Question

我有一些类似的模型：

class BaseModel(models.Model):
    created_by = models.ForeignKey(User, related_name="%(app_label)s_%(class)s_created")
    created_date = models.DateTimeField(_('Added date'), auto_now_add=True)
    last_updated_by = models.ForeignKey(User, related_name="%(app_label)s_%(class)s_updated")
    last_updated_date = models.DateTimeField(_('Last update date'), auto_now=True)

    class Meta:
        abstract = True

class Image(BaseModel):
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey('content_type', 'object_id')

    name = models.CharField(_('Item name'), max_length=200, blank=True)
    image = models.ImageField(_('Image'), upload_to=get_upload_path)

    def save(self, *args, **kwargs):
        if self.image and not GALLERY_ORIGINAL_IMAGESIZE == 0:
            width, height = GALLERY_ORIGINAL_IMAGESIZE.split('x')
            super(Image, self).save(*args, **kwargs)

            filename = os.path.join( settings.MEDIA_ROOT, self.image.name )
            image = PILImage.open(filename)

            image.thumbnail((int(width), int(height)), PILImage.ANTIALIAS)
            image.save(filename)

        super(Image, self).save(*args, **kwargs)

class Album(BaseModel):
    name = models.CharField(_('Album Name'), max_length=200)
    description = models.TextField(_('Description'), blank=True)
    slug = models.SlugField(_('Slug'), max_length=200, blank=True)
    status = models.SmallIntegerField(_('Status'),choices=ALBUM_STATUSES)

    images = generic.GenericRelation(Image)

我为所有模型使用BaseModel抽象模型来跟踪保存和更新日志。我可以使用ModelAdmin类自动设置用户字段：

class BaseAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        if not change:
            obj.created_by = request.user

        obj.last_updated_by = request.user
        obj.save()


class AlbumAdmin(BaseAdmin):
    prepopulated_fields = {"slug": ("name",)}
    list_display = ('id','name')
    ordering = ('id',)

有效。所有BaseAdmin字段都会自动填充。但我想通过Inline将图像添加到相册中。所以，我改变了我的admin.py：

from django.contrib.contenttypes import generic

class ImageInline(generic.GenericTabularInline):
    model = Image
    extra = 1

class AlbumAdmin(BaseAdmin):
    prepopulated_fields = {"slug": ("name",)}
    list_display = ('id','name')
    ordering = ('id',)

    inlines = [ImageInline,]

当我保存页面时，我在Image model save方法的第一行gallery_image.created_by_id may not be NULL行收到错误：super(Image, self).save(*args, **kwargs)。我知道这是因为GenericTabularInline类没有“save_model”方法来覆盖。

所以，问题是，我如何覆盖保存方法并在InlineModelAdmin类中设置当前用户？

Answer 1

我找到了另一个问题的解决方案：https://stackoverflow.com/a/3569038/198062

所以，我改变了我的BaseAdmin模型类，它就像一个魅力：

from models import BaseModel

class BaseAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        if not change:
            obj.created_by = request.user

        obj.last_updated_by = request.user
        obj.save()

    def save_formset(self, request, form, formset, change):
        instances = formset.save(commit=False)

        for instance in instances:
            if isinstance(instance, BaseModel): #Check if it is the correct type of inline
                if not instance.created_by_id:
                    instance.created_by = request.user

                instance.last_updated_by = request.user            
                instance.save()

请注意，您必须为包含内联的ModelAdmin扩展相同的抽象类以使用此解决方案。或者，您可以将该save_formset方法添加到专门包含内联的ModelAdmin。

Answer 2

无论操作在何处/如何操作，我都希望将用户设置在我的所有模型上。我花了很长时间才弄清楚，但这里是如何使用中间件在任何模型上设置它：

"""Add user created_by and modified_by foreign key refs to any model automatically.
   Almost entirely taken from https://github.com/Atomidata/django-audit-log/blob/master/audit_log/middleware.py"""
from django.db.models import signals
from django.utils.functional import curry

class WhodidMiddleware(object):
    def process_request(self, request):
        if not request.method in ('GET', 'HEAD', 'OPTIONS', 'TRACE'):
            if hasattr(request, 'user') and request.user.is_authenticated():
                user = request.user
            else:
                user = None

            mark_whodid = curry(self.mark_whodid, user)
            signals.pre_save.connect(mark_whodid,  dispatch_uid = (self.__class__, request,), weak = False)

    def process_response(self, request, response):
        signals.pre_save.disconnect(dispatch_uid =  (self.__class__, request,))
        return response

    def mark_whodid(self, user, sender, instance, **kwargs):
        if instance.has_attr('created_by') and not instance.created_by:
            instance.created_by = user
        if instance.has_attr('modified_by'):
            instance.modified_by = user

Answer 3

除了心灵的回答;当created_by字段恰好有null=True时，not instance.created_by会出错。我使用instance.created_by_id is None来避免这种情况。

（我宁愿发布这个作为对答案的评论，但我目前的声誉不允许......）

Django：在模型上设置当前用户以在InlineModelAdmin中使用

3 个答案: