Module:Params/doc/examples/check for unknown parameters: Difference between revisions
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<includeonly>{{#ifexpr:{{#invoke:params|discarding|hello|discarding|wind|count}} > 0 | |||
|{{Error|Error: The only parameters accepted are {{para|hello}} and {{para|wind}}.}} | |||
|Everything is good: do something | |||
}}</includeonly><noinclude>{{Documentation|heading=[[File:Test Template Info-Icon - Version (2).svg|50px|alt=|link=]] Template documentation}}</noinclude> | |||
Revision as of 06:47, 9 March 2025
This example template shows to use {{#invoke:params|discarding|...}} to check for unknown parameters.
Usage
For instance, writing
{{module:params/doc/examples/check for unknown parameters
| hello = world
| wind = surfing
}}will generate
- Everything is good: do something
while writing
{{module:params/doc/examples/check for unknown parameters
| hello = world
| wind = surfing
| wrong = ups!
}}will generate
- Error: The only parameters accepted are
|hello=and|wind=.
For simple cases like this specialized modules are available; you might want to have a look at:
- {{#invoke:Check for unknown parameters|check}}
- {{#invoke:Check for deprecated parameters|check}}
- {{#invoke:Check for clobbered parameters|check}}
- {{#invoke:Parameter validation|validateparams}}
- {{#invoke:TemplatePar|valid}}