I know such questions exist gallore in SO. But none satisfies my problem. My code however works in localhost in my PC but not in online server. The site is here. You can go to the English tab and click a news headline to see the ajax request. It is a simple ajax request from the template to the view.py file through a URL defined in the urls.py file. The url (i.e. show_recommendation) is defined in the following way :
from django.contrib import admin
#from django.urls import path
from django.conf.urls import url
from khobor import views
urlpatterns = [
url(r'^$', views.home, name='home'),
url(r'^admin/', admin.site.urls),
url(r'^find_feed/', views.find_feed, name="find_feed"),
url(r'^show_articles/', views.show_articles, name="show_articles"),
url(r'^clear_cookie/', views.clear_cookie, name="clear_cookie"),
url(r'^show_recommendation', views.show_recommendation, name="show_recommendation"),
]
JavaScript code in template is as follows:
$.ajax({
url:"/show_recommendation/",
method:"POST",
dataType: 'JSON',
data:{
id_found:id_found,
csrfmiddlewaretoken: '{{ csrf_token }}'
},
success:function (data) {
//data=$.parseJSON(data);
alert(data);
if(window.console){
console.log(" response data = ");
console.log(data);
}
if($.isArray(data)){
for(i=0; i<data.length; i++){
var id_found=data[i][0];
if(window.console){
console.log(" id found = "+id_found+" id found result = "+jQuery.inArray(id_found, ids_all));
}
if(jQuery.inArray(id_found, ids_all) ==-1){
ids_all.push(id_found);
new_ids.push(id_found);
if(window.console){
console.log(" id pushed = "+id_found);
}
//$("#recommendations").append('<li>'+data[i][0]+' ... '+data[i][1]+'</li>');
$("#recommendations").append('<li class="article_indiv inline_block">' +
'<span class="top_image inline_block" data-id="'+data[i][0]+'" ><img src="'+data[i][4]+'" alt="image"/>'+
'</span>' +
'<a class="link" data-id="'+data[i][0]+'" target="_blank" href="'+data[i][2]+'" >'+data[i][3]+'</a>' +
'</li>');
$(".top_image").imagefill();
/* $(".top_image").each(function(){
$elem = $(this);
var data_id =$elem.attr('data-id');
if(jQuery.inArray(data_id, new_ids) !=-1){
$elem.imagefill();
}
});*/
}
} // end of for loop
Cookies.set('ids_all', ids_all);
}
}
});
In view.py I have :
def show_recommendation(request):
# recommendations=['item1','item2']
# json_list=json.dumps(recommendations)
if request.method=="POST" and request.is_ajax():
#print("u see this response ? ");
#return HttpResponse("this is the response ")
id_found = request.POST['id_found'];
news_found=news.objects.get(id=id_found)
content_found=news_found.content
all_news = news.objects.exclude(id=id_found).order_by('-id').all()
myList=[]
for news_indiv in all_news:
content=news_indiv.content
id=news_indiv.id
headline=news_indiv.headline
url=news_indiv.url
image=news_indiv.image
result_similarity=cosine_sim(content,content_found)
myList.append([id, result_similarity,url,headline,image])
# myList = [3, 2, 5, 6, 1, 0, -5, 6, -7]
# myList = [[12, .45633], [13, .245633], [14, .3323], [15, .8756]]
result = quickSort(myList)
total_rows = len(result)
resultList=[]
resultList.append(result[total_rows-1])
resultList.append(result[total_rows-2])
resultList.append(result[total_rows-3])
#print("resultList === ")
#print(resultList)
json_list = json.dumps(resultList)
#if(json_list is None):
# json_list="0";
print ("before HttpResponse ")
return HttpResponse(json_list)
#return HttpResponse("dfdfdfdf")
#return json_list
In my online server, I get the following error though it works pretty fine in my localhost on my PC :
Internal Server Error: /show_recommendation/
Traceback (most recent call last):
File "/usr/lib64/python3.6/site-packages/django/core/handlers
/exception.py", line 35, in inner
response = get_response(request)
File "/usr/lib64/python3.6/site-packages/django/core/handlers/base.py",
line 139, in _get_response
"returned None instead." % (callback.__module__, view_name)
ValueError: The view khobor.views.show_recommendation didn't return an
HttpResponse object. It returned None instead.
[03/Jun/2018 21:00:44] "POST /show_recommendation/ HTTP/1.1" 500 54424
How to remove the error now ?
