Some tutorials on the internet recommend setting a variable $Integer to the constant of 0 and then calling parseInt method on it like this:
| Code Block |
|---|
| theme | DJango |
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| language | html/xml |
|---|
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#set ($Integer = 0)
#if ($parameters.get("ItemsPerPage"))
#set ($ItemsPerPage = $Integer.parseInt($parameters.get("ItemsPerPage")))
#else
#set ($ItemsPerPage = 6)
#end |
The problem is that $Integer.parseInt won't handle bad input gracefully. Instead the proper way to code this type of logic is:
| Code Block |
|---|
| theme | DJango |
|---|
| language | html/xml |
|---|
|
#set ($ItemsPerPage = 6)
#if ($formatHelper.parseInteger($parameters.get("ItemsPerPage")))
#set ($ItemsPerPage = $formatHelper.parseInteger($parameters.get("ItemsPerPage")))
#if ($ItemPerPage < 1 || $ItemPerPage > 50)
#set ($ItemsPerPage = 6)
#end
#end |
...