Cant unset Location

[ivoba]

It seems unsetting a Location or having null values is not possible since the default values are always written to DataObject.

So this is a mandatory field and its not possible to have this optional.
How can we make this field optional resp. having null values in Location?

[willmorgan]

It's been a long time since I've worked on this project, but maybe this snippet has a hint on how to resolve?

silverstripe-googlemapfield/src/GoogleMapField.php

Lines 230 to 238 in 06fdaa0

	protected function recordFieldData($name) {
	$fieldName = $this->childFieldName($name);
	return $this->data->$fieldName ?: $this->getDefaultValue($name);
	}
	public function getDefaultValue($name) {
	$fieldValues = $this->getOption('default_field_values');
	return isset($fieldValues[$name]) ? $fieldValues[$name] : null;
	}

Maybe set default_field_values to their respective null values?

[ivoba]

@willmorgan Unfortunatly null translates to lat: 0, lon: 0 which is a valid geo value.

Would be great if one could delete the marker on the map and then value is set to null.
Probably some javascript adjustments. Maybe i find something...

[dhensby]

Yeah, probably need a clear value button to unset the marker

[ivoba]

Or just not set the marker by default, just center the map with the given default values.
To have a Location one needs to create a marker with a doubleclick.

[dhensby]

How do you show the current location if you don't have a marker on load?

[ivoba]

If Location is not null resp. Location is already set then there should be a marker on load.
Just if Location is null there shouldnt be a marker.