Question

我有这些模特：

@python_2_unicode_compatible
class Media(models.Model):
  the_image   = FilerImageField(null=True)
  title       = models.CharField(verbose_name="Title", max_length=255, null=True, blank=True)
  alt_text    = models.CharField(verbose_name="Alt Text", max_length=255, null=True, blank=True)

  created     = models.DateTimeField(default=now)
  modified    = models.DateTimeField(editable=True, auto_now=True)

  product_image_gallery   = models.ForeignKey('Product', related_name="product_image_gallery", null=True, blank=True, verbose_name="Product's Image Gallery")

  def __str__(self):
     return self.the_image.__str__()

@python_2_unicode_compatible
class Product( models.Model ):
  name    = models.CharField(verbose_name="Name", max_length=255)
  slug    = models.SlugField(verbose_name="Slug", max_length=255, unique=True)
  price       = models.PositiveIntegerField(verbose_name='Price', null=True, blank=True)
  sale_price  = models.PositiveIntegerField(verbose_name="Sale Price", null=True, blank=True)
  sku = models.CharField(verbose_name="SKU", max_length=255)

  def __str__(self):
    return "%s" % (self.sku, )

我有这些管理对象：

class Media_Admin(admin.ModelAdmin):
  search_fields       = ['id', 'the_image', 'title', 'product_image_gallery__sku']
  list_display        = ['the_image', 'image_tag', 'title', 'product_image_gallery', 'created']
  readonly_fields     = ('image_tag',)
  fieldsets = [
    ( "Data", {
        'classes': ('grp-collapse grp-open',),
        'fields': ['the_image', 'title', 'alt_text']}),
  ]
admin.site.register(Media, Media_Admin)

list_display工作正常，但搜索总是会出错：

Related Field got invalid lookup: icontains

我不知道自己做错了什么，我对SKU product_image_gallery__sku使用双下划线，但它仍然出错，我试过product_image_gallery这也是一个错误。

我的追踪：

Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/admin/mooimom_id/media/?q=A7005

Django Version: 1.10.7
Python Version: 2.7.13
Installed Applications:
['corsheaders',
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'tinymce',
 'easy_thumbnails',
 'filer',
 'mptt',
 'storages',
 'django_extensions']
    Installed Middleware:
    ['corsheaders.middleware.CorsMiddleware',
 'htmlmin.middleware.HtmlMinifyMiddleware',
 'htmlmin.middleware.MarkRequestMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'mooimom_django.mooimom_middleware.SimpleMiddleware',
 'ratelimitbackend.middleware.RateLimitMiddleware']



Traceback:

File "C:\Python27\lib\site-packages\django\core\handlers\exception.py" in inner
 42.             response = get_response(request)

File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
 185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in wrapper
 544.                 return self.admin_site.admin_view(view)(*args, **kwargs)

File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view
  149.                     response = view_func(request, *args, **kwargs)

 File "C:\Python27\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func
  57.         response = view_func(request, *args, **kwargs)

File "C:\Python27\lib\site-packages\django\contrib\admin\sites.py" in inner
  211.             return view(request, *args, **kwargs)

File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapper
  67.             return bound_func(*args, **kwargs)

File "C:\Python27\lib\site-packages\django\utils\decorators.py" in _wrapped_view
  149.                     response = view_func(request, *args, **kwargs)

File "C:\Python27\lib\site-packages\django\utils\decorators.py" in bound_func
  63.                 return func.__get__(self, type(self))(*args2, **kwargs2)

 File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in changelist_view
  1543.                 self.list_max_show_all, self.list_editable, self,

File "C:\Python27\lib\site-packages\django\contrib\admin\views\main.py" in __init__
78.         self.queryset = self.get_queryset(request)

File "C:\Python27\lib\site-packages\django\contrib\admin\views\main.py" in get_queryset
  346.         qs, search_use_distinct = self.model_admin.get_search_results(request, qs, self.query)

File "C:\Python27\lib\site-packages\django\contrib\admin\options.py" in get_search_results
  905.                 queryset = queryset.filter(reduce(operator.or_, or_queries))

File "C:\Python27\lib\site-packages\django\db\models\query.py" in filter
  796.         return self._filter_or_exclude(False, *args, **kwargs)

 File "C:\Python27\lib\site-packages\django\db\models\query.py" in _filter_or_exclude
  814.             clone.query.add_q(Q(*args, **kwargs))

 File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in add_q
   1227.         clause, _ = self._add_q(q_object, self.used_aliases)

File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in _add_q
   1247.                     current_negated, allow_joins, split_subq)

File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in _add_q
  1253.                     allow_joins=allow_joins, split_subq=split_subq,

File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in build_filter
   1178.             lookup_class = field.get_lookup(lookups[0])

File "C:\Python27\lib\site-packages\django\db\models\fields\related.py" in get_lookup
   694.             raise TypeError('Related Field got invalid lookup: %s' % lookup_name)

Exception Type: TypeError at /admin/mooimom_id/media/
Exception Value: Related Field got invalid lookup: icontains

Answer 1

原因是错误是因为

search_fields       = ['id', 'the_image', 'title', 'product_image_gallery__sku']

“the_image”是一个FilerImageField对象，它会导致错误。

当我把它变成：

时它会起作用

 search_fields       = ['id', 'title', 'product_image_gallery__sku']

Answer 2

只是想澄清为什么会出现此错误。您正在尝试def create @course = current_user.courses.build(course_params) # You need to set @course.listing_id to an existing Listing # You need to find that listing and save it in a variable. # I am not getting into your logic, because your code is confused and need many adjustments listing = Listing.find() # include hear your logic to find an existing listing from the db @course.listing_id = listing.id if @course.save! redirect_to course_listing_path(@course), notice: "Saved..." else render :new, notice: "Something went wrong..." end end上的允许搜索。但由于此字段的类型为the_image，因此Django无法为此类搜索提供可接受的查询。

幕后

这是来自Django文档：

当有人在管理搜索框中搜索时，Django会分割将查询搜索到单词并返回包含每个对象的所有对象单词不区分大小写，每个单词必须至少有一个 search_fields。

因此，如果您想允许搜索，您可能希望添加字段FilerImageField，我假设它是图像的名称。这样，人们就可以按名字搜索图像。

希望它有所帮助！

django admin相关字段无效查找：icontains

2 个答案: