python - 内联 ModelAdmin 的 Django 管理员验证

Question

我在管理页面中使用表格内联，其中的指令可能有多个 scrap_code 和 event_code。但一个 scrap_code 或 event_code 不能有多个指令。我在整个表中制作了 scrap_code 和 event_code，以便它们不能重复。

我的admin.py

class InstructionAdmin(admin.ModelAdmin):
    inlines = [ ScrapEventInstructionMapInline, ]
    fields=('name',)
    form = InstructionMapForm

当用户尝试输入已存在的 event_code 或 scrap_code 时，我需要向用户显示警报。但问题是即使我们有数据指令，s_code 和 e_code 作为 None

我的 forms.py 文件:-

class InstructionMapForm(forms.ModelForm):

    def clean(self):
        instruction = self.cleaned_data.get('instruction')
        s_code      = self.cleaned_data.get('scrap_code')
        e_code      = self.cleaned_data.get('event_code')

        qs = ScrapEventInstructionMap.objects.all()
        if s_code:
            dup_scrap = list(ScrapEventInstructionMap.objects.filter(scrap_code=s_code).values('scrap_code'))
            if dup_scrap:
                raise forms.ValidationError ('The Scrap Code provided ({}) already exists, kindly edit it or provide another Scrap Code'.format(s_code))

        elif e_code:
            dup_event = list(ScrapEventInstructionMap.objects.filter(event_code=e_code).values('event_code'))
            if dup_event:
                raise forms.ValidationError ('The Event Code provided ({}) already exists, kindly edit it or provide another Event Code'.format(e_code))

如何获取数据避免无？以及如何向用户显示警报？

Answer 1

class ScrapEventInstructionAdminFormset(forms.models.BaseInlineFormSet):

    def clean(self):
        forms = [form for form in self.forms if not form.cleaned_data.get('DELETE')]
        for form in forms:
            scrap_code = form.cleaned_data.get('scrap_code')
            event_code = form.cleaned_data.get('event_code')
            if form.instance.id:
                scp = SCPInstruction.objects.exclude(id=form.instance.id)
                is_scrap_code_exists = scp.filter(instruction=form.instance.instruction, scrap_code=scrap_code)
                is_event_code_exists = scp.filter(instruction=form.instance.instruction, event_code=event_code)
            else:
                is_scrap_code_exists = SCPInstruction.objects.filter(instruction=form.instance.instruction, scrap_code=scrap_code)
                is_event_code_exists = SCPInstruction.objects.filter(instruction=form.instance.instruction, event_code=event_code)

            if is_scrap_code_exists:
                form.add_error('scrap_code', 'The Scrap Code provided ({}) already exists, kindly edit it or provide another Scrap Code'.format(scrap_code))
            if is_event_code_exists:
                form.add_error('event_code', 'The Event Code provided ({}) already exists, kindly edit it or provide another Event Code'.format(event_code))

        return self.forms