nullable_mapping.md

Symfony-RDM – Nullable-Mapping

What it does

The nullable mapping allows to have any other mapping nullable (map to null) depending on a column in the database.

Attributes:

• field (required): The field of the entity
• column (optional): name of the column to use - can be an extra-column to store if the value is null or not (useful if the contained mapping consists of many columns)
• strict (optional): only evaluate as null if the column-value is null (useful if the column is the same as the column containing the value of the contained mapping) Do not use together with column, as column to set the column-value to '0' if the value is null!

XML Mapping

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping
    xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
    xmlns:rdm="https://github.com/addiks/symfony_rdm/raw/master/Resources/mapping-schema.v1.xsd"
>
	<entity name="Foo\Bar\SomeEntity" table="some_entity">
		…
		<rdm:nullable field="bar">
		    <rdm:object class="Foo\Bar" />
		</rdm:nullable>
		…
	</entity>
</doctrine-mapping>