init project

app/libs/util/uuid.rb

@@ -0,0 +1,27 @@
+module Util
+  module UUID
+    module_function
+
+    DCODES = %W(2 3 4 5 6 7 8 9 a b c f e f g h i j k l m n o p q r s t u v w x y z)
+
+    def time_uuid(format: '%Y%m%d%H%M%S', suffix: 8)
+      "#{Time.zone.now.strftime(format)}#{Random.rand(10**suffix).to_i}"
+    end
+
+    # 随机生成字符
+    def generate_identifier(container, num, pre='')
+      code = DCODES.sample(num).join
+      if container == User
+        while container.exists?(login: pre+code) do
+          code = DCODES.sample(num).join
+        end
+      else
+        while container.exists?(identifier: code) do
+          code = DCODES.sample(num).join
+        end
+      end
+      code
+    end
+
+  end
+end