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.

1 files changed, 2 insertions, 2 deletions

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