From c10228e344887bc98717c4b3f2ec92f3262fd5ef Mon Sep 17 00:00:00 2001
From: Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi>
Date: Thu, 14 Nov 2013 13:37:00 +0200
Subject: model: collection size checking with # operator

---
 acf2/model/node.lua | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'acf2/model/node.lua')

diff --git a/acf2/model/node.lua b/acf2/model/node.lua
index 9342e83..078a607 100644
--- a/acf2/model/node.lua
+++ b/acf2/model/node.lua
@@ -180,6 +180,8 @@ function M.Collection:init(context, params)
 
    function mt.members() return mt.txn:get(mt.addr) or {} end
 
+   function mt.__len() return #mt.members() end
+
    function mt.validate()
       if #mt.members() > 0 then return end
       if params.required then raise(mt.path, 'Collection cannot be empty') end
-- 
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