Class Metadata

api/metadata/models.py:117–140

This model represents the actual metadata attached to a specific instance of a model e.g: Environment.objects.get(id=1).metadata

class Metadata(AbstractBaseExportableModel):
    """This model represents the actual metadata attached to a specific instance of a model
    e.g: Environment.objects.get(id=1).metadata

    """

    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
    object_id = GenericObjectID()
    content_object = GenericForeignKey("content_type", "object_id")
    model_field = models.ForeignKey(MetadataModelField, on_delete=models.CASCADE)
    field_value = models.TextField(max_length=FIELD_VALUE_MAX_LENGTH)

    class Meta:
        unique_together = ("model_field", "content_type", "object_id")

    def deep_clone_for_new_entity(self, cloned_entity: models.Model) -> "Metadata":
        content_type = ContentType.objects.get_for_model(cloned_entity)
        metadata: Metadata = Metadata.objects.create(
            model_field=self.model_field,
            content_type=content_type,
            object_id=cloned_entity.pk,
            field_value=self.field_value,
        )
        return metadata