Question

我有一个自定义命令用JSON数据填充Django对象，这些数据主要以我想要的方式工作，但是我遇到了django-taggit字段的问题。解析完所有数据并以JSON格式输出后，类型在我的JSON对象中显示如下：

"genres": "latin pop, pop, singer-songwriter",

django-taggit采用以逗号分隔的标记列表，这就是它。但是当我运行下面的自定义命令时，我的模型的genres = TaggableManager()字段中没有任何内容。

import json
import dateparser
from django.db import IntegrityError
from django.core.management.base import BaseCommand, CommandError
from concerts.models import Concert, Venue


class Command(BaseCommand):
    help = "Load JSON concert data"

    def add_arguments(self, parser):
        parser.add_argument('concert_file', type=str)

    def handle(self, *args, **options):
        with open(options['concert_file']) as f:
            data = json.load(f)
        for concert in data:
            try:
                venue = Venue.objects.get(name=concert['venue'])
            except Venue.DoesNotExist:
                print "Can't find venue! " + concert['venue']
                pass
            del concert['venue']
            try:
                Concert.objects.create(venue=venue, **concert)
            except IntegrityError:
                print concert['slug'] + ": This concert already exists!"
                pass
                # if the slug unique contrainst fails, just pass this concert

如何让genres字段以我想要的方式填充？

Answer 1

这是我想到的，以防其他任何人遇到这个问题：

class Command(BaseCommand):
help = "Load JSON concert data"

def add_arguments(self, parser):
    parser.add_argument('concert_file', type=str)

def handle(self, *args, **options):
    with open(options['concert_file']) as f:
        data = json.load(f)
    for concert in data:
        try:
            venue = Venue.objects.get(name=concert['venue'])
        except Venue.DoesNotExist:
            print "Can't find venue! " + concert['venue']
            pass
        del concert['venue']
        try:
            Concert.objects.create(venue=venue, **concert)
            print concert['slug'] + ": Concert created!"
        except IntegrityError: # if slug already exists
            print concert['slug'] + ": This slug already exists!"
            pass
            # if the slug unique contrainst fails, just pass this concert
        try:
            new_concert = Concert.objects.get(slug=concert['slug'])
            genres = concert['genres'].split(", ")
            for genre in genres:
                new_concert.genres.add(genre)
        except KeyError or AttributeError: # if no genres key exists
            pass

正如您所料，答案在于文档。我查看了django-taggit文档，特别是关于API的文档，然后在上面的上一个try / except语句中添加了标准标记。

此代码的奖励（对我来说）即使音乐会已经存在，此代码也会更新流派字段。

用** kwargs /一个字符串填充django-taggit字段

1 个答案: