make cancel go one page back

devices/templates/devices/device_in_net_confirm_delete.html

@@ -5,7 +5,7 @@
 <form method="post">{% csrf_token %}
     <p>Are you sure you want to delete the IP "{{ object.ip }}" for "{{ object.device }}"?</p>
     <button type="submit" class="btn btn-danger">Delete</button>
-    <a href="{{ view.get_success_url }}" class="btn btn-primary">Cancel</a>
+    <a href="{{ request.META.HTTP_REFERER }}" class="btn btn-primary">Cancel</a>
 <input type="hidden" id="previous_page" name="previous_page" value="/previous/page/url">
 </form>
 <script>

devices/templates/devices/device_in_net_create.html

@@ -8,7 +8,7 @@
     {% csrf_token %}
     {{ form|crispy }}
     <button type="submit" class="btn btn-primary">Save</button>
-    <a href="{{ view.get_success_url }}" class="btn btn-secondary">Cancel</a>
+    <a href="{{ request.META.HTTP_REFERER }}" class="btn btn-primary">Cancel</a>
     <input type="hidden" id="previous_page" name="previous_page" value="/previous/page/url">
 </form>
 <script>

devices/templates/devices/device_in_net_update.html

@@ -16,7 +16,7 @@
 </div>
 <br>
 <input type="submit" value="Save" class="btn btn-primary">
-<a href="{{ view.get_success_url }}" class="btn btn-secondary">Cancel</a>
+<a href="{{ request.META.HTTP_REFERER }}" class="btn btn-primary">Cancel</a>
 <input type="hidden" id="previous_page" name="previous_page" value="/previous/page/url">
 </form>
 <script>

devices/templates/devices/device_update.html

@@ -16,6 +16,7 @@
 </div>
 <br>
 <input type="submit" value="Save" class="btn btn-primary">
+<a href="{{ request.META.HTTP_REFERER }}" class="btn btn-primary">Cancel</a>
 <input type="hidden" id="previous_page" name="previous_page" value="/previous/page/url">
 </form>
 <script>

devices/templates/devices/warranty_confirm_delete.html

@@ -5,7 +5,7 @@
 <form method="post">{% csrf_token %}
     <p>Are you sure you want to delete the warranty for "{{ object }}"?</p>
     <button type="submit" class="btn btn-danger">Delete</button>
-    <a href="{{ view.get_success_url }}" class="btn btn-primary">Cancel</a>
+    <a href="{{ request.META.HTTP_REFERER }}" class="btn btn-primary">Cancel</a>
     <input type="hidden" id="previous_page" name="previous_page" value="/previous/page/url">
 </form>
 <script>

devices/templates/devices/warranty_create.html

@@ -8,7 +8,7 @@
     {% csrf_token %}
     {{ form|crispy }}
     <button type="submit" class="btn btn-primary">Save</button>
-    <a href="{{ view.get_success_url }}" class="btn btn-secondary">Cancel</a>
+    <a href="{{ request.META.HTTP_REFERER }}" class="btn btn-primary">Cancel</a>
     <input type="hidden" id="previous_page" name="previous_page" value="/previous/page/url">
 </form>
 <script>

devices/templates/devices/warranty_update.html

@@ -16,7 +16,7 @@
 </div>
 <br>
 <input type="submit" value="Save" class="btn btn-primary">
-<a href="{{ view.get_success_url }}" class="btn btn-secondary">Cancel</a>
+<a href="{{ request.META.HTTP_REFERER }}" class="btn btn-primary">Cancel</a>
 <input type="hidden" id="previous_page" name="previous_page" value="/previous/page/url">
 </form>
 <script>