python - ImportError：无法导入名称“FieldPanel”（Wagtail）

Question

当我尝试创建 abstractUser 模型类时，我在输入AUTH_USER_MODEL = 'blog.Usersettings.py 后收到此错误消息，我遵循 Wagtail 自定义用户模型示例The Link to the site。

我正在使用 Django 1.11.3 和 wagtail 2.0，python 3.5.4

Sitename = mysite

Appname = Blog

Model = Models.py用户类

堆栈跟踪

(wagtail-9p7xWA1-) 0-10:22-/mnt/c/dev/wagtail/mysite (master) $ ./manage.py runserver

.wrapper 在 0x7fc502ce8840 > Traceback 启动的线程中未处理的异常（最近一次调用最后一次）：文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/django/ utils/autoreload.py”，第 227 行，在包装器 fn(*args, **kwargs) 文件中“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/ django/core/management/commands/runserver.py”，第 117 行，inner_run autoreload.raise_last_exception() 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site- packages/django/utils/autoreload.py”，第 250 行，在 raise_last_exception 六.reraise(*_exception) 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-包/django/utils/six.py”，第 685 行，在 reraise raise value.with_traceback(tb) 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/django/utils/autoreload.py”，第 227 行，在包装器 fn(*args, **kwargs) 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/django/init .py”，第 27 行，在 setup apps.populate(settings.INSTALLED_APPS) 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/django/apps /registry.py”，第 108 行，在填充 app_config.import_models() 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/django/apps/config .py”，第 202 行，在 import_models self.models_module = import_module(models_module_name) 文件“ /home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/importlib/init.py”，第 126 行，在 import_module 中 return _bootstrap._gcd_import(name[level:], package, level) 文件“”，第 986 行，在 _gcd_import 文件中“”，第 969 行，在 _find_and_load 文件中“”，第 958 行，在_find_and_load_unlocked 文件“”，第 673 行，在 _load_unlocked
文件“”，第 665 行，在 exec_module 中 文件“”，第 222 行，在 _call_with_frames_removed 文件“/mnt/c/dev/wagtail/mysite/home/models.py”，第 5 行，在 from wagtail.admin.edit_handlers import FieldPanel文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/wagtail/admin/edit_handlers.py”，第 23 行，从 .forms 导入（#NOQA 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/wagtail/admin/forms.py”，第 6 行，来自 django.contrib.auth.forms 导入AuthenticationForm，PasswordResetForm 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/django/contrib/auth/forms.py”，第 22 行，在 UserModel = get_user_model （） 文件 ”/home/用户名/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/django/contrib/auth/init .py”，第 193 行，在 get_user_model 返回 django_apps.get_model(settings.AUTH_USER_MODEL, require_ready=False) 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site- packages/django/apps/registry.py”，第 203 行，在 get_model app_config.import_models() 文件“/home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/site-packages/ django/apps/config.py”，第 202 行，在 import_models self.models_module = import_module(models_module_name) 文件“ /home/Username/.local/share/virtualenvs/wagtail-9p7xWA1-/lib/python3.5/importlib/init.py”，第 126 行，在 import_module 返回 _bootstrap._gcd_import(name[level:], package, level) 文件“/mnt/c/dev/wagtail/mysite/blog/models.py”，第 17 行，来自 wagtail .admin.edit_handlers 导入 FieldPanel、MultiFieldPanel、\

ImportError：无法导入名称“FieldPanel”

如果我这样做，一些代码

博客/Models.py

from django import forms
from django.db import models


from modelcluster.fields import ParentalKey, ParentalManyToManyField
from modelcluster.contrib.taggit import ClusterTaggableManager
from taggit.models import TaggedItemBase

from wagtail.core.models import Page, Orderable
from wagtail.snippets.models import register_snippet
from wagtail.core.fields import RichTextField, StreamField
from wagtail.core.blocks import StructBlock, TextBlock, StreamBlock, \
    EmailBlock, CharBlock, RichTextBlock
from wagtail.images.blocks import ImageChooserBlock
from wagtail.embeds.blocks import EmbedBlock
from wagtail.admin.edit_handlers import FieldPanel, MultiFieldPanel, \
    InlinePanel, StreamFieldPanel
from wagtail.images.edit_handlers import ImageChooserPanel
from wagtail.search import index

richtext_features = [
    'h1', 'h2', 'h3', 'hr',
    'bold', 'italic', 'link',
    'ol', 'ul', 'embed', 'image',
]



class BlogIndexPage(Page):

    intro = RichTextField(blank=True)

    def get_context(self, request):

