Implemented support for specifying different endpoint name than the...

Implemented support for specifying different endpoint name than the concatenation of module name and view name.

lib/vial/view/__init__.py

@@ -118,6 +118,21 @@ class BaseView(flask.views.View):
         """
         raise NotImplementedError()
 
+    @classmethod
+    def get_view_endpoint_name(cls):
+        """
+        Return unique name for the view endpoint. Name must be unique in the namespace of
+        parent blueprint/module and should contain only characters ``[a-z0-9]``.
+        It will be used for generating endpoint name for the view.
+
+        *This method does not have any default implementation and must be overridden
+        by a subclass.*
+
+        :return: Name for the view.
+        :rtype: str
+        """
+        return cls.get_view_name()
+
     @classmethod
     def get_view_endpoint(cls):
         """
@@ -129,7 +144,10 @@ class BaseView(flask.views.View):
         :return: Routing endpoint for the view within the whole application.
         :rtype: str
         """
-        return '{}.{}'.format(cls.module_name, cls.get_view_name())
+        return '{}.{}'.format(
+            cls.module_name,
+            cls.get_view_endpoint_name()
+        )
 
     @classmethod
     def get_view_url(cls, **kwargs):
@@ -456,7 +474,7 @@ class RenderableView(BaseView):  # pylint: disable=locally-disabled,abstract-met
         if cls.module_name:
             return '{}/{}.html'.format(
                 cls.module_name,
-                cls.get_view_name()
+                cls.get_view_endpoint_name()
             )
         raise RuntimeError("Unable to guess default view template, because module name was not yet set.")
 
@@ -804,10 +822,10 @@ class BaseSearchView(RenderableView, VialUtils):
         )
         breadcrumbs_menu.add_entry(
             'endpoint',
-            cls.get_view_name(),
+            cls.get_view_endpoint_name(),
             endpoint = '{}.{}'.format(
                 cls.module_name,
-                cls.get_view_name()
+                cls.get_view_endpoint_name()
             )
         )
         return breadcrumbs_menu
@@ -1084,7 +1102,6 @@ class ItemListView(RenderableView):  # pylint: disable=locally-disabled,abstract
     Base class for item *list* views. These views provide quick and simple access
     to lists of all objects.
     """
-
     @classmethod
     def get_view_name(cls):
         """*Implementation* of :py:func:`vial.view.BaseView.get_view_name`."""
@@ -1104,7 +1121,10 @@ class ItemListView(RenderableView):  # pylint: disable=locally-disabled,abstract
         action_menu.add_entry(
             'endpoint',
             'list',
-            endpoint = '{}.list'.format(cls.module_name)
+            endpoint = '{}.{}'.format(
+                cls.module_name,
+                cls.get_view_endpoint_name()
+            )
         )
         return action_menu
 
@@ -1171,6 +1191,12 @@ class ItemShowView(RenderableView):  # pylint: disable=locally-disabled,abstract
     @classmethod
     def get_view_url(cls, **kwargs):
         """*Implementation* of :py:func:`vial.view.BaseView.get_view_url`."""
+        if 'item' not in kwargs or not kwargs['item']:
+            raise ValueError(
+                "Missing item parameter for show URL view '{}'". format(
+                    cls.get_view_endpoint()
+                )
+            )
         return flask.url_for(
             cls.get_view_endpoint(),
             item_id = kwargs['item'].get_id()
@@ -1209,13 +1235,19 @@ class ItemShowView(RenderableView):  # pylint: disable=locally-disabled,abstract
         action_menu.add_entry(
             'endpoint',
             'list',
-            endpoint = '{}.list'.format(cls.module_name),
+            endpoint = '{}.{}'.format(
+                cls.module_name,
+                cls.get_view_endpoint_name().replace('show', 'list')
+            ),
             paramlist = []
         )
         action_menu.add_entry(
             'endpoint',
             'show',
-            endpoint = '{}.show'.format(cls.module_name)
+            endpoint = '{}.{}'.format(
+                cls.module_name,
+                cls.get_view_endpoint_name()
+            )
         )
         return action_menu
 
@@ -1486,12 +1518,18 @@ class ItemCreateView(ItemActionView):  # pylint: disable=locally-disabled,abstra
         breadcrumbs_menu.add_entry(
             'endpoint',
             'list',
-            endpoint = '{}.list'.format(cls.module_name)
+            endpoint = '{}.{}'.format(
+                cls.module_name,
+                cls.get_view_endpoint_name().replace('create', 'list')
+            ),
         )
         breadcrumbs_menu.add_entry(
             'endpoint',
             'create',
-            endpoint = '{}.create'.format(cls.module_name)
+            endpoint = '{}.{}'.format(
+                cls.module_name,
+                cls.get_view_endpoint_name()
+            )
         )
         return breadcrumbs_menu
 
@@ -1977,17 +2015,26 @@ class ItemUpdateView(ItemActionView):  # pylint: disable=locally-disabled,abstra
         breadcrumbs_menu.add_entry(
             'endpoint',
             'list',
-            endpoint = '{}.list'.format(cls.module_name)
+            endpoint = '{}.{}'.format(
+                cls.module_name,
+                cls.get_view_endpoint_name().replace('update', 'list')
+            )
         )
         breadcrumbs_menu.add_entry(
             'endpoint',
             'show',
-            endpoint = '{}.show'.format(cls.module_name)
+            endpoint = '{}.{}'.format(
+                cls.module_name,
+                cls.get_view_endpoint_name().replace('update', 'show')
+            )
         )
         breadcrumbs_menu.add_entry(
             'endpoint',
             'update',
-            endpoint = '{}.update'.format(cls.module_name)
+            endpoint = '{}.{}'.format(
+                cls.module_name,
+                cls.get_view_endpoint_name()
+            )
         )
         return breadcrumbs_menu
 
@@ -2363,7 +2410,7 @@ class ItemObjectRelationView(ItemChangeView):  # pylint: disable=locally-disable
         :rtype: str
         """
         if cls.module_name:
-            return '{}/{}.html'.format(cls.module_name, cls.get_view_name())
+            return '{}/{}.html'.format(cls.module_name, cls.get_view_endpoint_name())
         raise RuntimeError("Unable to guess default view template, because module name was not yet set.")
 
     @classmethod