自定义 django 管理命令，用于使用 pycountry 属性错误填充国家/地区

Question

我正在尝试创建一个自定义命令以从pycountry包填充admin中的国家/地区。但是我感到困惑 属性错误 说我没有正确引用它。有人可以帮助我识别我的错误吗？

管理命令的项目设置为：

market/ 
    manage.py
    address/
        __init__.py
        models.py
        management/
            __init__.py
            commands/
                __init__.py
                market_populate_countries.py
        views.py

管理命令代码：

from __future__ import absolute_import
import sys
from optparse import make_option
from default.core.loading import get_model
from django.core.management.base import BaseCommand, CommandError
class Command(BaseCommand):
    help = "Populates the list of countries with data from pycountry."
    option_list = BaseCommand.option_list + (
        make_option(
            '--no-shipping',
            action='store_false',
            dest='is_shipping',
            default=True,
            help="Don't mark countries for shipping"),
        make_option(
            '--initial-only',
            action='store_true',
            dest='is_initial_only',
            default=False,
            help="Exit quietly without doing anything if countries were already populated."),
    )
    def handle(self, *args, **options):
        try:
            import pycountry
        except ImportError:
            raise CommandError(
                "You are missing the pycountry library. Install it with "
                "'pip install pycountry'")
        if Country.objects.exists():
            if options.get('is_initial_only', False):
                # exit quietly, as the initial load already seems to have happened.
                self.stdout.write("Countries already populated; nothing to be done.")
                sys.exit(0)
            else:
                raise CommandError(
                    "You already have countries in your database. This command "
                    "currently does not support updating existing countries.")
        countries = [
            Country(
                iso_3166_1_a2=country.alpha2,
                iso_3166_1_a3=country.alpha3,
                iso_3166_1_numeric=country.numeric,
                printable_name=country.name,
                name=getattr(country, 'official_name', ''),
                is_shipping_country=options['is_shipping'])
            for country in pycountry.countries]
        Country.objects.bulk_create(countries)
        self.stdout.write("Successfully added %s countries." % len(countries))

追踪：

C:UsersAlikhanamazonclonemarket>manage.py market_populate_countries
Traceback (most recent call last):
  File "C:UsersAlikhanamazonclonemarketmanage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "C:Python27libsite-packagesdjangocoremanagement__init__.py", line
354, in execute_from_command_line
    utility.execute()
  File "C:Python27libsite-packagesdjangocoremanagement__init__.py", line
346, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:Python27libsite-packagesdjangocoremanagementbase.py", line 394,
 in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:Python27libsite-packagesdjangocoremanagementbase.py", line 445,
 in execute
    output = self.handle(*args, **options)
  File "C:UsersAlikhanamazonclonemarketaddressmanagementcommandsmarket_
populate_countries.py", line 56, in handle
    for country in pycountry.countries]
  File "C:Python27libsite-packagespycountrydb.py", line 22, in __getattr__
    raise AttributeError
AttributeError

这无关紧要，但以下是我为get_model自定义源函数以避免任何混淆的方式。

from __future__ import absolute_import
import sys
import traceback
from importlib import import_module
from django.apps import apps
from django.apps.config import MODELS_MODULE_NAME
from django.conf import settings
from django.core.exceptions import AppRegistryNotReady
from .exceptions import (
    AppNotFoundError, ClassNotFoundError, ModuleNotFoundError)
def get_model(app_label, model_name):
    try:
        return apps.get_model(app_label, model_name)
    except AppRegistryNotReady:
        if apps.apps_ready and not apps.models_ready:
            app_config = apps.get_app_config(app_label)
            import_module('%s.%s' % (app_config.name, MODELS_MODULE_NAME))
            return apps.get_registered_model(app_label, model_name)
        else:
            raise

Answer 1

pycountry似乎将数字分隔为 alpha_2 和 3

country.alpha2和country.alpha3应分别country.alpha_2和country.alpha_3

---

更改上述内容后，您的代码应变为

    countries = [
        Country(
            iso_3166_1_a2=country.alpha_2,
            iso_3166_1_a3=country.alpha_3,
            iso_3166_1_numeric=country.numeric,
            printable_name=country.name,
            name=getattr(country, 'official_name', ''),
            is_shipping_country=options['is_shipping'])
        for country in pycountry.countries]