带有序列化程序的 Django REST 框架 CurrentUserDefault()

Question

我一直在尝试为我的模型添加一个“所有者”字段。我已经看过其他问题，但我仍然没有运气。理想情况下，当创建新笔记时，当前用户将设置在所有者字段中并且不可更改。

下面是我的模型、序列化程序和就我所知的 Note 视图。我猜 CurrentUserDefault() 函数需要额外的上下文，但我无法正确设置它。

视图.py

class NoteListCreateView(ListCreateAPIView):
    authentication_classes = (SessionAuthentication, TokenAuthentication)
    permission_classes = (DjangoModelPermissions,)
    lookup_field = 'pk'
    serializer_class = serializers.NoteSummarySerializer

    def get_queryset(self):
        qs = Note.objects.all()
        # general search
        query = self.request.GET.get('search')
        if query is not None:
            qs = qs.filter(
                Q(title__icontains=query) |
                Q(content__icontains=query)
            ).distinct()
        # title search
        query = self.request.GET.get('title')
        if query is not None:
            qs = qs.filter(title__icontains=query)
        # content search
        query = self.request.GET.get('content')
        if query is not None:
            qs = qs.filter(content__icontains=query)
        return qs

序列化程序.py

class NoteSummarySerializer(serializers.ModelSerializer):
    owner = serializers.PrimaryKeyRelatedField(default=serializers.CurrentUserDefault(), read_only=True)

    class Meta:
        model = Note
        fields = (
            'pk',
            'title',
            'containerId',
            'created',
            'updated',
            'owner',
        )

模型.py

class Base(models.Model):
    title = models.CharField(max_length=30)
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    owner = models.ForeignKey(get_user_model(), on_delete=models.CASCADE)

    class Meta:
        abstract = True
        ordering = ['title', '-updated']


class Note(Base):
    containerId = models.ForeignKey(Folder, related_name='notes', on_delete=models.CASCADE, null=True)
    content = models.TextField()

    class Meta:
        db_table = 'marknote_notes'

当我尝试发布新笔记时，出现以下错误：

IntegrityError at /marknote/note
NOT NULL constraint failed: marknote_notes.owner_id

Request Method: POST
Request URL: http://localhost:8000/marknote/note
Django Version: 2.1
Python Executable: /Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/bin/python
Python Version: 3.7.0
Python Path: ['/Users/sheldonwoodward/Developer/projects/marknote', '/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python37.zip', '/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7', '/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/lib-dynload', '/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7/lib/python3.7', '/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages']
Server time: Tue, 21 Aug 2018 02:57:59 +0000
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'rest_framework',
 'rest_framework.authtoken',
 'marknote']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']


Traceback:

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/backends/utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/backends/sqlite3/base.py" in execute
  296.         return Database.Cursor.execute(self, query, params)

The above exception (NOT NULL constraint failed: marknote_notes.owner_id) was the direct cause of the following exception:

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/core/handlers/exception.py" in inner
  34.             response = get_response(request)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
  126.                 response = self.process_exception_by_middleware(e, request)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/core/handlers/base.py" in _get_response
  124.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/views/decorators/csrf.py" in wrapped_view
  54.         return view_func(*args, **kwargs)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/rest_framework/views.py" in dispatch
  483.             response = self.handle_exception(exc)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/rest_framework/views.py" in handle_exception
  443.             self.raise_uncaught_exception(exc)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/rest_framework/views.py" in dispatch
  480.             response = handler(request, *args, **kwargs)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/rest_framework/generics.py" in post
  244.         return self.create(request, *args, **kwargs)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/rest_framework/mixins.py" in create
  21.         self.perform_create(serializer)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/rest_framework/mixins.py" in perform_create
  26.         serializer.save()

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/rest_framework/serializers.py" in save
  214.             self.instance = self.create(validated_data)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/rest_framework/serializers.py" in create
  940.             instance = ModelClass.objects.create(**validated_data)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/query.py" in create
  413.         obj.save(force_insert=True, using=self.db)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/base.py" in save
  717.                        force_update=force_update, update_fields=update_fields)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/base.py" in save_base
  747.             updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/base.py" in _save_table
  830.             result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/base.py" in _do_insert
  868.                                using=using, raw=raw)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/query.py" in _insert
  1133.         return query.get_compiler(using=using).execute_sql(return_id)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
  1285.                 cursor.execute(sql, params)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/backends/utils.py" in execute
  100.             return super().execute(sql, params)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/backends/utils.py" in execute
  68.         return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/backends/utils.py" in _execute_with_wrappers
  77.         return executor(sql, params, many, context)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/backends/utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/utils.py" in __exit__
  89.                 raise dj_exc_value.with_traceback(traceback) from exc_value

