fixed some issues with non-used tags

application/templates/student_page.html

     </ul>
 </div>
 <div>
-</div>
-<form id="searchform" action="{% url 'blog_search_list_view' %}" method="get" accept-charset="utf-8">
-    <button class="searchbutton" type="submit">
-        <i class="fa fa-search"></i>
-    </button>
-    <input class="searchfield" id="searchbox" name="q" type="text" placeholder="Search">
-</form>
-<div class="table-responsive">
-    <table class="table table-striped table-bordered table-hover">
-    </table>
-</div>
-
+{% if messages %}
+{% for message in messages %}
+<div {% if message.tags %} class="{{ message.tags }}" {% endif %}>{{ message }}</div>
+{% endfor %}
+{% endif %}
 <form class="post-form" method="post">
     {% csrf_token %} {{form.as_p}}
     <button type="submit" class="save btn btn-outline-dark">Save</button>

application/templates/tag_list.html

 {% extends "base.html" %} {% block content %}
+ {% load taggit_templatetags2_tags %} 
 
 <div>
 </div>

application/templates/tag_remove.html

+{% extends 'base.html' %} {% block content %} 
+{% if tag %} Posts tagged with "{{ tag.name }}" {% endif %} 
+{% for post in posts %}
+<div class="post">
+    <div class="date">
+        {{ post.published_date }}
+    </div>
+    <h1>
+        <a href="{% url 'post_detail' pk=post.pk %}">{{ post.title }}</a>
+    </h1>
+    <p>{{ post.text|linebreaks }}</p>
+    Tags: {% for tag in post.tags.all %}
+    <a href="{% url 'student_page_remove' tag.slug %}">{{ tag.name }}</a>
+    {% if not forloop.last %}, {% endif %} {% endfor %} <p>
+        {{ post.author }}
+    </p>
+</div>
+{% endfor %} 
+</div>
+{% endblock %}

application/views.py

 import collections
 from taggit_templatetags2.views import TagCanvasListView
 from django.contrib.auth.models import User
+from django.contrib import messages
+
 
 
 import logging
             obj.user = request.user
             obj.save()
             m_tags = form.cleaned_data['m_tags']
-            obj.tags.add(*m_tags)
-            form.save_m2m()
-        return redirect('/student/')
-
+            tags = Tag.objects.all()
+            if m_tags in tags:
+                obj.tags.add(*m_tags)
+                form.save_m2m()
+                return redirect('/student/')
+            else:
+                messages.info(request, 'Sorry !! Den Tag den du suchst gibt es leider nicht!')
     else:
         form = NewTagForm()
     return render(request, 'student_page.html', {'form':form})
     if u:
         tags_user = Tag.objects.filter(customuser__user = u)
         log.info(tags_user)
-    arr = []
     for tag in tags_user:
-        arr.append(str(tag))
-        log.info(tag)
         posts = Post.objects.filter(tags__in=[tag]).order_by('-published_date')
+        log.info(posts)
     return render(request, 'tag_list.html', locals())
 
 class TagSearch(TagCanvasListView):

