Question

在我的自定义命令文件中，我想向模型添加对象。这是我其中一个应用中的models.py ...

from wagtail.core.models import Page
from modelcluster.fields import ParentalKey, ParentalManyToManyField

class PersonPage(Page):
    name = models.CharField("Name", max_length=255)
    entity = models.ForeignKey("bids.EntityPage", null=True, on_delete=models.PROTECT)

class EntityPage(Page):
    name = models.CharField("Name", max_length=255)

class BidPage(Page):
    pre_bid_attendees = ParentalManyToManyField("bids.PersonPage", blank=True)

在我的custom_command.py中，我有这个：

from django.core.management.base import BaseCommand, CommandError
from wagtail.core.utils import cautious_slugify
from bids.models import *
import os.path, csv

class Command(BaseCommand):
    help = "Automate the insertion of pre-bid attendees using CSV file."

    def add_arguments(self,parser):
        parser.add_argument("--file")

    def handle(self, *args, **options):
        reader = csv.DictReader(open(options["file"]))
        for row in reader:
            if not EntityPage.objects.filter(name=row["Entity"]).exists():
                parentEntityPage = EntityIndexPage.objects.first()
                newEntity = EntityPage(
                    title=row["Entity"],
                    name=row["Entity"],
                    slug=cautious_slugify(row["Entity"]),
                    live=False,
                )
                parentEntityPage.add_child(instance=newEntity)
                newEntity.save_revision(submitted_for_moderation=True)
                self.stdout.write(self.style.SUCCESS("Added entity: '%s'" % row["Entity"]))

            entityID = EntityPage.objects.get(name=row["Entity"]).page_ptr_id
            if not PersonPage.objects.filter(entity_id=entityID, name=row["Name"]).exists():
                parentPersonPage = PersonIndexPage.objects.first()
                newPerson = PersonPage(
                    title=row["Name"],
                    entity_id=entityID,
                    live=False,
                )
                parentPersonPage.add_child(instance=newPerson)
                newPerson.save_revision(submitted_for_moderation=True)
                self.stdout.write(self.style.SUCCESS("Added person '%s' of entity '%s'" % (row["Name"],row["Entity"])))

我想构建一个自定义命令，该命令将从CSV读取数据并将数据插入数据库的bids_bidpage_pre_bid_attendees表中。如何在BidPage字段中与人一起向班级添加pre_bid_attendees对象？

将对象添加到带有ParentalManyToManyField的类中？

0 个答案: