Re: [xwiki-users] macros and lists

On 02/23/2010 10:33 AM, Stefan Bachert wrote: Macros don't speak Velocity. This should never work as you expect it to. First, velocity is executed, and $list is printed, resulting in: {{passList listX=[aha, oho] /}} Then the parameters are normalized, resulting in {{passList listX="[aha," oho]="" /}} Thus the actual result, listX = "aha[". Here velocity does not affect the macro in any way, since it does not contain any velocity code. It's important to understand that Velocity is not a central dogma in the wiki syntax anymore, it's just a scripting language that can be executed inside a {{velocity}} marker. Macros don't natively know about velocity, they don't use velocity variables in any way. So, again, velocity is executed, but this time nothing is printed, resulting in just the macro line: {{passList listX=list /}} which is normalized to {{passList listX="list" /}} and thus the "list" result. After executing velocity, this becomes: {{passList listX=aha oho /}} normalized as: {{passList listX="aha" oho="" /}} thus listX = "aha" Nothing special, listX is the string "aha|oho" I don't know how exactly this gets normalized, but it starts as: {{passList listX="[" {{passList listX="aha" oho="" /}} Normalized as {{passList listX="[aha,oho]" /}} Normalized as {{passList listX="aha,oho" /}} So, in conclusion, it's impossible to pass lists as macro parameter values, but not because it's a bug (macro parameters don't know velocity, and they don't use the same syntax), but because this is how we defined the behavior. The only workaround is to pass a string and split it in the macro code. If you think that this is an important requirement, you can propose it as an improvement of the upcoming xwiki/2.1 syntax. -- Sergiu Dumitriu http://purl.org/net/sergiu/