Django 反序列化错误 安装夹具时出现问题

Question

Traceback (most recent call last):
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/serializers/json.py", line 69, in Deserializer
    yield from PythonDeserializer(objects, **options)
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/serializers/python.py", line 91, in Deserializer
    Model = _get_model(d["model"])
KeyError: 'model'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/management/base.py", line 316, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/management/base.py", line 353, in execute
    output = self.handle(*args, **options)
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/management/commands/loaddata.py", line 72, in handle
    self.loaddata(fixture_labels)
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/management/commands/loaddata.py", line 113, in loaddata
    self.load_label(fixture_label)
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/management/commands/loaddata.py", line 168, in load_label
    for obj in objects:
  File "/Users/sparshkedia/Desktop/task/venv/lib/python3.6/site-packages/django/core/serializers/json.py", line 73, in Deserializer
    raise DeserializationError() from exc
django.core.serializers.base.DeserializationError: Problem installing fixture '/Users/sparshkedia/Desktop/task/movie_rs/movies.json'

这是当我尝试将我的 json 文件反序列化到数据库中时显示的上述错误。

我的 json 文件如下所示：

[
  {
    "description": "A cowboy doll is profoundly threatened and jealous when a new spaceman figure supplants him as top toy in a boy's room.",
    "genre": "Animation,Adventure,Comedy,Family,Fantasy",
    "imdb_url": "https://www.imdb.com/title/tt0114709/",
    "img_url": "https://m.media-amazon.com/images/M/MV5BMDU2ZWJlMjktMTRhMy00ZTA5LWEzNDgtYmNmZTEwZTViZWJkXkEyXkFqcGdeQXVyNDQ2OTk4MzI@._V1_UX182_CR0,0,182,268_AL__QL50.jpg",
    "movie_id": 114709,
    "title": "Toy Story",
    "users_rating": 8.3,
    "year": 1995
  },
  {
    "description": "George Banks must deal not only with the pregnancy of his daughter, but also with the unexpected pregnancy of his wife.",
    "genre": "Comedy,Family,Romance",
    "imdb_url": "https://www.imdb.com/title/tt0113041/",
    "img_url": "https://m.media-amazon.com/images/M/MV5BOTEyNzg5NjYtNDU4OS00MWYxLWJhMTItYWU4NTkyNDBmM2Y0XkEyXkFqcGdeQXVyMTQxNzMzNDI@._V1_UX182_CR0,0,182,268_AL__QL50.jpg",
    "movie_id": 113041,
    "title": "Father of the Bride Part II",
    "users_rating": 6,
    "year": 1995
  }]

我需要做什么才能将 json 文件输入数据库？ 我还创建了适当的电影 model，其中包含 json 文件中的所有字段。

我为此使用 python manage.py loaddata movies.json。 有没有其他方法，如果有，请帮助我吗？

Answer 1

Fixtures 文件必须匹配 django 序列化格式，例如：

[
    {
        "pk": "4b678b301dfd8a4e0dad910de3ae245b",
        "model": "sessions.session",
        "fields": {
            "expire_date": "2013-01-16T08:16:59.844Z",
            ...
        }
    }
]

所以你需要用以下方式重写你的灯具：

1. 添加model键
2. 添加pk字段
3. 将其余字段移动到fields内部对象

Answer 2

有时对象没有正确关闭

• 打开 JSON 文件，查看 pycharmIDE 突出显示的错误。
• 如果任何对象未关闭，请手动修复。

Answer 3

我在 manage.py 中有打印语句。 该输出被保存在产生格式错误的夹具 json 文件中。 删除那些打印语句解决了它。 以下是我的旧（格式错误）装置 .json 文件。 我删除了第一行，它起作用了。

app.yaml file = dev_app.yaml
[
  {
    "model": "plans.planslevel1",
    "pk": 1,
    "fields": {
      "name": "abc",
      "description": "xyz"
    }
  
  }]

Answer 4

在 django 4.1 中，您可以使用（文档）：

python3 manage.py loaddata ./fixtures/YOUR_DATA.json