From cd67a526d2f14c2c2d74ee5bce8e473321c17cb1 Mon Sep 17 00:00:00 2001
From: Syphax Bouazzouni <gs_bouazzouni@esi.dz>
Date: Tue, 28 Feb 2023 02:51:10 +0100
Subject: [PATCH] migrate uniqueness validator to the new DSL

---
 lib/goo/validators/implementations/unique.rb | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 lib/goo/validators/implementations/unique.rb

diff --git a/lib/goo/validators/implementations/unique.rb b/lib/goo/validators/implementations/unique.rb
new file mode 100644
index 000000000..feb13a4b5
--- /dev/null
+++ b/lib/goo/validators/implementations/unique.rb
@@ -0,0 +1,20 @@
+module Goo
+  module Validators
+    class Unique < ValidatorBase
+      include Validator
+
+      key :unique
+
+      error_message ->(obj) { "`#{@attr}` must be unique. " +
+        "There are other model instances with the same attribute value `#{@value}`."}
+
+      validity_check -> (obj) do
+        return true if @value.nil?
+
+        !Goo::SPARQL::Queries.duplicate_attribute_value?(@inst,@attr)
+      end
+
+
+    end
+  end
+end
\ No newline at end of file