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/backends/utils.py" in _execute
  85.                 return self.cursor.execute(sql, params)

File "/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/lib/python3.7/site-packages/django/db/backends/sqlite3/base.py" in execute
  296.         return Database.Cursor.execute(self, query, params)

Exception Type: IntegrityError at /marknote/note
Exception Value: NOT NULL constraint failed: marknote_notes.owner_id
Request information:
USER: sheldonwoodward

GET: No GET data

POST:
title = 'Test 1'
content = 'Test 1'

FILES: No FILES data

COOKIES: No cookie data

META:
Apple_PubSub_Socket_Render = '/private/tmp/com.apple.launchd.Ub5WC3uGKI/Render'
CLICOLOR = '1'
COLORFGBG = '15;0'
COLORTERM = 'truecolor'
CONTENT_LENGTH = '278'
CONTENT_TYPE = 'multipart/form-data; boundary=--------------------------010663819168948174069971'
DJANGO_SETTINGS_MODULE = 'django_server.settings'
GATEWAY_INTERFACE = 'CGI/1.1'
HOME = '/Users/sheldonwoodward'
HTTP_ACCEPT = '*/*'
HTTP_ACCEPT_ENCODING = 'gzip, deflate'
HTTP_AUTHORIZATION = 'Token f093f174c4e5df0e1ea2c0ed96b06e15ff210070'
HTTP_CACHE_CONTROL = 'no-cache'
HTTP_CONNECTION = 'keep-alive'
HTTP_HOST = 'localhost:8000'
HTTP_POSTMAN_TOKEN = '1a299d28-3fe5-4b44-afb0-bfaf812f450f'
HTTP_USER_AGENT = 'PostmanRuntime/7.2.0'
ITERM_PROFILE = 'Sheldon'
ITERM_SESSION_ID = 'w1t0p0:DEBAC83E-F158-4352-B9F7-A2E992591FAC'
LANG = 'en_US.UTF-8'
LOGNAME = 'sheldonwoodward'
LSCOLORS = 'GxBxhxDxfxhxhxhxhxcxcx'
PATH = '/Users/sheldonwoodward/.local/share/virtualenvs/marknote-1Se4K7YM/bin:/usr/local/Cellar/pipenv/2018.7.1/libexec/tools:/Applications/MAMP PRO/Library/bin/:/Applications/MAMP/Library/bin/:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/sheldonwoodward/.javacc-6.0/bin:/usr/local/opt/sqlite/bin:/Users/sheldonwoodward/.composer/vendor/bin'
PATH_INFO = '/marknote/note'
PIP_PYTHON_PATH = '/usr/local/Cellar/pipenv/2018.7.1/libexec/bin/python3.7'
PWD = '/Users/sheldonwoodward/Developer/projects/marknote'
PYTHONDONTWRITEBYTECODE = '1'
QUERY_STRING = ''
REMOTE_ADDR = '127.0.0.1'
REMOTE_HOST = ''
REQUEST_METHOD = 'POST'
RUN_MAIN = 'true'
SCRIPT_NAME = ''
SERVER_NAME = '1.0.0.127.in-addr.arpa'
SERVER_PORT = '8000'
SERVER_PROTOCOL = 'HTTP/1.1'
SERVER_SOFTWARE = 'WSGIServer/0.2'
SHELL = '/bin/bash'
SHLVL = '1'
SSH_AUTH_SOCK = '/private/tmp/com.apple.launchd.slrqyEZVoL/Listeners'
TERM = 'xterm-256color'
TERM_PROGRAM = 'iTerm.app'
TERM_PROGRAM_VERSION = '3.1.6'
TERM_SESSION_ID = 'w1t0p0:DEBAC83E-F158-4352-B9F7-A2E992591FAC'
TMPDIR = '/var/folders/kh/c1hbp5r97b9fbwqny9rr7cym0000gp/T/'
TZ = 'UTC'
USER = 'sheldonwoodward'
XPC_FLAGS = '0x0'
XPC_SERVICE_NAME = '0'
_ = '/usr/local/bin/pipenv'
__CF_USER_TEXT_ENCODING = '0x1F6:0x0:0x0'
wsgi.errors = <_io.TextIOWrapper name='<stderr>' mode='w' encoding='UTF-8'>
wsgi.file_wrapper = ''
wsgi.input = <_io.BufferedReader name=5>
wsgi.multiprocess = False
wsgi.multithread = True
wsgi.run_once = False
wsgi.url_scheme = 'http'
wsgi.version = '(1, 0)'

