diff --git a/src/wanijo/schema/domain.clj b/src/wanijo/schema/domain.clj
index 462f136..e5208dc 100644
--- a/src/wanijo/schema/domain.clj
+++ b/src/wanijo/schema/domain.clj
@@ -9,11 +9,13 @@
   (spec/and string? ::neo4j/date-str))
 
 (spec/def ::assigned-to
-  (complement empty?))
+  (spec/or :public empty?
+           :assigned (spec/coll-of string?)
+           :single string?))
 
 (neo4j/defquery
   all-created-by
-  "MATCH (s:schema)-->(u:user)
+  "MATCH (s:schema)-[:created_by]->(u:user)
    WHERE u.uuid = {uuid}
    RETURN s
    ORDER BY s.name")
@@ -130,3 +132,25 @@
 (defn find-with-assigned-users! [uuid]
   (assoc (find-by-uuid! uuid)
           :assigned (map :uuid (assigned-users! uuid))))
+
+(neo4j/defquery
+  remove-assignments
+  "MATCH (s:schema)-[c:assigned_to]-(:user)
+   WHERE s.uuid = {uuid}
+   DELETE c")
+
+(neo4j/defquery
+  create-assignment
+  "MATCH (s:schema), (u:user)
+   WHERE s.uuid = {uuid}
+     AND u.uuid IN {users}
+   CREATE (s)-[:assigned_to]->(u)")
+
+(defn assign-users! [uuid users]
+  (neo4j/exec-query!
+   remove-assignments
+   {:uuid uuid})
+  (neo4j/exec-query!
+   create-assignment
+   {:uuid uuid
+    :users users}))
diff --git a/src/wanijo/schema/routes.clj b/src/wanijo/schema/routes.clj
index 6aba681..90e2fb6 100644
--- a/src/wanijo/schema/routes.clj
+++ b/src/wanijo/schema/routes.clj
@@ -40,14 +40,24 @@
   (view-schema/show-schema!
    (domain/find-with-assigned-users! uuid)
    (domain-attr/find-by-schema! uuid)
-   (assoc-in view-schema/access-form
+   (assoc-in view-schema/assign-form
              [:fields :assigned :options]
              (map #(vector (:ident %) (:uuid %))
                   (domain-user/all!)))
    req))
 
 (defn assign! [req]
-  (println (:params req)))
+  (let [uuid (get-in req [:params :uuid])
+        users (get-in req [:params :assigned])]
+    (println (:params req))
+    (if (form/valid? view-schema/assign-form req)
+      (do
+        (domain/assign-users! uuid
+                              (if (vector? users)
+                                users
+                                [users]))
+        (resp/redirect (path :schema-show (:params req))))
+      (view! uuid req))))
 
 (defroutes routes
   (GET (register! :schema-overview "/schema")
diff --git a/src/wanijo/schema/view.clj b/src/wanijo/schema/view.clj
index 3fca735..d02f616 100644
--- a/src/wanijo/schema/view.clj
+++ b/src/wanijo/schema/view.clj
@@ -29,10 +29,10 @@
                        :spec ::attr-domain/required
                        :widget :checkbox}}})
 
-(def access-form
+(def assign-form
   {:fields {:assigned {:label "Users"
                        :required false
-                       :spec :a
+                       :spec ::domain/assigned-to
                        :widget :mselect}}})
 
 (defn overview! [req]
@@ -61,7 +61,7 @@
                      (form/render-widgets form {} req)
                      (hform/submit-button "Create"))])))
 
-(defn show-schema! [schema attrs access-form req]
+(defn show-schema! [schema attrs assign-form req]
   (view/layout!
    :session (:session req)
    :content
@@ -74,7 +74,7 @@
                    (hform/submit-button "Edit"))
     [:h3 "Assign to users"]
     (hform/form-to [:post (path :schema-assign)]
-                   (form/render-widgets access-form schema req)
+                   (form/render-widgets assign-form schema req)
                    (hform/hidden-field "uuid" (:uuid schema))
                    (hform/submit-button "Assign"))
     [:h2 "Attributes"]