Got AttributeError quando si cerca di ottenere un valore per il campo 'status_code'

Question

sto ricevendo l'errore

AttributeError: Got AttributeError when attempting to get a value for field `status_code` on serializer `MedTestGetTestResultSerializer`. 
The serializer field might be named incorrectly and not match any attribute or key on the `unicode` instance. 
Original exception text was: 'unicode' object has no attribute 'status_code'. 

quando sto cercando di scrivere un serializzatore Django.

mio serializzatore si presenta così:

class MedTestGetTestSerializer(serializers.ModelSerializer): 
    test_id = serializers.CharField(source='medteststypetest_id.test_id') 
    test_name = serializers.CharField(source='medteststypetest_id.test_name') 
    username = serializers.CharField(source='user_id.username') 
    user_id = serializers.CharField(source='user_id.user_id') 
    kit_id = serializers.CharField(source='kit_id.kit_id') 
    test_results = MedTestGetTestResultSerializer(source='medtests_id', many=True, required=False) 

class Meta: 
    model = MedTests 
    fields = ("medtests_id", 
       "datekitord", 
       "testdate", 
       "user_id", 
       "kit_id", 
       "status", 
       "username", 
       "test_name", 
       "test_id", 
       "test_results") 

mio serializzatore nidificato simile a questa:

class MedTestGetTestResultSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = MedTestsResults 
     fields = ("result_date", 
        "value", 
        "test_started", 
        "status_code") 

Perché dovrei ricevere questo errore? Quando provo ad usare il secondo serializzatore nella shell, ottengo l'errore status_code quando non imposto molti = True, ma sto impostando many = True nel primo serializzatore.

MedTestsResults modello:

class MedTestsResults(models.Model): 
    medtests_results_id = models.CharField(max_length=100) 
    medtests_id = models.ForeignKey(MedTests) 
    result_date = models.DateTimeField(null=True, blank=True) 
    test_started = models.DateTimeField(null=True, blank=True) 
    status_code = models.CharField(max_length=25) 
    value = models.IntegerField(null=True, blank=True) 
    hiv4g_rsltdate = models.DateTimeField(null=True, blank=True) 
    hivms_rsltdate = models.DateTimeField(null=True, blank=True) 
    hiv4gpos = models.CharField(max_length=100, null=True, blank=True) 
    hiv4gneg = models.CharField(max_length=100, null=True, blank=True) 
    hiv4gind = models.CharField(max_length=100, null=True, blank=True) 
    hiv4grej = models.CharField(max_length=100, null=True, blank=True) 
    hivmpos = models.CharField(max_length=100, null=True, blank=True) 
    hivmsneg = models.CharField(max_length=100, null=True, blank=True) 
    hivmsind = models.CharField(max_length=100, null=True, blank=True) 
    hivmsrej = models.CharField(max_length=100, null=True, blank=True) 

MedTests:

class MedTests(models.Model): 
    medtests_id = models.CharField(max_length=100) 
    medteststypetest_id = models.ForeignKey(MedTestsType) 
    datekitord = models.DateTimeField() 
    testdate = models.DateTimeField() 
    status = models.CharField(max_length=100) 
    hiv4g_testdate = models.DateTimeField(blank=True, null=True) 
    hivms_testdate = models.DateTimeField(blank=True, null=True) 
    kit_id = models.ForeignKey(Kits) 
    user_id = models.ForeignKey(User) 

Answer 1

risposta: l'uso related_name attr

models.py

class MedTest(models.Model): 
    date_kit_ord = models.DateTimeField() 
    test_date = models.DateTimeField() 
    status = models.CharField(max_length=100) 
    hiv4g_test_date = models.DateTimeField(blank=True, null=True) 
    hivms_test_date = models.DateTimeField(blank=True, null=True) 
    user = models.ForeignKey(User) 

class MedTestResult(models.Model): 
    med_test_result = models.CharField(max_length=100) 
    med_test = models.ForeignKey(MedTest, related_name='med_tests') 
    result_date = models.DateTimeField(null=True, blank=True) 
    test_started = models.DateTimeField(null=True, blank=True) 
    status_code = models.CharField(max_length=25) 
    value = models.IntegerField(null=True, blank=True) 
    hiv4g_rsltdate = models.DateTimeField(null=True, blank=True) 
    hivms_rsltdate = models.DateTimeField(null=True, blank=True) 
    hiv4gpos = models.CharField(max_length=100, null=True, blank=True) 
    hiv4gneg = models.CharField(max_length=100, null=True, blank=True) 
    hiv4gind = models.CharField(max_length=100, null=True, blank=True) 
    hiv4grej = models.CharField(max_length=100, null=True, blank=True) 
    hivmpos = models.CharField(max_length=100, null=True, blank=True) 
    hivmsneg = models.CharField(max_length=100, null=True, blank=True) 
    hivmsind = models.CharField(max_length=100, null=True, blank=True) 
    hivmsrej = models.CharField(max_length=100, null=True, blank=True) 

tracing.py

import os 
import django 

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'youproject.settings') 

django.setup() 

from rest_framework import serializers 

from frontend import models as fm 

class MedTestResultSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = fm.MedTestResult 
     fields = ('result_date', 
        'value', 
        'test_started', 
        'status_code') 

class MedTestSerializer(serializers.ModelSerializer): 
    username = serializers.CharField(source='user.username') 
    user_id = serializers.CharField(source='user.id') 
    med_tests = MedTestResultSerializer(many=True) 

    class Meta: 
     model = fm.MedTest 
     fields = (
      'med_tests', 
      'user_id', 
      'username', 
     ) 


print MedTestSerializer(fm.MedTest.objects.all()[0]).data 

e molto difficile da leggere il vostro codice (lo stile, le convenzioni di denominazione, ecc) cercano two scoops

Answer 2

Penso django-resto-quadro utilizza status_code da qualche parte, si potrebbe desiderare di provare a rinominare il vostro campo status_code a qualcosa altro.