How to use the formulas.models.Formula.COMPLETE function in formulas

for component in changed_components:
            validate_component(formula, repodir, component)

        # Check to see if the removed components are used
        removal_errors = []
        for component in removed_components:
            blueprint_hosts = component.blueprinthostformulacomponent_set.all()
            if len(blueprint_hosts) is 0:
                component.delete()
            else:
                removal_errors.append(component.sls_path)

        if len(removal_errors) is not 0:
            errors = ', '.join(removal_errors)
            formula.set_status(
                Formula.COMPLETE,
                'Formula could not be updated.  The following components '
                'are used in blueprints: {0}.   '
                'Your formula was left unchanged.'.format(errors))
            return False

        # Add the new components
        for component in added_components:
            title = component['title']
            description = component.get('description', '')
            sls_path = component['sls_path']
            formula.components.create(title=title,
                                      sls_path=sls_path,
                                      description=description)

        # Update the other components
        for component in changed_components: