问题
I have an "Export to CSV" button that exports all car models. When I export all cars into CSV, the "features" (e.g. AM/FM Radio, Moon Roof, Leather Interior, Bluetooth, GPS etc..) column displays as the following:
[<Feature: GPS>, <Feature: Leather>]
How do I get rid of all that other stuff, and just have "GPS, Leather"?
MODEL
class Features(models.Model):
name = models.CharField(max_length=20)
def __unicode__(self):
return self.name
class Car(models.Model):
model_name = models.CharField(max_length=20)
features = models.ManyToManyField(features)
def __unicode__(self):
return self.model_name
VIEW.PY
def query(request):
results = Car.objects.all()
response = HttpResponse(mimetype='text/csv')
response['Content-Disposition'] = 'attachment;filename="car_export.csv"'
writer = csv.writer(response)
writer.writerow(['Model Name', 'Features'])
for x in results:
writer.writerow([x.model_name, x.role.all()])
return response
ANSWER:
MODELS:
class Features(models.Model):
name = models.CharField(max_length=20)
def __unicode__(self):
return self.name
class Car(models.Model):
model_name = models.CharField(max_length=20)
features = models.ManyToManyField(features)
def __unicode__(self):
return self.model_name
VIEWS:
def query(request):
results = Car.objects.all()
response = HttpResponse(mimetype='text/csv')
response['Content-Disposition'] = 'attachment;filename="car_export.csv"'
writer = csv.writer(response)
writer.writerow(['Model Name', 'Features'])
for x in results:
writer.writerow([x.model_name, ', '.join([x.name for x in x.role.all()]),])
return response
回答1:
Depends on what field you want to print in the features model... You are looking at an m2m manager - it's a helper that returns a queryset interface. If you want all related features, you'd want to call x.features.all()
Replace with your actual field on the features model.
csv_features = ','.join([x.MY_FIELD_HERE for x in x.features.all()])
来源：https://stackoverflow.com/questions/10455753/django-how-to-output-csv-with-model-containing-many-to-many-field