cloudsben · July 26, 2016 11:39 · Jul 26, 2016
diff --git a/is_presence b/is_presence
@@ -0,0 +1,14 @@
+# 查询字段是否为验证字段，如果是验证字段返回 false 不是 返回 true
+  def is_presence poi, field
+    presence_fields = poi.constantize.validators.map do | v |
+      if v.is_a? ActiveRecord::Validations::PresenceValidator
+        v.attributes
+      end
+    end
+    # 去 nil 并 二维转一维
+    if presence_fields.compact.flatten.exclude?(field)
+      return true
+    else
+      return false
+    end
+  end