diff --git a/courses/views.py b/courses/views.py
index 7df623e..35143b7 100644
--- a/courses/views.py
+++ b/courses/views.py
@@ -636,8 +636,6 @@ class TopicsView(LoginRequiredMixin, LogMixin, generic.ListView):
         context['users'] = users
         exercises = Exercise.objects.filter(Q(students=self.request.user)|Q(professors=self.request.user))
         context['exercises'] = exercises
-        files = File.objects.all()
-        context['files'] = files
 
         context['topic'] = topic
         context['subject'] = topic.subject
diff --git a/exercise/models.py b/exercise/models.py
index 9ecd5ae..f91fcfc 100644
--- a/exercise/models.py
+++ b/exercise/models.py
@@ -20,16 +20,17 @@ It represents the Exercises inside topic.
 
 
 class Exercise(models.Model):
+
     name_exercise = models.CharField(_('Name'), max_length=100)
     description = models.TextField(_('Description'), blank=True)
     init_date = models.DateField(_('Begin of Subject Date'))
     end_date = models.DateField(_('End of Subject Date'))
     grade = models.DecimalField(max_digits=20, decimal_places=2, default=Decimal('0.00'), null=True)
-    topic = models.ForeignKey(Topic, verbose_name=_('Topic'), related_name='exercises')
+    topic = models.ForeignKey(Topic, verbose_name=_('Topic'), related_name='exercise_topic')
     professors = models.ManyToManyField(User, verbose_name=_('Professors'), related_name='professors_exercise', blank=True)
     students = models.ManyToManyField(User, verbose_name=_('Students'), related_name='subject_exercise', blank = True)
-    file = models.FileField(upload_to=file_path)
-    file_type = models.ForeignKey(MimeType, verbose_name=_('Type file'), related_name='exercise_type')
+    file = models.FileField(upload_to='uploads/%Y/%m/%d')
+    file_type = models.ForeignKey(MimeType, verbose_name=_('Type file'), related_name='exercise_type',null=True)
 
     def __str__(self):
         return self.name_exercise
\ No newline at end of file
diff --git a/exercise/templates/exercise/card_list_user.html b/exercise/templates/exercise/card_list_user.html
index 995b5c1..53b4ce7 100644
--- a/exercise/templates/exercise/card_list_user.html
+++ b/exercise/templates/exercise/card_list_user.html
@@ -36,10 +36,9 @@
               <div class="resource_inline">
                 <h4>{% trans 'Delivery' %}</h4>
               </div>
-                {% for file in files %}
-                  <li>{{file.exercise}}: <a href="{{file.file.url}}" target="_blank">{{file.name_file}}</a></li>
-                {% endfor %}
-                
+              {% for exercise in exercises %}
+                <li><a href="{{exercise.file.url}}" target="_blank">{{exercise.name_exercise}}</a></li>     
+              {% endfor %}               
             </div>
             <div class="col-md-4"> 
               <div class="resource_inline">
diff --git a/exercise/templates/exercise/card_topic_exercises.html b/exercise/templates/exercise/card_topic_exercises.html
index f5e06af..cc08296 100644
--- a/exercise/templates/exercise/card_topic_exercises.html
+++ b/exercise/templates/exercise/card_topic_exercises.html
@@ -39,9 +39,7 @@
             {% if exercise.file %}
               <div class="form-group">
                 <label for="DelExc" class="col-md-4 control-label"> <i class="fa fa-file-archive-o fa-3x" aria-hidden="true">
-                {% for file in exercise.file %}
-                    <a href="{{exercise.file.url}}">{% trans 'File' %}</a>
-                {% endfor %}
+                <a href="{{exercise.file.url}}" target="_blank">{% trans 'File' %}</a>
                 </i> 
               </div>
             {% else %}
diff --git a/exercise/views.py b/exercise/views.py
index 542d375..c765fe1 100644
--- a/exercise/views.py
+++ b/exercise/views.py
@@ -47,13 +47,9 @@ class CreateExercise(LoginRequiredMixin, HasRoleMixin, LogMixin, NotificationMix
         self.object = form.save(commit = False)
         topic = get_object_or_404(Topic, slug = self.kwargs.get('slug'))
         self.object.topic = topic
-        self.object.name = str(self.object)
-        self.object.exercise = self.object
-        self.object.professors = topic.subject.professors
-        self.object.students = topic.subject.students
 
         # Set MimeType
-        exercise = self.request.FILES['exercise_url']
+        exercise = self.request.FILES['file']
         try:
             if exercise:
                 exercise_type = exercise.content_type
@@ -73,6 +69,9 @@ class CreateExercise(LoginRequiredMixin, HasRoleMixin, LogMixin, NotificationMix
             print('Exercise not uploaded')
 
         self.object.save()
+        self.object.professors = topic.subject.professors.all()
+        self.object.students = topic.subject.students.all()
+        self.object.save()
         #CREATE LOG 
         self.log_context['topic_id'] = topic.id
         self.log_context['topic_name'] = topic.name
@@ -86,12 +85,12 @@ class CreateExercise(LoginRequiredMixin, HasRoleMixin, LogMixin, NotificationMix
 
 
         #CREATE NOTIFICATION
-        super(CreateExercise, self).createNotification(message="uploaded a Exercise "+ self.object.name, actor=self.request.user,
-            resource_name=self.object.name, resource_link= reverse('course:view_topic', args=[self.object.topic.slug]), 
+        super(CreateExercise, self).createNotification(message="uploaded a Exercise "+ self.object.name_exercise, actor=self.request.user,
+            resource_name=self.object.name_exercise, resource_link= reverse('course:view_topic', args=[self.object.topic.slug]), 
             users=self.object.topic.subject.students.all())
 
         self.log_context['exercise_id'] = self.object.id
-        self.log_context['exercise_name'] = self.object.name
+        self.log_context['exercise_name'] = self.object.name_exercise
         self.log_context['topic_id'] = self.object.topic.id
         self.log_context['topic_name'] = self.object.topic.name
         self.log_context['topic_slug'] = self.object.topic.slug
@@ -138,7 +137,7 @@ def render_exercise(request, id):
 
     log_context = {}
     log_context['exercise_id'] = exercise.id
-    log_context['exercise_name'] = exercise.name
+    log_context['exercise_name'] = exercise.name_exercise
     log_context['topic_id'] = exercise.topic.id
     log_context['topic_name'] = exercise.topic.name
     log_context['topic_slug'] = exercise.topic.slug
--
libgit2 0.21.2