我想將文本搜索添加到我的Web應用程序。我爲postgres中的三個字段創建了一個索引。我無法弄清楚如何從django視圖查詢索引。如何通過Django查詢Postgres索引

索引名爲'search_index'，當我嘗試查詢search_index時，我得到一個字段錯誤。

意見

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

來源

2017-04-17 Tom Myers