Use postgresql_privs

roles/postgresql_server/tasks/main.yml

@@ -57,7 +57,17 @@
     db: "{{ item.database }}"
     name: "{{ item.name }}"
     password: "{{ item.password }}"
-    priv: "{{ item.priv }}"
   no_log: true
   loop: "{{ postgresql_users }}"
+
+- name: Grant privileges to users
+  become: true
+  become_user: postgres
+  postgresql_privs:
+    db: postgres
+    type: database
+    role: "{{ item.name }}"
+    privs: "{{ item.privs | join(',') }}"
+    obj: "{{ item.database }}"
+  loop: "{{ postgresql_users }}"
 ...