Fix JunOS model

Block must return string, it returned nil which broke it.

Also coerce type to string in future, so block won't fail so
catastrophically, just output missing.

2 files changed, 5 insertions, 3 deletions

diff --git a/lib/oxidized/model/junos.rb b/lib/oxidized/model/junos.rb
index 4bca998..5b3d11b 100644
--- a/lib/oxidized/model/junos.rb
+++ b/lib/oxidized/model/junos.rb
@@ -20,10 +20,12 @@ class JunOS < Oxidized::Model
   end
 
   post do
+    out = ''
     case @model
     when 'mx960'
-      cmd('show chassis fabric reachability')  { |cfg| comment cfg }
+      out << cmd('show chassis fabric reachability')  { |cfg| comment cfg }
     end
+    out
   end
 
   cmd 'show chassis hardware' do |cfg|
diff --git a/lib/oxidized/model/model.rb b/lib/oxidized/model/model.rb
index 70b307f..ccc03b4 100644
--- a/lib/oxidized/model/model.rb
+++ b/lib/oxidized/model/model.rb
@@ -125,10 +125,10 @@ module Oxidized
         data << out.to_s
       end
       procs[:pre].each do |pre_proc|
-        pre << instance_eval(&pre_proc)
+        pre << instance_eval(&pre_proc).to_s
       end
       procs[:post].each do |post_proc|
-        data << instance_eval(&post_proc)
+        data << instance_eval(&post_proc).to_s
       end
       pre + data
     end