Patient registration module.
The model RegisteredSubject is used by the Edc as the master subject registration table. Only one record may exist per individual. The table has space for PII so typically a RegisteredSubject instance is created or updated on completion of the informed consent. As always, PII in the Edc is encrypted at rest using django-crypto-field.
For the model and signal to be registered you need to add the AppConfig to your INSTALLED_APPS:
INSTALLED_APPS = ( .... 'edc_registration.apps.AppConfig', .... )
RegisteredSubject is never edited directly by the user. Instead some other model with the needed attributes is used as a proxy. To have a model perform the task of creating or updating RegisteredSubject, declare it with the UpdatesOrCreatesRegistrationModelMixin.
For example, a model, SubjectEligibility or a screening model creates or updates RegisteredSubject without a subject identifier then a model such as the SubjectConsent in tests.models, also creates or updates a subject’s RegisteredSubject instance on save. For this to happen, both models are declared with the UpdatesOrCreatesRegistrationModelMixin:
class SubjectEligibility(UniqueSubjectIdentifierModelMixin, UpdatesOrCreatesRegistrationModelMixin, BaseUuidModel): screening_identifier = models.CharField( max_length=36, null=True, unique=True) @property def registration_unique_field(self): return 'screening_identifier' def update_subject_identifier_on_save(self): """Overridden to not set the subject identifier on save. """ if not self.subject_identifier: self.subject_identifier = self.subject_identifier_as_pk.hex self.subject_identifier_aka = self.subject_identifier_as_pk.hex return self.subject_identifier class SubjectConsent( ConsentModelMixin, UpdatesOrCreatesRegistrationModelMixin, CreateAppointmentsMixin, IdentityFieldsMixin, ReviewFieldsMixin, PersonalFieldsMixin, CitizenFieldsMixin, VulnerabilityFieldsMixin, BaseUuidModel): @property def registration_unique_field(self): return 'screening_identifier' class Meta: app_label = 'my_app'
The property registration_unique_field returns a model attribute that is used to set a registration identifier on RegisteredSubject.
A subject’s RegisteredSubject instance is created and updated in a post_save signal. As mentioned, it is never edited directly by the user.
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