So I can set it to a default value, such as 'N/A' - something similar to
the MSSQL function ISNULL that I can use in the class definition.
On Monday, June 6, 2016 at 10:41:08 AM UTC-5, Horcle wrote:
>
> I'm basically looking for something I can add to the backref or ForeignKey
> definition for the case that the value of provider_id is None.
>
> On Monday, June 6, 2016 at 10:21:39 AM UTC-5, Horcle wrote:
>>
>> I have the following models:
>>
>> class LabResult(Model):
>> __tablename__ = 'cp_svc_lab_result'
>> id = Column(Integer, primary_key=True, autoincrement=True)
>> test_code = Column(String(255))
>> test_code_system = Column(String(255))
>> test_name = Column(String(255))
>> test_name_orig = Column(String(255))
>> proc_name = Column(String(255))
>> proc_code = Column(String(255))
>> proc_code_modifier = Column(String(255))
>> proc_code_system = Column(String(255))
>> result_value = Column(String(255))
>> result_value_num = Column(String(255))
>> result_value_num_orig = Column(String(255))
>> result_unit = Column(String(255))
>> result_unit_orig = Column(String(255))
>> ref_normal_min = Column(String(255))
>> ref_normal_max = Column(String(255))
>> result_characterization = Column(String(255))
>> collection_datetime = Column(DateTime)
>> result_datetime = Column(DateTime)
>> abnormal_flag = Column(String(255))
>> lab_status = Column(String(255))
>> result_comment = Column(UnicodeText)
>> component_comment = Column(UnicodeText)
>> order_id = Column(String(255))
>> order_num = Column(String(255))
>> order_priority = Column(String(255))
>> order_result_id = Column(String(255))
>> order_reviewed = Column(String(255))
>> order_type_orig = Column(String(255))
>> order_type_orig_id = Column(String(255))
>> result_code_orig = Column(String(255))
>> result_code_orig_system = Column(String(255))
>> result_status = Column(String(255))
>> patient_id = Column(Integer, ForeignKey('cp_patient.patient_id'))
>> service_id = Column(Integer, ForeignKey('cp_service.service_id'))
>> provider_id = Column(Integer, ForeignKey('cp_provider.provider_id'))
>>
>> and,
>>
>> class Provider(Model):
>> __tablename__ = 'cp_provider'
>> provider_id = Column(Integer, primary_key=True)
>> authorize_meds_yn = Column(String(80))
>> active_status = Column(String(80))
>> authorize_orders_yn = Column(String(80))
>> birth_date = Column(DateTime)
>> clinician_degree = Column(String(80))
>> clinician_title = Column(String(80))
>> country = Column(String(80))
>> dea_number = Column(String(80))
>> email = Column(String(80))
>> external_name = Column(String(80))
>> provider_e_prescribe_yn = Column(String(80))
>> inpatient_ordering_yn = Column(String(80))
>> name = Column(String(80))
>> npi = Column(String(80))
>> office_fax = Column(String(80))
>> office_phone = Column(String(80))
>> outpatient_ordering_yn = Column(String(80))
>> provider_type = Column(String(80))
>> referral_source_type = Column(String(80))
>> resident_yn = Column(String(80))
>> sex = Column(String(80))
>> surgical_pool_yn = Column(String(80))
>> transcription_user_yn = Column(String(80))
>> upin = Column(String(80))
>> encounter = relationship("EncounterList", backref=backref("Provider"),
>> lazy='dynamic')
>>
>> Where one provider can have multiple LabResults... How do I handle the
>> case when there may be a provider_id in the LabResult table, but not in the
>> Provider table (we are only keeping a subset of the provider list)? I need
>> to access the object Provider so that I can have access to all of its
>> attributes, such as Provider.name, etc. When I try this now, I get an error
>> that "Nonetype has attribute name." Ia there a way to set a default value
>> for when the result is NULL?
>>
>> Thanks!
>>
>>
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