from django import template                                                                                                  
                                                                                                                             
register = template.Library()                                                                                                
                                                                                                                             
@register.filter                                                                                                             
def check_login(request):                                                                                                    
    if request.user.is_authenticated():                                                                                      
        return True                                                                                                          
    else:                                                                                                                    
        return False