Merge pull request #559 from iurisilvio/inaccessible_callback

Extension point to customize the behaviour of inaccessible views.

flask_admin/base.py

@@ -292,8 +292,8 @@ class BaseView(with_metaclass(AdminViewMeta, BaseViewClass)):
         """
             This method will be executed before calling any view method.
 
-            By default, it will check if the admin class is accessible and if it is not it will
-            throw HTTP 404 error.
+            It will execute the ``inaccessible_callback`` if the view is not
+            accessible.
 
             :param name:
                 View function name
@@ -301,7 +301,17 @@ class BaseView(with_metaclass(AdminViewMeta, BaseViewClass)):
                 View function arguments
         """
         if not self.is_accessible():
-            return abort(403)
+            return self.inaccessible_callback(name, **kwargs)
+
+    def inaccessible_callback(self, name, **kwargs):
+        """
+            Handle the response to inaccessible views.
+
+            By default, it throw HTTP 403 error. Override this method to
+            customize the behaviour.
+        """
+        return abort(403)
+
 
     @property
     def _debug(self):

flask_admin/tests/test_base.py

 from nose.tools import ok_, eq_, raises
 
-from flask import Flask, request
+from flask import Flask, request, abort
 from flask.views import MethodView
 from flask.ext.admin import base
 
@@ -232,6 +232,20 @@ def test_permissions():
     eq_(rv.status_code, 403)
 
 
+def test_inaccessible_callback():
+    app = Flask(__name__)
+    admin = base.Admin(app)
+    view = MockView()
+    admin.add_view(view)
+    client = app.test_client()
+
+    view.allow_access = False
+    view.inaccessible_callback = lambda *args, **kwargs: abort(418)
+
+    rv = client.get('/admin/mockview/')
+    eq_(rv.status_code, 418)
+
+
 def get_visibility():
     app = Flask(__name__)
     admin = base.Admin(app)