Backport trash can navigation link resolution fix, GitLab issue #331. Thanks to @DocCyblade for the report.

HISTORY.rst

@@ -3,7 +3,7 @@
 - Backport resize transformation math operation fix (GitLab #319).
 - Update Pillow to 3.1.2 (Security fix).
 - Backport zoom transformation performance improvement (GitLab #334).
-
+- Backport trash can navigation link resolution fix (GitLab #331).
 
 2.1.4 (2016-10-28)
 ==================

docs/releases/2.1.5.rst

@@ -19,6 +19,7 @@ Other changes
     - https://pillow.readthedocs.io/en/3.4.x/releasenotes/3.1.2.html
 
 - Backport zoom performance improvement (GitLab #334).
+- Backport trash can navigation link resolution fix (GitLab #331).
 
 
 Removals
@@ -75,6 +76,7 @@ Bugs fixed or issues closed
 ===========================
 
 * `GitLab issue #319 <https://gitlab.com/mayan-edms/mayan-edms/issues/319>`_ TransformationResize issue with very "long" image
+* `GitLab issue #331 <https://gitlab.com/mayan-edms/mayan-edms/issues/331>`_ Trash List View: Items actions should be limited
 * `GitLab issue #334 <https://gitlab.com/mayan-edms/mayan-edms/issues/334>`_ Perfomance improvment: prevent unnecessary image.resize in TransformationZoom
 
 .. _PyPI: https://pypi.python.org/pypi/mayan-edms/

mayan/apps/navigation/classes.py

@@ -126,19 +126,19 @@ class Menu(object):
 
             for bound_source, links in self.bound_links.iteritems():
                 try:
-                    if inspect.isclass(bound_source) and type(resolved_navigation_object) == bound_source:
-                        for link in links:
-                            resolved_link = link.resolve(
-                                context=context,
-                                resolved_object=resolved_navigation_object
-                            )
-                            if resolved_link:
-                                resolved_links.append(resolved_link)
-                        # No need for further content object match testing
-                        break
-                    else:
+                    if inspect.isclass(bound_source):
+                        if type(resolved_navigation_object) == bound_source:
+                            for link in links:
+                                resolved_link = link.resolve(
+                                    context=context,
+                                    resolved_object=resolved_navigation_object
+                                )
+                                if resolved_link:
+                                    resolved_links.append(resolved_link)
+                            # No need for further content object match testing
+                            break
+                        elif hasattr(resolved_navigation_object, 'get_deferred_fields') and resolved_navigation_object.get_deferred_fields() and isinstance(resolved_navigation_object, bound_source):
                         # Second try for objects using .defer() or .only()
-                        if inspect.isclass(bound_source) and isinstance(resolved_navigation_object, bound_source):
                             for link in links:
                                 resolved_link = link.resolve(
                                     context=context,