feat: Add validation constraints and tests for CustomField and CustomFieldValue

lib/membership/custom_field_value.ex

@@ -30,6 +30,11 @@ defmodule Mv.Membership.CustomFieldValue do
   ## Constraints
   - Each member can have only one custom field value per custom field (unique composite index)
   - Custom field values are deleted when the associated member is deleted (CASCADE)
+  - String values maximum length: 10,000 characters
+  - Email values maximum length: 254 characters (RFC 5321)
+
+  ## Future Features
+  - Type-matching validation (value type must match custom field's value_type) - to be implemented
   """
   use Ash.Resource,
     domain: Mv.Membership,
@@ -56,11 +61,25 @@ defmodule Mv.Membership.CustomFieldValue do
       constraints: [
         storage: :type_and_value,
         types: [
-          boolean: [type: :boolean],
-          date: [type: :date],
-          integer: [type: :integer],
-          string: [type: :string],
-          email: [type: Mv.Membership.Email]
+          boolean: [
+            type: :boolean
+          ],
+          date: [
+            type: :date
+          ],
+          integer: [
+            type: :integer
+          ],
+          string: [
+            type: :string,
+            constraints: [
+              max_length: 10_000,
+              trim?: true
+            ]
+          ],
+          email: [
+            type: Mv.Membership.Email
+          ]
         ]
       ]
   end