username it is allowing me to add the duplicate username, i want to know if there is a way which will warn me that there is a user with the same username.

I had the same requirement, but there's no direct way of doing it, but I found something useful looking in the source code of the plugin and here is what I did.

GRID

 navigatorAddOptions="{
              reloadAfterSubmit:true,
              afterSubmit:function(response,postdata){
              return isError(response.responseText);
              }
              }"

javascript

 <script type="text/javascript">
    function isError(text){
        //            document.getElementById("errorpara").innerHTML=text;
        if(text.indexOf('ERROR')>=0){
            return [false,text];
        }
        return [true,''];
    }
</script>

in struts.xml

 <result name="error">/x.jsp</result>

x.jsp

<%@taglib prefix="s" uri="/struts-tags" %>
<s:actionerror/>
<s:actionmessage/>
<s:fielderror/>

in the action

addActionError("ERROR: Username already exists!");
                return ERROR;

So here the add/edit dialog box of grid shows up the error.

No. This is a business requirement you have and you need to incorporate it yourself. You could have a constraint at table level and catch the particular constraint violation exception, to be shown on screen any way you desire.