python - 如何将不可编辑的字段添加到 Django 中的自定义管理表单

Question

我正在尝试将 editable=False 字段添加到自定义管理表单，但出现错误:

django.core.exceptions.FieldError: 'help_num' cannot be specified for 
Investigation model form as it is a non-editable field

这是真的，在我的模型中我是这样设置的:

模型.py

help_num = models.CharField(max_length=17, unique=True, default=increment_helpdesk_number, editable=False)

表单.py

class HelpDeskModelForm(forms.ModelForm):

    class Meta:
      model = HelpDesk
      fields = [
          "help_num",
          "help_types",
           ...
          "help_summary"
          ]

管理员.py

class HelpDeskModelAdmin(admin.ModelAdmin):
    readonly_fields=('help_num',)
    form = HelpDeskModelForm

我将 readonly 添加到 admin.py，但仍然出现错误。我做错了什么？

Answer 1

您需要从您的类(class)表单字段列表中删除不可编辑的字段:

class HelpDeskModelForm(forms.ModelForm):

    class Meta:
      model = HelpDesk
      fields = [
          #"help_num",
          "help_types",
           ...
          "help_summary"
          ]

并像您一样在 ModelAdmin 中保留只读字段:

class HelpDeskModelAdmin(admin.ModelAdmin):
    readonly_fields=('help_num',)
    form = HelpDeskModelForm