Mryntu

It is possible to add 2 depedencies to 1 field?

Like this?

->addFieldMap($field_to_evaluate->getHtmlId(), $field_to_evaluate->getName())
->addFieldMap($field_to_show->getHtmlId(), $field_to_show->getName())
->addFieldDependence
 (
 $field_to_show->getName(),
 $field_to_evaluate->getName(),
 'dependecy 1'
 )
->addFieldDependence
 (
 $field_to_show->getName(),
 $field_to_evaluate->getName(),
 'dependecy 2'
 )

With this code it looks like only add the first dependency

Can i also indicate if the $field_to_show hides insteand of show?

Edit

This seem to be an issue in Magento2, one possible workaround is

In your construct inject FieldFactory and also create a protected var for _fieldFactory

public function __construct(
 ......
 MagentoConfigModelConfigStructureElementDependencyFieldFactory $fieldFactory,
 ......
) 
 ....
 $this->_fieldFactory = $fieldFactory;
 ....

Then update your existing code to

$refField = $this->_fieldFactory->create(
 ['fieldData' => ['value' => 'dependecy 1,dependecy 2', 'separator' => ','], 'fieldPrefix' => '']
);


->addFieldDependence
 (
 $field_to_show->getName(),
 $field_to_evaluate->getName(),
 $refField
 )

I created an issue for this at https://github.com/magento/magento2/issues/4796

Try

->addFieldMap($field_to_evaluate->getHtmlId(), $field_to_evaluate->getName())
->addFieldMap($field_to_show->getHtmlId(), $field_to_show->getName())
->addFieldDependence
 (
 $field_to_show->getName(),
 $field_to_evaluate->getName(),
 array('dependecy 1','dependecy 2')
 )

To hide the field by default, you should set the default selected value of that option to the option that would trigger it to hide (to prevent any UI confusion)

$refField = $this->_fieldFactory->create(['fieldData' => ['value' => '1,2', 'separator' => ','], 'fieldPrefix' => '']
);

 $this->setChild('form_after', $this->getLayout()->createBlock(
 'MagentoBackendBlockWidgetFormElementDependence')
 ->addFieldMap($action->getHtmlId(), $action->getName())
 ->addFieldMap($anotherFieldweb->getHtmlId(), $anotherFieldweb->getName())
 ->addFieldMap($anotherFieldstore->getHtmlId(), $anotherFieldstore->getName())
 ->addFieldMap($anotherFieldhideorders->getHtmlId(), $anotherFieldhideorders->getName())
 ->addFieldMap($anotherFieldhideinvoice->getHtmlId(), $anotherFieldhideinvoice->getName())
 ->addFieldMap($anotherFieldhideshipment->getHtmlId(), $anotherFieldhideshipment->getName())
 ->addFieldMap($anotherFieldhidecredit->getHtmlId(), $anotherFieldhidecredit->getName())

 ->addFieldDependence($anotherFieldweb->getName(),$action->getName(),1)
 ->addFieldDependence($anotherFieldstore->getName(),$action->getName(),2)
 ->addFieldDependence($anotherFieldhideorders->getName(),$action->getName(),$refField)
 ->addFieldDependence($anotherFieldhideinvoice->getName(),$action->getName(),$refField)
 ->addFieldDependence($anotherFieldhideshipment->getName(),$action->getName(),$refField)
 ->addFieldDependence($anotherFieldhidecredit->getName(),$action->getName(),$refField)
 );