Settings:
Using settings module django_server.settings
ABSOLUTE_URL_OVERRIDES = {}
ADMINS = []
ALLOWED_HOSTS = []
APPEND_SLASH = True
AUTHENTICATION_BACKENDS = ['django.contrib.auth.backends.ModelBackend']
AUTH_PASSWORD_VALIDATORS = '********************'
AUTH_USER_MODEL = 'auth.User'
BASE_DIR = '/Users/sheldonwoodward/Developer/projects/marknote'
CACHES = {'default': {'BACKEND': 'django.core.cache.backends.locmem.LocMemCache'}}
CACHE_MIDDLEWARE_ALIAS = 'default'
CACHE_MIDDLEWARE_KEY_PREFIX = '********************'
CACHE_MIDDLEWARE_SECONDS = 600
CSRF_COOKIE_AGE = 31449600
CSRF_COOKIE_DOMAIN = None
CSRF_COOKIE_HTTPONLY = False
CSRF_COOKIE_NAME = 'csrftoken'
CSRF_COOKIE_PATH = '/'
CSRF_COOKIE_SAMESITE = 'Lax'
CSRF_COOKIE_SECURE = False
CSRF_FAILURE_VIEW = 'django.views.csrf.csrf_failure'
CSRF_HEADER_NAME = 'HTTP_X_CSRFTOKEN'
CSRF_TRUSTED_ORIGINS = []
CSRF_USE_SESSIONS = False
DATABASES = {'default': {'ENGINE': 'django.db.backends.sqlite3', 'NAME': '/Users/sheldonwoodward/Developer/projects/marknote/db.sqlite3', 'ATOMIC_REQUESTS': False, 'AUTOCOMMIT': True, 'CONN_MAX_AGE': 0, 'OPTIONS': {}, 'TIME_ZONE': None, 'USER': '', 'PASSWORD': '********************', 'HOST': '', 'PORT': '', 'TEST': {'CHARSET': None, 'COLLATION': None, 'NAME': None, 'MIRROR': None}}}
DATABASE_ROUTERS = []
DATA_UPLOAD_MAX_MEMORY_SIZE = 2621440
DATA_UPLOAD_MAX_NUMBER_FIELDS = 1000
DATETIME_FORMAT = 'N j, Y, P'
DATETIME_INPUT_FORMATS = ['%Y-%m-%d %H:%M:%S', '%Y-%m-%d %H:%M:%S.%f', '%Y-%m-%d %H:%M', '%Y-%m-%d', '%m/%d/%Y %H:%M:%S', '%m/%d/%Y %H:%M:%S.%f', '%m/%d/%Y %H:%M', '%m/%d/%Y', '%m/%d/%y %H:%M:%S', '%m/%d/%y %H:%M:%S.%f', '%m/%d/%y %H:%M', '%m/%d/%y']
DATE_FORMAT = 'N j, Y'
DATE_INPUT_FORMATS = ['%Y-%m-%d', '%m/%d/%Y', '%m/%d/%y', '%b %d %Y', '%b %d, %Y', '%d %b %Y', '%d %b, %Y', '%B %d %Y', '%B %d, %Y', '%d %B %Y', '%d %B, %Y']
DEBUG = True
DEBUG_PROPAGATE_EXCEPTIONS = False
DECIMAL_SEPARATOR = '.'
DEFAULT_CHARSET = 'utf-8'
DEFAULT_CONTENT_TYPE = 'text/html'
DEFAULT_EXCEPTION_REPORTER_FILTER = 'django.views.debug.SafeExceptionReporterFilter'
DEFAULT_FILE_STORAGE = 'django.core.files.storage.FileSystemStorage'
DEFAULT_FROM_EMAIL = 'webmaster@localhost'
DEFAULT_INDEX_TABLESPACE = ''
DEFAULT_TABLESPACE = ''
DISALLOWED_USER_AGENTS = []
EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'localhost'
EMAIL_HOST_PASSWORD = '********************'
EMAIL_HOST_USER = ''
EMAIL_PORT = 25
EMAIL_SSL_CERTFILE = None
EMAIL_SSL_KEYFILE = '********************'
EMAIL_SUBJECT_PREFIX = '[Django] '
EMAIL_TIMEOUT = None
EMAIL_USE_LOCALTIME = False
EMAIL_USE_SSL = False
EMAIL_USE_TLS = False
FILE_CHARSET = 'utf-8'
FILE_UPLOAD_DIRECTORY_PERMISSIONS = None
FILE_UPLOAD_HANDLERS = ['django.core.files.uploadhandler.MemoryFileUploadHandler', 'django.core.files.uploadhandler.TemporaryFileUploadHandler']
FILE_UPLOAD_MAX_MEMORY_SIZE = 2621440
FILE_UPLOAD_PERMISSIONS = None
FILE_UPLOAD_TEMP_DIR = None
FIRST_DAY_OF_WEEK = 0
FIXTURE_DIRS = []
FORCE_SCRIPT_NAME = None
FORMAT_MODULE_PATH = None
FORM_RENDERER = 'django.forms.renderers.DjangoTemplates'
IGNORABLE_404_URLS = []
INSTALLED_APPS = ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'rest_framework', 'rest_framework.authtoken', 'marknote']
INTERNAL_IPS = []
