presence
Check if an input has been filled in or checked.
For example when a title must be entered:
<input type="text" id="title" name="title" value="" />
{% validate id="title" type={presence} %}
Extra arguments:
| Argument | Description | Example |
| failure_message | Message to be shown when field is empty. Defaults to "*" | failure_message="Please enter." |
This page is part of the Zotonic documentation, which is licensed under the Apache License 2.0.