# PCM Metadata Bundle Easily add scalar metadata to a Symfony entity via the use of a key-value interface. # Usage 1. Use the `MetadataTrait` inside an entity: ```php class MyEntity { use MetadataTrait; } ``` 2. Create and execute a new migration. The trait adds a `metadata` database field and as such we need to create a migration. 3. Access the metadata object with the readonly property `metadata`: ```php $entity->metadata->set("name", "PCM"); $entity->metadata->get("name"); // "PCM" $entity->metadata->isSet("name"); // true ``` > Like updating the value of a property normally, setting metadata values will not automatically update the database. You must call `flush()` from the `EntityManager` as usual when you wish to persist data.