为什么MyPage._meta.get_field(“ title”)。verbose_name会更改Wagtail中所有标题的标签?

时间:2019-12-11 16:15:05

标签: django django-models wagtail

我在Wagtail项目中有一些应用程序,其中一个是“新闻”,其中包含新闻(页面)。我想在管理员中将标题的标签“ title”覆盖为“ headline”。

News._meta.get_field("title").verbose_name = "Headline"

结果,我在所有应用程序和页面中都获得了所有标题的标签“标题”。为什么我会有这种奇怪的效果?

更新:

# news/models.py

class NewsDetails(Page):
    template = "news/news_details.html"

    news_text = RichTextField(features=['h2', 'h3', 'bold', 'italic', 'link', 'ol', 'ul',])
    news_image = models.ForeignKey(
        "wagtailimages.Image",
        null=True,
        blank=False,
        on_delete=models.SET_NULL,
    )

    content_panels = Page.content_panels + [
        ImageChooserPanel("news_image"),
        FieldPanel("news_text")
    ]

    class Meta:
        verbose_name = "News"

    parent_page_types = ['news.NewsList']


NewsDetails._meta.get_field("title").verbose_name = "Headline"

3 个答案:

答案 0 :(得分:3)

此方法的问题在于,当您运行django-admin.py makemigrations命令时,Django将为Wagtail核心生成迁移(即使它是通过pip安装的)。

为避免这种情况,最好在NewsDetails模型中使用自定义base_form_class。这种方法也适用于更改其他属性,例如help_text

from wagtail.admin.forms import WagtailAdminPageForm

class NewsDetailsForm(WagtailAdminPageForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        # Manually edit the default forms title attributes:
        title = self.fields['title']
        title.verbose_name="Headline"
        title.help_text="Some headline..."


class NewsDetails(Page):
    template = "news/news_details.html"

    news_text = RichTextField(features=['h2', 'h3', 'bold', 'italic', 'link', 'ol', 'ul',])
    news_image = models.ForeignKey(
        "wagtailimages.Image",
        null=True,
        blank=False,
        on_delete=models.SET_NULL,
    )

    content_panels = Page.content_panels + [
        ImageChooserPanel("news_image"),
        FieldPanel("news_text")
    ]

    class Meta:
        verbose_name = "News"

    parent_page_types = ['news.NewsList']

    # Important line below:
    base_form_class = NewsDetailsForm

答案 1 :(得分:3)

对Nathan的答案进行了些微更改,从而解决了verbose_name不起作用的Valery问题。设置title.label而不是title.verbose_name

class NewsDetailsForm(WagtailAdminPageForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        # Manually edit the default form's title attributes:
        title = self.fields['title']
        title.label = "Headline"
        title.help_text = "Some headline..."

原因是我们现在正在处理django.forms.Field而不是django.db.models.Field。请参见django.db.models.Field.formfield()中的代码:

    def formfield(self, form_class=None, choices_form_class=None, **kwargs):
        """Return a django.forms.Field instance for this field."""
        defaults = {
            'required': not self.blank,
            'label': capfirst(self.verbose_name),
            'help_text': self.help_text,
        }

        ...

        return form_class(**defaults)

答案 2 :(得分:0)

也许可以通过在模型类中添加 init 方法,如下所示:

class NewsDetails(Page):
...
    def __init__(self, *args, **kwargs):
        super(NewsDetails, self).__init__(*args, **kwargs)
        self._meta.get_field('title').verbose_name = 'Headline'
...

我认为必须对模型中定义的所有类都执行此操作,否则, Page 中的子类将具有最后更新的标签。例如,在这里,如果我将 Page 子类化以创建一个新类,则将看到 Headline 作为标题标签,而应该看到默认标签 Title