Specs

src/avram/charms/uuid_extensions.cr

@@ -1 +1,31 @@
-syntax error in 'STDIN:19:21': unexpected token: )
+struct UUID
+  def self.adapter
+    Lucky
+  end
+
+  module Lucky
+    alias ColumnType = String
+    include Avram::Type
+
+    def parse(value : UUID)
+      success(value)
+    end
+
+    def parse(values : Array(UUID))
+      success values
+    end
+
+    def parse(value : String)
+      success(value)
+    rescue
+      fail
+    end
+
+    def to_db(value : UUID)
+      value.to_s
+    end
+
+    class Criteria(T, V) < Avram::Criteria(T, V)
+    end
+  end
+end

src/avram/type.cr

@@ -34,8 +34,8 @@ module Avram::Type
     to_db(parsed_value)
   end
 
-  def success(value)
-    success(value)
+  def success(value : T) : SuccessfulCast(T) forall T
+    SuccessfulCast(T).new(value)
   end
 
   def fail