Help needed for Struts' logic:equal

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posted 21 years ago

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Does anyone know how to use Struts' <logic:equal> tag or a link for the examples of using it?
I'm doing something like following:
<jsp:useBean id="myForm" scope="session" class="com.MyForm" />
...

<logic:equal name="myForm" property="myProperty" value="myValue" >
<bean:message key="label.myLabel" />:
</logic:equal >
myForm is an instance of MyForm bean, and myProperty is one of its properties.
When myProperty equals to myValue, the message pointed by label.myLabel in the
message resource should be printed.
When I ran the above code I got following error: No-matching extension tags
Could someone help me? Thanks.

Adam Hardy

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Posts: 567

posted 21 years ago

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Hi,
I don't recognise the error, and your logic tag seems to be OK. It looks like the error is coming from something else.
It seems strange that you are instantiating your form bean in your jsp with the useBean tag. Why don't you declare the form bean in struts-config.xml?
Otherwise, how are you sure that this error comes from the logic tag? Post the first couple of lines of the stack trace, or at least the classes that are causing the crash.

I have seen things you people would not believe, attack ships on fire off the shoulder of Orion, c-beams sparkling in the dark near the Tennhauser Gate. All these moments will be lost in time, like tears in the rain.

Chuck Lowry

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posted 21 years ago

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I've seen that message a couple of times and pulled my hair out trying to figure out what was wrong with my tags, when it actually was a problem from above the stated non-matched tag. In my case, it has usually been a missed quotation mark. Eg:
<html:text property="text1 /> <--Missed quote here
<html:select property="select1" />
<html

ption value="1">1</html

ption>
</html:select>
This may give an error like: "Non-matching tags: '</html:select>'", when the problem is actually that I missed a quote above, it ruined my opening html:select tag, and now my end tag is lonely. Also look for missed >.