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custom tag SetProperty: Mandatory attribute property missing

 
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Ok, first some code. Here's the contents of my displayCollection.tag:


Here's the JSP I'm calling it from (myq.jsp):


Here's the java class for irCollection (used in the tag file):


And finally, here's the error I get when i try to run myq.jsp:

org.apache.jasper.JasperException: /WEB-INF/tags/displayCollection.tag(7,2) SetProperty: Mandatory attribute property missing
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:41)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:198)
org.apache.jasper.compiler.JspUtil.checkAttributes(JspUtil.java:174)
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:595)
org.apache.jasper.compiler.Node$SetProperty.accept(Node.java:1150)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:647)
org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1182)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
org.apache.jasper.compiler.Node$Root.accept(Node.java:475)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1789)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:216)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:372)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:352)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:339)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:594)
org.apache.jasper.servlet.JspServletWrapper.loadTagFile(JspServletWrapper.java:231)
org.apache.jasper.compiler.TagFileProcessor.loadTagFile(TagFileProcessor.java:577)
org.apache.jasper.compiler.TagFileProcessor.access$000(TagFileProcessor.java:48)
org.apache.jasper.compiler.TagFileProcessor$TagFileLoaderVisitor.visit(TagFileProcessor.java:642)
org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1539)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
org.apache.jasper.compiler.Node$Root.accept(Node.java:475)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.TagFileProcessor.loadTagFiles(TagFileProcessor.java:660)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:228)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:372)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:352)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:339)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:594)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:344)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)



as far as I can tell, the attribute mgr is set in myq.jsp when it invokes displayCollection.tag, and displayCOllection.tag's only attribute (required) is mgr. so uhm... what do I misunderstand?
 
Charessa Reilly
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edited to correct a typo i made during code copy/paste
 
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I'd say the error is pretty clear. You omitted a required attribute.
 
Charessa Reilly
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yes, but, WHAT attribute? There's only one attribute in the tag "mgr" and I set that, didn't I?
 
Bear Bibeault
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It's not complaining about your tag, but the setProperty tag on line 7. Actually read the error message:

org.apache.jasper.JasperException: /WEB-INF/tags/displayCollection.tag(7,2) SetProperty: Mandatory attribute property missing

 
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The setProperty tag has three attributes

1) name: value that matches the id of the useBean tag
2) property: the name of the bean's property to set
3) value: the value to set

You combined the name and property value into one attribute. It does not like when you do that.
 
Bear Bibeault
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P.S. I'd recommend following established conventions and starting class name with a capital letter.
 
Charessa Reilly
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thanks, Mike. I knew it would be newbie, but I didn't know where I was falling.
 
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