        # Update context to include only published posts, ordered by reverse-chron
        context = super().get_context(request)
        blogpages = self.get_children().live().order_by('-first_published_at')
        context['blogpages'] = blogpages
        return context


class BlogPageTag(TaggedItemBase):
    content_object = ParentalKey(
        'BlogPage',
        related_name='tagged_items',
        on_delete=models.CASCADE
    )


class BlogTagIndexPage(Page):

    def get_context(self, request):

        tag = request.GET.get('tag')
        blogpages = BlogPage.objects.filter(tags__name=tag)

        context = super().get_context(request)
        context['blogpages'] = blogpages
        return context


class BlogPage(Page):
    date = models.DateField("Post date")
    intro = models.CharField(max_length=250)
    body = RichTextField(blank=True)
    tags = ClusterTaggableManager(through=BlogPageTag, blank=True)
    categories = ParentalManyToManyField('blog.BlogCategory', blank=True)
    feed_image = models.ForeignKey(
        'wagtailimages.Image',
        null=True,
        blank=True,
        on_delete=models.SET_NULL,
        related_name='+'
    )

    def main_image(self):
        gallery_item = self.gallery_images.first()
        if gallery_item:
            return gallery_item.image
        else:
            return None

    search_fields = Page.search_fields + [
        index.SearchField('intro'),
        index.SearchField('body'),
        index.FilterField('date'),
    ]

    content_panels = Page.content_panels + [
        MultiFieldPanel([
            FieldPanel('date'),
            FieldPanel('tags'),
            FieldPanel('categories', widget=forms.CheckboxSelectMultiple),
        ], heading="Blog information"),
        FieldPanel('intro'),
        FieldPanel('body', classname="full"),
        InlinePanel('gallery_images', label="Gallery Images"),
    ]

    promote_panels = [
        MultiFieldPanel(Page.promote_panels, 'Common page Config'),
        ImageChooserPanel('feed_image'),
    ]


class BlogPageRelatedLink(Orderable):
    page = ParentalKey(BlogPage, related_name='related_links')
    name = models.CharField(max_length=255)
    url = models.URLField()

    panels = [
        FieldPanel('name'),
        FieldPanel('url'),
    ]


class BlogPageGalleryImage(Orderable):
    page = ParentalKey(
        BlogPage,
        on_delete=models.CASCADE,
        related_name='gallery_images'
    )

    image = models.ForeignKey(
        'wagtailimages.Image',
        on_delete=models.CASCADE,
        related_name='+'
    )

    caption = models.CharField(blank=True, max_length=250)

    panels = [
        ImageChooserPanel('image'),
        FieldPanel('caption')
    ]


class PersonBlock(StructBlock):
    name = CharBlock(icon="user")
    image = ImageChooserBlock(required=False, icon="image")
    email = EmailBlock(icon="mail")

    class Meta:
        template = 'blocks/person.html'


class TwoColumnBlock(StructBlock):

    left_column = PersonBlock(icon='arrow-right', label='Left column content')
    right_column = PersonBlock(icon='arrow-right', label='Right column content')

    class Meta:
        template = 'blocks/person.html'
        icon = 'user'
        label = 'Two Columns'


class StoryBlock(StreamBlock):
    title = TextBlock(classname="full title")
    text = RichTextBlock(features=richtext_features)

    class Meta:
        icon = 'bold'
        template = 'blocks/column.html'


class TwoStoryBlock(StructBlock):

    left_column = StoryBlock(icon='arrow-right', label='Left column content')
    right_column = StoryBlock(icon='arrow-right', label='Right column content')

    class Meta:
        template = 'blocks/two_column_block.html'
        icon = 'bold'


class BackgroundBlock(StructBlock):
    background = ImageChooserBlock(icon="image")
    streamblock = StreamBlock(
        [
            ('title', CharBlock(classname="full title")),
            ('person', PersonBlock()),
            ('twocolumnblock', TwoColumnBlock()),
            ('twostoryblock', TwoStoryBlock()),
            ('richtext', RichTextBlock(features=richtext_features)),
        ],
        required=False
    )

