docs/database-schema-readme.md

@@ -191,7 +191,7 @@ Settings (1) → MembershipFeeType (0..1)
 - Join date cannot be in future
 - Exit date must be after join date
 - Phone: `+?[0-9\- ]{6,20}`
-- Postal code: 5 digits
+- Postal code: optional (no format validation)
 
 ### CustomFieldValue System
 - Maximum one custom field value per custom field per member

docs/database_schema.dbml

@@ -188,7 +188,7 @@ Table members {
     - email: 5-254 characters, valid email format (required)
     - join_date: cannot be in future
     - exit_date: must be after join_date (if both present)
-    - postal_code: exactly 5 digits (if present)
+    - postal_code: optional (no format validation)
   '''
 }
 

lib/membership/member.ex

@@ -22,7 +22,6 @@ defmodule Mv.Membership.Member do
   ## Validations
   - Required: email (all other fields are optional)
   - Email format validation (using EctoCommons.EmailValidator)
-  - Postal code format: exactly 5 digits (German format)
   - Date validations: join_date not in future, exit_date after join_date
   - Email uniqueness: prevents conflicts with unlinked users
   - Linked member email change: only admins or the linked user may change a linked member's email (see `Mv.Membership.Member.Validations.EmailChangePermission`)
@@ -458,11 +457,6 @@ defmodule Mv.Membership.Member do
       where: [present([:join_date, :exit_date])],
       message: "cannot be before join date"
 
-    # Postal code format (only if set)
-    validate match(:postal_code, ~r/^\d{5}$/),
-      where: [present(:postal_code)],
-      message: "must consist of 5 digits"
-
     # Email validation with EctoCommons.EmailValidator
     validate fn changeset, _ ->
       email = Ash.Changeset.get_attribute(changeset, :email)

test/membership/member_test.exs

@@ -80,15 +80,9 @@ defmodule Mv.Membership.MemberTest do
       assert {:ok, _member} = Membership.create_member(attrs, actor: actor)
     end
 
-    test "Postal code is optional but must have 5 digits if specified", %{actor: actor} do
-      attrs = Map.put(@valid_attrs, :postal_code, "1234")
-
-      assert {:error, %Ash.Error.Invalid{errors: errors}} =
-               Membership.create_member(attrs, actor: actor)
-
-      assert error_message(errors, :postal_code) =~ "must consist of 5 digits"
-      attrs2 = Map.delete(@valid_attrs, :postal_code)
-      assert {:ok, _member} = Membership.create_member(attrs2, actor: actor)
+    test "Postal code is optional", %{actor: actor} do
+      attrs = Map.delete(@valid_attrs, :postal_code)
+      assert {:ok, _member} = Membership.create_member(attrs, actor: actor)
     end
   end