log.txt

 [22/Oct/2018 18:55:43] INFO [mysite:152] <QuerySet [<Tag: bamberg>, <Tag: test>]>
 [22/Oct/2018 18:55:43] INFO [mysite:156] bamberg
 [22/Oct/2018 18:55:43] INFO [mysite:156] test
+[24/Oct/2018 15:10:56] INFO [mysite:152] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:10:56] INFO [mysite:156] stefan
+[24/Oct/2018 15:11:37] INFO [mysite:152] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:11:37] INFO [mysite:156] stefan
+[24/Oct/2018 15:11:37] INFO [mysite:158] <QuerySet []>
+[24/Oct/2018 15:13:48] INFO [mysite:152] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:13:48] INFO [mysite:156] stefan
+[24/Oct/2018 15:13:48] INFO [mysite:158] <QuerySet []>
+[24/Oct/2018 15:15:46] INFO [mysite:153] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:15:46] INFO [mysite:157] stefan
+[24/Oct/2018 15:15:55] INFO [mysite:153] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:15:55] INFO [mysite:157] stefan
+[24/Oct/2018 15:15:55] INFO [mysite:159] <QuerySet []>
+[24/Oct/2018 15:17:17] INFO [mysite:152] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:17:17] INFO [mysite:156] stefan
+[24/Oct/2018 15:17:17] INFO [mysite:158] <QuerySet []>
+[24/Oct/2018 15:18:27] INFO [mysite:152] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:18:27] INFO [mysite:156] stefan
+[24/Oct/2018 15:18:27] INFO [mysite:158] <QuerySet []>
+[24/Oct/2018 15:21:10] INFO [mysite:150] <QuerySet [<Post: second bla>, <Post: first post>, <Post: Third one>]>
+[24/Oct/2018 15:21:10] INFO [mysite:154] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:21:10] INFO [mysite:158] stefan
+[24/Oct/2018 15:21:10] INFO [mysite:160] <QuerySet []>
+[24/Oct/2018 15:22:12] INFO [mysite:152] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:22:12] INFO [mysite:156] ['stefan']
+[24/Oct/2018 15:22:12] INFO [mysite:158] <QuerySet []>
+[24/Oct/2018 15:22:29] INFO [mysite:152] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:22:29] INFO [mysite:156] ['stefan']
+[24/Oct/2018 15:22:57] INFO [mysite:152] <QuerySet [<Tag: stefan>]>
+[24/Oct/2018 15:22:57] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:23:36] INFO [mysite:152] <QuerySet [<Tag: stefan>, <Tag: test>]>
+[24/Oct/2018 15:23:36] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:23:36] INFO [mysite:155] <QuerySet [<Post: Third one>, <Post: first post>, <Post: second bla>]>
+[24/Oct/2018 15:24:29] INFO [mysite:152] <QuerySet [<Tag: bamberg>, <Tag: test>, <Tag: wieder>]>
+[24/Oct/2018 15:24:29] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:24:29] INFO [mysite:155] <QuerySet [<Post: Third one>, <Post: first post>, <Post: second bla>]>
+[24/Oct/2018 15:24:29] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:26:03] INFO [mysite:152] <QuerySet [<Tag: lukas>, <Tag: hi>]>
+[24/Oct/2018 15:26:03] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:26:03] INFO [mysite:155] <QuerySet [<Post: Third one>, <Post: second bla>]>
+[24/Oct/2018 15:51:54] INFO [mysite:152] <QuerySet [<Tag: bamberg>, <Tag: test>, <Tag: wieder>]>
+[24/Oct/2018 15:51:55] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:51:55] INFO [mysite:155] <QuerySet [<Post: Third one>, <Post: first post>, <Post: second bla>]>
+[24/Oct/2018 15:51:55] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:53:01] INFO [mysite:152] <QuerySet [<Tag: bamberg>, <Tag: test>]>
+[24/Oct/2018 15:53:01] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:53:01] INFO [mysite:155] <QuerySet [<Post: Third one>, <Post: first post>, <Post: second bla>]>
+[24/Oct/2018 15:53:28] INFO [mysite:152] <QuerySet [<Tag: bamberg>, <Tag: test>, <Tag: this is a new one>]>
+[24/Oct/2018 15:53:28] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 15:53:28] INFO [mysite:155] <QuerySet [<Post: Third one>, <Post: first post>, <Post: second bla>]>
+[24/Oct/2018 15:53:28] INFO [mysite:155] <QuerySet []>
+[24/Oct/2018 18:41:24] INFO [mysite:186] None
+[24/Oct/2018 18:41:31] INFO [mysite:186] bla
+[24/Oct/2018 18:42:12] INFO [mysite:186] avoiddouble
+[24/Oct/2018 18:42:20] INFO [mysite:186] hi
+[24/Oct/2018 18:56:30] INFO [mysite:158] <QuerySet [<Tag: bamberg>, <Tag: test>]>
+[24/Oct/2018 18:56:30] INFO [mysite:161] <QuerySet []>
+[24/Oct/2018 18:56:30] INFO [mysite:161] <QuerySet [<Post: Third one>, <Post: first post>, <Post: second bla>]>
+[24/Oct/2018 18:56:45] INFO [mysite:190] None
+[24/Oct/2018 18:56:49] INFO [mysite:190] bamberg
+[24/Oct/2018 18:57:29] INFO [mysite:189] bamberg
+[24/Oct/2018 19:00:30] INFO [mysite:189] None
+[24/Oct/2018 19:00:30] INFO [mysite:191] <QuerySet []>
+[24/Oct/2018 19:00:33] INFO [mysite:189] hi
+[24/Oct/2018 19:00:33] INFO [mysite:191] <QuerySet [<Post: second bla>, <Post: Third one>]>
+[24/Oct/2018 19:00:38] INFO [mysite:189] bamberg
+[24/Oct/2018 19:00:38] INFO [mysite:191] <QuerySet []>
+[24/Oct/2018 19:00:54] INFO [mysite:189] bamberg
+[24/Oct/2018 19:00:54] INFO [mysite:191] <QuerySet []>
+[24/Oct/2018 19:01:16] INFO [mysite:189] test
+[24/Oct/2018 19:01:16] INFO [mysite:191] <QuerySet [<Post: second bla>, <Post: first post>, <Post: Third one>]>
+[24/Oct/2018 19:01:20] INFO [mysite:189] third
+[24/Oct/2018 19:01:20] INFO [mysite:191] <QuerySet [<Post: Third one>]>
+[24/Oct/2018 19:01:35] INFO [mysite:189] None
+[24/Oct/2018 19:01:35] INFO [mysite:191] <QuerySet []>
+[24/Oct/2018 19:01:40] INFO [mysite:189] bamberg
+[24/Oct/2018 19:01:40] INFO [mysite:191] <QuerySet []>
+[24/Oct/2018 19:03:03] INFO [mysite:189] None
+[24/Oct/2018 19:03:03] INFO [mysite:191] <QuerySet []>
+[24/Oct/2018 19:03:08] INFO [mysite:189] bamberg
+[24/Oct/2018 19:03:08] INFO [mysite:191] <QuerySet []>
+[24/Oct/2018 19:03:28] INFO [mysite:189] bamberg
+[24/Oct/2018 19:03:28] INFO [mysite:191] <QuerySet [<Post: Third one>]>
+[24/Oct/2018 19:03:45] INFO [mysite:189] bamberg
+[24/Oct/2018 19:03:45] INFO [mysite:191] <QuerySet [<Post: Third one>, <Post: here i go again>]>