diff --git a/src/wanijo/attribute/domain.clj b/src/wanijo/attribute/domain.clj
index cda31f7..0b77ee0 100644
--- a/src/wanijo/attribute/domain.clj
+++ b/src/wanijo/attribute/domain.clj
@@ -11,9 +11,6 @@
 (spec/def ::type
   (spec/and string? types))
 
-(spec/def ::required
-  #{"on" nil 0 1 "0" "1"})
-
 (spec/def ::created-at
   (spec/and string? ::neo4j/date-str))
 
@@ -84,3 +81,13 @@
   (map :a
        (neo4j/exec-query! required
                           {:schema_uuid schema-uuid})))
+
+(neo4j/defquery schema-of
+  "MATCH (a:attribute {uuid:{uuid}})-[:of]->(s:schema)
+   RETURN s")
+
+(defn schema-of! [uuid]
+  (->> (neo4j/exec-query! schema-of
+                          {:uuid uuid})
+       (map :s)
+       first))
diff --git a/src/wanijo/attribute/routes.clj b/src/wanijo/attribute/routes.clj
index 9e6b407..4c7078f 100644
--- a/src/wanijo/attribute/routes.clj
+++ b/src/wanijo/attribute/routes.clj
@@ -1,5 +1,6 @@
 (ns wanijo.attribute.routes
-  (:require [compojure.core :refer [defroutes GET POST DELETE]]
+  (:require [compojure.core :refer [defroutes GET POST DELETE] :as comp]
+            [clojure.pprint :refer [pprint]]
             [ring.util.response :as resp]
             [formulare.core :as form]
             [wanijo.framework.routing :refer [register! path]]
@@ -31,9 +32,16 @@
   (domain/delete-by-uuid! uuid)
   (resp/redirect (path :schema-show {:uuid (get-in req [:params :schema])})))
 
-(defroutes routes
-  (POST (register! :attribute-new "/attribute/new")
-        []
+(defn wrap-allowed-to-write []
+  (schema-routes/write-permission-middleware
+   #(or (get-in % [:params :schema])
+        (get-in % [:route-params :schema])
+        (-> (get-in % [:route-params :uuid])
+            (domain/schema-of!)
+            :uuid))))
+
+(defroutes write-routes
+  (POST (register! :attribute-new "/attribute/new") []
         new!)
   (POST (register! :attribute-edit "/attribute/edit/:schema")
         [schema :as req]
@@ -41,3 +49,7 @@
   (DELETE (register! :attribute-delete "/attribute/:uuid/delete")
           [uuid :as req]
           (delete! uuid req)))
+
+(defroutes routes
+  (comp/wrap-routes write-routes
+                    (wrap-allowed-to-write)))
diff --git a/src/wanijo/schema/forms.clj b/src/wanijo/schema/forms.clj
index 891f6b7..28e04e3 100644
--- a/src/wanijo/schema/forms.clj
+++ b/src/wanijo/schema/forms.clj
@@ -15,7 +15,7 @@
                                            (not= attr-uuid (:uuid %))))
                                 1 0))
                         (apply +))]
-    (not= 0 duplicates)))
+    (= 0 duplicates)))
 
 (spec/def ::unique-attr-name-per-schema
   unique-attr-name-in-schema!)
@@ -29,8 +29,7 @@
 (def attr-form
   {:fields {:name {:label "Name"
                    :required true
-                   :spec ::attr-domain/name
-                   }
+                   :spec ::attr-domain/name}
             :type {:label "Type"
                    :required true
                    :spec ::attr-domain/type
@@ -39,7 +38,6 @@
                                  attr-domain/types)}
             :required {:label "Required"
                        :required false
-                       :spec ::attr-domain/required
                        :widget :checkbox
                        :from-req #(if (some? %) 1 0)}
             :uuid {:widget :hidden}}
diff --git a/src/wanijo/schema/routes.clj b/src/wanijo/schema/routes.clj
index f5d9e56..51de1d6 100644
--- a/src/wanijo/schema/routes.clj
+++ b/src/wanijo/schema/routes.clj
@@ -63,15 +63,19 @@
         (resp/redirect (path :schema-show (:params req))))
       (view! uuid req))))
 
-(defn wrap-allowed-to-write [handler]
-  (fn [req]
-    (let [uuid (get-in req [:params :uuid])
-          user (get-in req [:session :uuid])]
-      (if (domain/has-user-write-permissions? uuid user)
-        (handler req)
-        (assoc
-         (resp/redirect (path :schema-show (:params req)))
-         :flash ["No write permission for schema"])))))
+(defn write-permission-middleware [schema-fn]
+  (fn [handler]
+    (fn [req]
+      (let [uuid (schema-fn req)
+            check-fn domain/has-user-write-permissions?]
+        (if (check-fn uuid (get-in req [:session :uuid]))
+          (handler req)
+          (assoc
+           (resp/redirect (path :schema-show {:uuid uuid}))
+           :flash ["No write permission for schema"]))))))
+
+(defn wrap-allowed-to-write []
+  (write-permission-middleware #(get-in % [:params :uuid])))
 
 (defroutes write-routes
   (POST (register! :schema-edit "/schema/edit") []
@@ -93,4 +97,4 @@
   (POST (register! :schema-new "/schema/new") []
         new!)
   (comp/wrap-routes write-routes
-                    wrap-allowed-to-write))
+                    (wrap-allowed-to-write)))