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The following page has been changed by JeffBeal: http://wiki.apache.org/struts/ActionErrorsAndActionMessages The comment on the change is: Added link to page explaining html:errors and html:messages ------------------------------------------------------------------------------ The difference between saveErrors(...) and saveMessages(...) is simply the attribute name under which the ActionMessages object is stored, providing two convenient default locations for storing controller messages for use by the view. If you look more closely at the html:errors and html:messages tags, you can actually use them to get an ActionMessages object from any arbitrary attribute name in any scope. - While we're clarifying, the difference between html:errors and html:messages is purely in syntax and model -- both tags *default* to look for an ActionMessages object under [http://jakarta.apache.org/struts/api/org/apache/struts/Globals.html#ERROR_KEY Globals.ERROR_KEY] despite the difference in names. I wasn't part of the history, but I'm assuming that around the same time that people were realizing that there's more than one kind of message to pass, they also realized that sometimes you want more flexibility in displaying them. html:messages provides more flexibility at the cost of more typing. + While we're clarifying, the difference between html:errors and html:messages is purely in syntax and model -- both tags *default* to look for an ActionMessages object under [http://jakarta.apache.org/struts/api/org/apache/struts/Globals.html#ERROR_KEY Globals.ERROR_KEY] despite the difference in names. I wasn't part of the history, but I'm assuming that around the same time that people were realizing that there's more than one kind of message to pass, they also realized that sometimes you want more flexibility in displaying them. html:messages provides more flexibility at the cost of more typing. Niall Pemberton has posted more + [http://www.niallp.pwp.blueyonder.co.uk/HelpTagsErrorsAndMessages.html details] on the differences between html:messages and html:errors on his website. I hope this helps to clarify things. I would strongly encourage people to have a look inside the Struts source code, as it's really quite clear when you look under the hood. You can see what happens in validation by examining the "processValidate" method in RequestProcessor: http://cvs.apache.org/viewcvs.cgi/jakarta-struts/src/share/org/apache/struts/action/RequestProcessor.java?view=markup @@ -23, +24 @@ http://cvs.apache.org/viewcvs.cgi/jakarta-struts/src/share/org/apache/struts/taglib/html/MessagesTag.java?view=markup http://cvs.apache.org/viewcvs.cgi/jakarta-struts/src/share/org/apache/struts/taglib/html/ErrorsTag.java?view=markup - --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