LANGUAGES = [('af', 'Afrikaans'), ('ar', 'Arabic'), ('ast', 'Asturian'), ('az', 'Azerbaijani'), ('bg', 'Bulgarian'), ('be', 'Belarusian'), ('bn', 'Bengali'), ('br', 'Breton'), ('bs', 'Bosnian'), ('ca', 'Catalan'), ('cs', 'Czech'), ('cy', 'Welsh'), ('da', 'Danish'), ('de', 'German'), ('dsb', 'Lower Sorbian'), ('el', 'Greek'), ('en', 'English'), ('en-au', 'Australian English'), ('en-gb', 'British English'), ('eo', 'Esperanto'), ('es', 'Spanish'), ('es-ar', 'Argentinian Spanish'), ('es-co', 'Colombian Spanish'), ('es-mx', 'Mexican Spanish'), ('es-ni', 'Nicaraguan Spanish'), ('es-ve', 'Venezuelan Spanish'), ('et', 'Estonian'), ('eu', 'Basque'), ('fa', 'Persian'), ('fi', 'Finnish'), ('fr', 'French'), ('fy', 'Frisian'), ('ga', 'Irish'), ('gd', 'Scottish Gaelic'), ('gl', 'Galician'), ('he', 'Hebrew'), ('hi', 'Hindi'), ('hr', 'Croatian'), ('hsb', 'Upper Sorbian'), ('hu', 'Hungarian'), ('ia', 'Interlingua'), ('id', 'Indonesian'), ('io', 'Ido'), ('is', 'Icelandic'), ('it', 'Italian'), ('ja', 'Japanese'), ('ka', 'Georgian'), ('kab', 'Kabyle'), ('kk', 'Kazakh'), ('km', 'Khmer'), ('kn', 'Kannada'), ('ko', 'Korean'), ('lb', 'Luxembourgish'), ('lt', 'Lithuanian'), ('lv', 'Latvian'), ('mk', 'Macedonian'), ('ml', 'Malayalam'), ('mn', 'Mongolian'), ('mr', 'Marathi'), ('my', 'Burmese'), ('nb', 'Norwegian Bokmål'), ('ne', 'Nepali'), ('nl', 'Dutch'), ('nn', 'Norwegian Nynorsk'), ('os', 'Ossetic'), ('pa', 'Punjabi'), ('pl', 'Polish'), ('pt', 'Portuguese'), ('pt-br', 'Brazilian Portuguese'), ('ro', 'Romanian'), ('ru', 'Russian'), ('sk', 'Slovak'), ('sl', 'Slovenian'), ('sq', 'Albanian'), ('sr', 'Serbian'), ('sr-latn', 'Serbian Latin'), ('sv', 'Swedish'), ('sw', 'Swahili'), ('ta', 'Tamil'), ('te', 'Telugu'), ('th', 'Thai'), ('tr', 'Turkish'), ('tt', 'Tatar'), ('udm', 'Udmurt'), ('uk', 'Ukrainian'), ('ur', 'Urdu'), ('vi', 'Vietnamese'), ('zh-hans', 'Simplified Chinese'), ('zh-hant', 'Traditional Chinese')]
LANGUAGES_BIDI = ['he', 'ar', 'fa', 'ur']
LANGUAGE_CODE = 'en-us'
LANGUAGE_COOKIE_AGE = None
LANGUAGE_COOKIE_DOMAIN = None
LANGUAGE_COOKIE_NAME = 'django_language'
LANGUAGE_COOKIE_PATH = '/'
LOCALE_PATHS = []
LOGGING = {}
LOGGING_CONFIG = 'logging.config.dictConfig'
LOGIN_REDIRECT_URL = '/accounts/profile/'
LOGIN_URL = '/accounts/login/'
LOGOUT_REDIRECT_URL = None
MANAGERS = []
MEDIA_ROOT = ''
MEDIA_URL = ''
MESSAGE_STORAGE = 'django.contrib.messages.storage.fallback.FallbackStorage'
MIDDLEWARE = ['django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware']
MIGRATION_MODULES = {}
MONTH_DAY_FORMAT = 'F j'
NUMBER_GROUPING = 0
PASSWORD_HASHERS = '********************'
PASSWORD_RESET_TIMEOUT_DAYS = '********************'
PREPEND_WWW = False
ROOT_URLCONF = 'django_server.urls'
SECRET_KEY = '********************'
SECURE_BROWSER_XSS_FILTER = False
SECURE_CONTENT_TYPE_NOSNIFF = False
SECURE_HSTS_INCLUDE_SUBDOMAINS = False
SECURE_HSTS_PRELOAD = False
SECURE_HSTS_SECONDS = 0
SECURE_PROXY_SSL_HEADER = None
SECURE_REDIRECT_EXEMPT = []
SECURE_SSL_HOST = None
SECURE_SSL_REDIRECT = False
SERVER_EMAIL = 'root@localhost'
SESSION_CACHE_ALIAS = 'default'
SESSION_COOKIE_AGE = 1209600
SESSION_COOKIE_DOMAIN = None
SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_NAME = 'sessionid'
SESSION_COOKIE_PATH = '/'
SESSION_COOKIE_SAMESITE = 'Lax'
SESSION_COOKIE_SECURE = False
SESSION_ENGINE = 'django.contrib.sessions.backends.db'
SESSION_EXPI

