我如何循环通过对象的字段？

Question

I have a model like this, how can I loop through it and not have to type out company.id, company.name, etc?

class Company(models.Model):
    name = models.CharField(max_length=1000)
    website = models.CharField(max_length=1000)
    email = models.CharField(max_length=200)
    phone_number = models.CharField(max_length=100)
    city = models.CharField(max_length=1000)
    zip = models.IntegerField()
    state = models.CharField(max_length=1000)
    address = models.CharField(max_length=1000)
    address2 = models.CharField(max_length=1000)

Answer 1

You can loop over all field names like so

for name in Company._meta.get_all_field_names():
    print name

this also works if you have a category instance:

c = Company(name="foo",website="bar",email="baz@qux.com",....,)
c.save()
for field in c._meta.get_all_field_names():
    print getattr(c, field, None)

Update for Django 1.8

Django 1.8 now has an official model Meta api and you can easily grab all the fields:

from django.contrib.auth.models import User
for field in User._meta.get_fields():
    print field

Answer 2

Iteration in a view :

If you have an instance company of Company :

fields= company.__dict__
for field, value in fields.items():
    print field, value

Answer 3

首先得到它们 ，然后使用for循环或列表理解。

Answer 4

this is a possible solution:

entity = Company.all().get()

for propname, prop in entity.properties().items():   
    print propname, prop.get_value_for_datastore(entity)

another one could be:

# this returns a dict with the property 
# name as key and the property val as its value
entity.__dict__.get('_entity')