Django admin - 通过内联自动将当前用户保存到模型？

Question

我有以下内容，当我尝试通过管理页面上传文档以进行处理时，它会抛出错误。使用内联时如何自动填充文档模型的 entered_by 字段？

错误:/admin/myapp/proceeding/6/change/处出现 IntegrityError(1048, "'entered_by_id' 列不能为空")

# models.py
class Proceeding(models.model):
    date = models.DateField()
    entered_by = models.ForeignKey(User)

class Document(TimeStampedUserModel):
    proceeding = models.ForeignKey(Proceeding)
    document = models.FileField(upload_to='documents/')
    entered_by = models.ForeignKey(User)


#admin.py
class DocumentAdmin(admin.ModelAdmin):
    fields = ('proceeding', 'document', )
    list_display = ('proceeding', 'entered_by', )

    def save_model(self, request, obj, form, change):
        instance = form.save(commit=False)
        instance.entered_by = request.user
        instance.save()
        form.save_m2m()
        return instance
    def save_formset(self, request, form, formset, change):
        def set_user(instance):
            instance.entered_by = request.user
            instance.save()
        if formset.model == Document:
            instances = formset.save(commit=False)
            map(set_user, instances)
            formset.save_m2m()
            return instances
        else:
            return formset.save()

class DocumentInline(admin.TabularInline):
    model = Document
    fields = (
        'proceeding',
        'document',
    )
    extra = 0

class ProceedingAdmin(admin.ModelAdmin):
    inlines = [DocumentInline, ]
    fields = ('date',)
    list_display = ('date', 'entered_by',  )

    def save_model(self, request, obj, form, change):
        instance = form.save(commit=False)
        instance.entered_by = request.user
        instance.save()
        form.save_m2m()
        return instance
    def save_formset(self, request, form, formset, change):
        def set_user(instance):
            instance.entered_by = request.user
            instance.save()
        if formset.model == Proceeding:
            instances = formset.save(commit=False)
            map(set_user, instances)
            formset.save_m2m()
            return instances
        else:
            return formset.save()

Answer 1

example in the docs save_formset 展示了如何做到这一点。使用 commit=False 保存表单集，然后遍历实例并将 entered_by 字段设置为 request.user。

class ProceedingAdmin(admin.ModelAdmin):
    ...
    def save_formset(self, request, form, formset, change):
        instances = formset.save(commit=False)
        for obj in formset.deleted_objects:
            obj.delete()
        for instance in instances:
            instance.entered_by = request.user
            instance.save()
        formset.save_m2m()

请注意，您的 DocumentAdmin 不需要 save_formset 方法，因为它没有任何内联。