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Hide label if there are no parameters set in template. (Parser functions)

I have an infobox like this

{{Infobox
|name   = {{{name}}}
|status = {{{status}}}
|-
|! style="text-align:center; color:white; font-size:1.4em; line-height:1.3em; background:#827f75" colspan="2" {{!}}Contacts
|-
{{#if:{{{Person1|}}}|
{{!}} Person1
{{!}} {{{Person1}}}
|-
{{#if:{{{Person2|}}}|
{{!}} Person2
{{!}} {{{Person2}}}
}}

The issue I have is that the label "Contacts" will be visible even if there's no parameter set for "Person1" or "Person2". This is what i've attempted.

{{#if:{{{Person1}}} or {{{Person2}}}|
{{!}} style="text-align:center; color:white; font-size:1.4em; line-height:1.3em; background:#827f75" colspan="2" {{!}}Contacts
}}

This does however not work for some reason, it always prints out the label as if the statement is always true.

Solution

  • if evaluates the true branch if the condition is not empty and vice versa. At the same time {{{parameter}}} evaluates to the same string ("{{{parameter}}}") if this parameter wasn't supplied. In order for it to be evaluated to empty string, you need to provide an empty default value: {{{parameter|}}}. Also, or is neither needed nor helpful here, so the resulting expression should be:

    {{#if:{{{Person1|}}}{{{Person2|}}}

    or 

    {{#if:{{{Person1|{{{Person2|}}}}}}

    For more information, see: