管理模型不能识别继承的字段 [英] Admin Models do not recognize inherited fields

问题描述

我想知道这是django.admin，django还是python的特定内容？但是如果我无法访问他们的字段，我并不真正理解抽象超类的含义:-)。我做错了什么？

I am wondering if this is something specific to django.admin, django, or even python? But I don't really understand the point in having abstract super classes if I cannot access their fields :-). Have I done something wrong?

示例：
我收到一个FieldError，并为Module指定了以下异常值：未知字段（creation_date）。如果我使用管理界面获取以下模型Module，请检查ModuleAdmin类的字段/ fieldsets / exclude属性：

Example: I get a FieldError with the following "Exception Value: Unknown field(s) (creation_date) specified for Module. Check fields/fieldsets/exclude attributes of class ModuleAdmin" if I use the admin interface to get the following model "Module":

class GeneralModel(models.Model):
    creation_date = models.DateTimeField('date of creation', auto_now_add=True)
    edited_date = models.DateTimeField('date of last modification', auto_now=True)

    class Meta:
        abstract = True


class Module(GeneralModel):
    name = models.CharField(max_length=100)
    shortDescription = models.CharField("summary", max_length=100)
    description = models.CharField("description", max_length=1500)
    authors = models.ManyToManyField("Author", through="Authorship")

    def __unicode__(self):
        return self.name

使用以下ModelAdmin代码：

With the following ModelAdmin Code:

class ModuleAdmin(admin.ModelAdmin):
    def formfield_for_dbfield(self, db_field, **kwargs):
        formfield = super(ModuleAdmin, self).formfield_for_dbfield(db_field, **kwargs)
        if db_field.name == 'description':
            formfield.widget = forms.Textarea(attrs=formfield.widget.attrs)
        return formfield
    fieldsets = [
        ("General", {"fields": ["name", "shortDescription"]}),
        ("Details", {"fields": ["description", "creation_date"], "classes": ["collapse"]})
    ]

推荐答案

您的问题与答案有关：
https://stackoverflow.com/a/3594927/3006165

Your problem is related to the answer: https://stackoverflow.com/a/3594927/3006165

错误是由于date有auto_now_add = True（或auto_now = True）。
由于该值是自动的，因此它不可编辑，因此它不是

The error is due to date having auto_now_add=True (or auto_now=True). As the value is automatic, it's not editable, so it's not in the form

根据该文档： p>

According to the documentantion:

字段选项...只有在
readonly_fields中列出时才可能包含调用。

The fields option ... may contain callables only if they are listed in readonly_fields.

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