J M Okomba wrote:
>
> I call rsv_info.getField("info_type") because I need to use the value
> returned. It's not for display purposes.
>
> Since I call rsv_info.getField("info_type") in the <db:body> tag I thought
> dbform should not execute the <db:body> tag if there are no records returned
> (and hence resultsetVector is null) or if it must execute <db:body> for some
> reasons then I expect to get a null value when I call
> rsv_info.getField("info_type") instead of an exception.
What about the allowNew attribute? Have you checked that? If that is set to true,
the body will be executed once. You did not answer that.
Current it is:
- if rsv_info == null: there is no result row
- if rsv_info != null and rsv_info.getField("ff") == null :
there is a row and the value for column "ff" is null
That makes it possible to handle both cases differently. This is what you can
do:
1) set allownew="true", don't use scripting vars, use labels instead
2) set allownew="false", use scripting vars
3) set allownew="true", use scripting vars, but check for nulls yourself:
<% String type = (rsv_info == null) ? null : rsv_info.getField("info_type"); %>
Btw. there might be programs where people use current behaviour:
<% if (rsv_info == null) { %>
// do something in case of empty result set...
<% } else { %>
// do something in case of rows found
<% } %>
If we would change that, we would not introduce new functionality, but take
away old one and break compatibility with old applications.
Regards
Dirk
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