    class Meta:
        icon = 'cogs'
        template = 'blocks/background.html'


class BackgroundNoButtonBlock(StructBlock):
    background = ImageChooserBlock(icon="image")
    streamblock = StreamBlock(
        [
            ('title', CharBlock(classname="full title")),
            ('richtext', RichTextBlock(features=richtext_features)),
        ],
        required=False
    )

    class Meta:
        icon = 'cogs'
        template = 'blocks/background_no_button.html'


class TextAndImageBlock (StreamBlock):
    text = RichTextBlock(features=richtext_features)
    image = ImageChooserBlock()

    class Meta:
        icon = 'bold'
        template = 'blocks/column.html'


class TwoTextAndImageBlock(StructBlock):
    left_column = TextAndImageBlock(icon='arrow-right', label='Left column content')
    right_column = TextAndImageBlock(icon='arrow-right', label='Right column content')

    class Meta:
        template = 'blocks/two_column_block.html'
        icon = 'bold'


class LandingPage(Page):
    body = StreamField(
        [
            ('heading', CharBlock(classname="full title")),
            ('paragraph', RichTextBlock()),
            ('backgroundnobutton', BackgroundNoButtonBlock()),
            ('background', BackgroundBlock(max_num=10, block_counts={'video': {'max_num': 2}})),
            ('embedded_video', EmbedBlock(icon="media")),
            ('twostoryblock', TwoStoryBlock(icon="bold")),
            ('two_column_block', TwoColumnBlock(icon="view")),
            ('textandimage', TwoTextAndImageBlock()),
        ],
        null=True,
        blank=True
    )

    content_panels = Page.content_panels + [
        StreamFieldPanel('body'),
    ]


@register_snippet
class BlogCategory(models.Model):
    name = models.CharField(max_length=255)
    icon = models.ForeignKey(
        'wagtailimages.Image', null=True, blank=True,
        on_delete=models.SET_NULL, related_name='+'
    )

    panels = [
        FieldPanel('name'),
        ImageChooserPanel('icon'),
    ]

    def __str__(self):
        return self.name

    class Meta:
        verbose_name_plural = 'blog categories'

设置/base.py

     import os

PROJECT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
BASE_DIR = os.path.dirname(PROJECT_DIR)


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.0/howto/deployment/checklist/


# Application definition

INSTALLED_APPS = [
    'home',
    'search',

    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'blog',
    'users',
    'wagtail.contrib.forms',
    'wagtail.contrib.redirects',
    'wagtail.embeds',
    'wagtail.sites',
    'wagtail.users',
    'wagtail.snippets',
    'wagtail.documents',
    'wagtail.images',
    'wagtail.search',
    'wagtail.admin',
    'wagtail.core',

    'modelcluster',
    'taggit',
]

MIDDLEWARE = [
    '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',
    'django.middleware.security.SecurityMiddleware',

    'wagtail.core.middleware.SiteMiddleware',
    'wagtail.contrib.redirects.middleware.RedirectMiddleware',
]

ROOT_URLCONF = 'mysite.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [
            os.path.join(PROJECT_DIR, 'templates'),
        ],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'mysite.wsgi.application'


# Database
# https://docs.djangoproject.com/en/2.0/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}
WAGTAILGRIDDER_CLEAR_CACHE = False

# Password validation
# https://docs.djangoproject.com/en/2.0/ref/settings/#auth-password-validators
AUTH_USER_MODEL = 'users.User'
AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/2.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.0/howto/static-files/

STATICFILES_FINDERS = [
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
]

STATICFILES_DIRS = [
    os.path.join(PROJECT_DIR, 'static'),
]

STATIC_ROOT = os.path.join(BASE_DIR, 'static')
STATIC_URL = '/static/'

MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
MEDIA_URL = '/media/'


# Wagtail settings

WAGTAIL_SITE_NAME = "mysite"

# Base URL to use when referring to full URLs within the Wagtail admin backend -
# e.g. in notification emails. Don't include '/admin' or a trailing slash
BASE_URL = 'http://example.com'

*用户/模型.py *

from django.db import models
from django.contrib.auth.models import AbstractUser


class User(AbstractUser):
    pass