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Session Variable Understanding

Posted on 2000-03-15
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Last Modified: 2013-12-24
I am guessing I just don't understand something about session variables so bear with me.

In an APPLICATION.CFM files I set the <CFAPPLICATION> tag and identify the SESSIONMANAGEMENT as on.

Then, in that same file, I create a few session variables (like session.firstname, session.lastname...you get the idea) and default them all to "" to start off with.

Later, in a login page, I confirm a user name and password against a database, retrieve information from that record and place that data into the session variables.  Which works fine (confirmed with a subsequent page for testing by outputting the session variables).

However, and this is where I think I don't fully understand the session object, when I return to the home page, I have an if clause that checks, for example, session.firstname to see if it is set to "".  If it is, I say "Welcome", if it is not I way "Welcome " #session.firstname#.   But it never seems to work...like there is a scoping issue with the session variable I defined.

Is that enough to get a solution to this misunderstanding?

Thanks in advance.  By the way, I have looked at some of Forta's books and while I find some information about sessions I don't seem to find anything that really talks about how to use them appropriately.
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Question by:beregoth
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3 Comments
 
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by:cheekycj
ID: 2622070
don't check if Session.firstname = "" check if it is defined.

<CFIF IsDefined("session.firstname")>

</CFIF>

Does that help?

CJ
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cheekycj earned 50 total points
ID: 2622072
don't check if Session.firstname = "" check if it is defined.

<CFIF IsDefined("session.firstname")>

</CFIF>

that should help.

CJ
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Author Comment

by:beregoth
ID: 2622092
Thanks...that more or less answered my question.  I think I need to better understand how to set and get information to and from the session object itself.  I do, however, thank you for the advice.
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