edc-visit-tracking

Track study participant visit reports.

Declaring a visit model

For a subject that requires ICF would look like this:

class SubjectVisit(VisitModelMixin, OffstudyMixin, CreatesMetadataModelMixin, RequiresConsentModelMixin, BaseUuidModel):

    class Meta(VisitModelMixin.Meta):
        consent_model = 'edc_example.subjectconsent'
        app_label = 'edc_example'

If the subject does not require ICF, such as an infant, just don't include the RequiresConsentModelMixin:

class InfantVisit(VisitModelMixin, OffstudyMixin, CreatesMetadataModelMixin, BaseUuidModel):

    class Meta(VisitModelMixin.Meta):
        app_label = 'edc_example'

In both cases a OneToOneField attr to edc_example.Appointment is added through the VisitModelMixin mixin, so edc_example.Appointment must exist.

Declaring a CRF

The CrfModelMixin is required for all CRF models. CRF models have a key to the visit model.

class CrfOne(CrfModelMixin, OffstudyMixin, RequiresConsentModelMixin, UpdatesCrfMetadataModelMixin, BaseUuidModel):

    subject_visit = models.OneToOneField(SubjectVisit)

    f1 = models.CharField(max_length=10, default='erik')

    vl = models.CharField(max_length=10, default=NO)

    rdb = models.CharField(max_length=10, default=NO)

    class Meta:
        consent_model = 'edc_example.subjectconsent'
        app_label = 'edc_example'
        offstudy_model = 'edc_example.subjectoffstudy'

Declaring forms:

The VisitFormMixin includes a number of common validations in the clean method:

class SubjectVisitForm(VisitFormMixin, forms.ModelForm):

    class Meta:
        model = SubjectVisit

PreviousVisitModelMixin

The PreviousVisitModelMixin ensures that visits are entered in sequence. It is included with the VisitModelMixin.