    

Answer 1

对于这种情况，我有一个干净的例程，我会解释的。首先，CurrentUserDefault不是在做一些神奇的事情，它只是返回request我们之前给序列化程序的用户（通用视图通过调用将请求传递给序列化程序get_serializer，因为您使用的是泛型，您做得很好）。

但出于我们的目的，我们将编写一个新的定制CurrentUserDefault，它将返回用户的 id：

class CurrentUserDefault(object):
    def set_context(self, serializer_field):
        self.user_id = serializer_field.context['request'].user.id

    def __call__(self):
        return self.user_id

    def __repr__(self):
        return unicode_to_repr('%s()' % self.__class__.__name__)

现在我们只是要使用这个 CurrentUserDefault 并填写 的owner_id字段NoteSummarySerializer，我建议你使用serializers.HiddenField，根据 drf 文档：

不根据用户输入取值的字段类，而是从默认值或可调用值中取值。

该字段将出现在validated_data 中，但不会在序列化器输出表示中使用。

所以它只从 获取它的值default or callable，所以它不是Changeable通过用户输入，也不会在序列化器输出表示中使用。看起来很棒，对吧？

我们只需将此字段添加到序列化程序：

class NoteSummarySerializer(serializers.ModelSerializer):
    owner_id = serializers.HiddenField(default=CurrentUserDefault())

    class Meta:
        model = Note
        fields = (
            'pk',
            'title',
            'containerId',
            'created',
            'updated',
            'owner_id', ### dont forget to add it to the fields.
        )

然后是最后一步，因为我们使用owner_idfo 填充所有者，因此该名称owner可用于其他用途。在这种情况下，我认为将其设置为 CharField 并owner.username为其提供（或您想要的任何内容）source并使其为readonlyTrue，因此我们的序列化程序最终会像：

class NoteSummarySerializer(serializers.ModelSerializer):
    owner_id = serializers.HiddenField(default=CurrentUserDefault())
    owner = serializers.CharField(source='owner.username', read_only=True)

    class Meta:
        model = Note
        fields = (
            'pk',
            'title',
            'containerId',
            'created',
            'updated',
            'owner_id',
            'owner'
        )