Re: NotEqual or Present?

Mon, 02 Jul 2001 21:31:19 -0700

If u have a text field on the html form . When u submit that form without entering anything in textfield then in the servlet if u try to do 
String value = request.getParameter("nameOfTextField") , u will get  value =""   and  not null 
 
So no need of setting dataObjects values to "" explicitely 
 
  
 
----- Original Message -----
Sent: Monday, July 02, 2001 8:07 PM
Subject: Re: NotEqual or Present?

We set all our values to "" in our dataObjects so the UI does not display null on the screen.  Does struts auto-convert a null to a "" for display?  If so, then we can get the getter/setters in our dataObjects (forms).
 
Matt
----- Original Message -----
Sent: Monday, July 02, 2001 12:57 PM
Subject: Re: NotEqual or Present?

 
Why not default the value to null and use the Present/NotPresent methods?
 
ie.
 
String searchParam = null;
 
<logic:present name="myForm" property="searchParam">
    show this if property "searchParam" is not present
</logic:notPresent>
 
This way, if the user never sets it, it will always be null (and notPresent).
 
----- Original Message -----
Sent: Monday, July 02, 2001 11:53 AM
Subject: Re: NotEqual or Present?

If I do this, I get the following error - it seems to go away when I put a value in value="put value or space here"
 
[02/Jul/2001 12:52:02:2] error: Exception: SERVLET-execution_failed: Error in executing servlet resourceList: java.lang.Exception: JSP Error: Setter method not provided for class org.apache.struts.taglib.logic.NotMatchTag, property class
Exception Stack Trace:
java.lang.Exception: JSP Error: Setter method not provided for class org.apache.struts.taglib.logic.NotMatchTag, property class
        at com.netscape.jsp.JSPTree.genAttributeAssignments(Unknown Source)
        at com.netscape.jsp.JSPTree.compileUserTag(Unknown Source)
        at com.netscape.jsp.JSPTree.compile(Unknown Source)
        at com.netscape.jsp.JSPTree.compileUserTag(Unknown Source)
        at com.netscape.jsp.JSPTree.compile(Unknown Source)
        at com.netscape.jsp.JSPTree.compileUserTag(Unknown Source)
        at com.netscape.jsp.JSPTree.compile(Unknown Source)
        at com.netscape.jsp.JSPTree.compileUserTag(Unknown Source)
        at com.netscape.jsp.JSPTree.compile(Unknown Source)
        at com.netscape.jsp.JSP.compile(Unknown Source)
        at com.netscape.server.servlet.jsp.JSPCompiler.JSPtoJava(Unknown Source)
        at com.netscape.server.servlet.jsp.JSPCompiler.compileJSP(Unknown Source)
        at com.netscape.server.servlet.jsp.JSPCompiler.compileOrLoadJSP(Unknown Source)
        at com.netscape.server.servlet.jsp.JSPCompiler.compileInstance(Unknown Source)
        at com.netscape.server.servlet.jsp.JSPCompiler.compileInstance(Unknown Source)
        at com.netscape.server.servlet.servletrunner.ServletRunner.createServletInfo(Unknown Source)
        at com.netscape.server.servlet.servletrunner.ServletRunner.execute(Unknown Source)
        at com.kivasoft.applogic.AppLogic.execute(Unknown Source)
        at com.kivasoft.applogic.AppLogic.execute(Unknown Source)
        at com.kivasoft.thread.ThreadBasic.run(Native Method)
        at java.lang.Thread.run(Thread.java:479)
----- Original Message -----
Sent: Monday, July 02, 2001 12:45 PM
Subject: Re: NotEqual or Present?

probably you should use match and notmatch tags
 
<logic:notmatch name="myForm" property="searchParam" value="">
    show this if property "searchParam" is not equal to ""
</logic:notEqual>
 
rama.
----- Original Message -----
Sent: Monday, July 02, 2001 11:17 AM
Subject: NotEqual or Present?

I am trying to check if the user entered a value for a search criteria in a results page.  My ActionForm sets a property to "" if the user did not enter a value.
 
So in the following code, I want to only show it if the property does not equal "".  But the following does not work, should it?
 
<logic:notEqual name="myForm" property="searchParam" value="">
    show this if property "searchParam" is not equal to ""
</logic:notEqual>
 
Thanks,
 
Matt

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