我想在我的网络应用中添加文字搜索功能。我在postgres中为三个字段创建了一个索引。我无法弄清楚你如何从django视图中查询索引。
索引命名为＆＃39; search_index＆＃39;当我尝试查询search_index时，我收到一个字段错误。
def search(request):
# search_index
#products = Product.objects.defer('product_description', 'product_keywords', 'shipping_cost', 'promotional_text', 'condition', 'warranty', 'stock', 'sku')
#product_count = products.count()
query = request.GET.get("q")
if query:
# product = products.filter(
# Q(product_name__icontains=query) |
# Q(product_description__icontains=query) |
# Q(product_keywords__icontains=query)
# )
product = Product.objects.filter(search_index__search=query)
# if product.order_by('sale_price'):
# product = product.order_by('sale_price')
# else:
# product = product.order_by('-price')
paginator = Paginator(product, 20)
page = request.GET.get('page')
try:
product = paginator.page(page)
except PageNotAnInteger:
product = paginator.page(1)
except EmptyPage:
product = paginator.page(paginator.num_pages)
index = product.number - 1
max_index = len(paginator.page_range)
start_index = index - 5 if index >= 5 else 0
end_index = index + 5 if index <= max_index - 5 else max_index
page_range = paginator.page_range[start_index:end_index]
context = {"product": product, "page_range": page_range, "query": query,}
template = "search.html"
else:
template = "search.html"
context = {
"query": query,
#"product_count": product_count,
}
return render(request, template, context)
回溯
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/search/?q=born
Django Version: 1.10.6
Python Version: 3.6.0
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'whitenoise.runserver_nostatic',
'django.contrib.sitemaps',
'django.contrib.sites',
'django.contrib.flatpages',
'crispy_forms',
'products',
'blog',
'newsletter',
'debug_toolbar']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.gzip.GZipMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware',
'debug_toolbar.middleware.DebugToolbarMiddleware']
Traceback:
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
42. response = get_response(request)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view
149. response = view_func(request, *args, **kwargs)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view
149. response = view_func(request, *args, **kwargs)
File "/Users/Tommy/Desktop/django/compare/compare/compare/views.py" in search
31. product = Product.objects.filter(search_index__search=query)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/db/models/manager.py" in manager_method
85. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/db/models/query.py" in filter
796. return self._filter_or_exclude(False, *args, **kwargs)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/db/models/query.py" in _filter_or_exclude
814. clone.query.add_q(Q(*args, **kwargs))
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/db/models/sql/query.py" in add_q
1227. clause, _ = self._add_q(q_object, self.used_aliases)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/db/models/sql/query.py" in _add_q
1253. allow_joins=allow_joins, split_subq=split_subq,
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/db/models/sql/query.py" in build_filter
1133. lookups, parts, reffed_expression = self.solve_lookup_type(arg)
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/db/models/sql/query.py" in solve_lookup_type
1019. _, field, _, lookup_parts = self.names_to_path(lookup_splitted, self.get_meta())
File "/Users/Tommy/Desktop/django/compare/lib/python3.6/site-packages/django/db/models/sql/query.py" in names_to_path
1327. "Choices are: %s" % (name, ", ".join(available)))
Exception Type: FieldError at /search/
Exception Value: Cannot resolve keyword 'search_index' into field. Choices are: buy_link, category, category_id, company, company_id, condition, date_added, id, manufacturer, manufacturer_id, orginial_price, price, product_description, product_image_url, product_keywords, product_name, promotional_text, sale_price, shipping_cost, sku, slug, stock, updated, views, warranty
答案 0 :(得分：0)
我认为这可能就像您忘记在'django.contrib.postgres'的{{1}}列表中添加INSTALLED_APPS一样简单。
请在此处查看有关该特定功能的文档：https://docs.djangoproject.com/en/1.11/ref/contrib/postgres/search/#the-search-lookup