Refs: #3478@3h; Policy Cleanup and Providing Policy and permissions for all models and actions

 - ApplicationPolicy nondestructive permission depend on model existance
 - ApplicationPolicy destructive permission default to `false`
 - Tied Policy permissions at ApplicationPolicy Level: edit? → update?, new? → create?, index? → show?
 - ApplicationPolicy convenience methods `delete?` & `authorizes_action?(action)`
 - Refactoring of `spec/helpers/table_builder_helper_spec.rb` accordingly

 - Stubbing scope in specs (cannot switch to referential with a `build_stubbed` instance)

1 files changed, 18 insertions, 18 deletions

diff --git a/app/policies/application_policy.rb b/app/policies/application_policy.rb
index e8d7f5f30..b23d9e0cf 100644
--- a/app/policies/application_policy.rb
+++ b/app/policies/application_policy.rb
@@ -6,13 +6,25 @@ class ApplicationPolicy
     destroy?
   end
 
-  # Tie edit and update together, #edit?, do not override #edit?,
+  def authorizes_action?(action)
+    public_send("#{action}?")
+  rescue NoMethodError
+    false
+  end
+
+  # Tie edit? and update? together, #edit?, do not override #edit?,
   # unless you want to break this tie on purpose
   def edit?
     update?
   end
 
-  # Tie new and create together, do not override #new?,
+  # Tie index? and show? together, do not override #new?,
+  # unless you want to break this tie on purpose
+  def index?
+    show?
+  end
+
+  # Tie new? and create? together, do not override #new?,
   # unless you want to break this tie on purpose
   def new?
     create?
@@ -39,31 +51,19 @@ class ApplicationPolicy
     record.referential if record.respond_to?(:referential)
   end
 
-  def index?
-    show?
-  end
-
-  def show?
-    scope.where(:id => record.id).exists?
-  end
-
   def create?
     false
   end
 
-  def new?
-    create?
-  end
-
-  def update?
+  def destroy?
     false
   end
 
-  def edit?
-    update?
+  def show?
+    scope.where(:id => record.id).exists?
   end
 
-  def destroy?
+  def update?
     false
   end