Page blueprint with conditional tab

Support Forms & Blueprints
4

@unmick,

Is it possible?
From the docs:

The conditional field type is used to conditionally display some other fields base on a condition.

The term “fields” is quite ambiguous, but my first interpretation is “input fields” which excludes “tabs”.

The final verdict might be given by the Grav-team…

Alternative ‘conditional’ approach:
You didn’t share the intention of using a ‘conditional tab’, so maybe the following alternative might not work in your use-case.

You could display a tab conditionally by conditionally publishing the overriding blueprint.

Usually a plugin publishes its blueprints in the event onPageGetBlueprints. E.g.:

public function onGetPageBlueprints(Event $event) {
   $types = $event->types;
   $types->scanBlueprints('plugin://' . $this->name . '/blueprints');
}

To publish the blueprint conditionally you could:

  • Subscribe to event onPageGetBlueprints only when condition is met.
    if ($condition) {
    $this->enable([
       'onGetPageBlueprints' => ['onGetPageBlueprints', 0],
    ]);
}
  • Or you could wrap the code inside onPageGetBlueprints with an if-statement:
    public function onGetPageBlueprints(Event $event) {
   if ($condition) {
      $types = $event->types;
      $types->scanBlueprints('plugin://' . $this->name . '/blueprints');
   }
}

IMHO, this approach is much cleaner and less error-prone than messing around in YAML form definitions.