fix(core): Validate non-nullable custom fields

packages/core/e2e/custom-fields.e2e-spec.ts

@@ -262,7 +262,7 @@ describe('Custom fields', () => {
                     }
                 }
             `);
-        }, 'NOT NULL constraint failed: product.customFieldsNotnullable'),
+        }, "The custom field 'notNullable' value cannot be set to null"),
     );
 
     it(

packages/core/src/api/common/validate-custom-field-value.ts

@@ -25,6 +25,13 @@ export function validateCustomFieldValue(
     if (config.readonly) {
         throw new UserInputError('error.field-invalid-readonly', { name: config.name });
     }
+    if (config.nullable === false) {
+        if (value === null) {
+            throw new UserInputError('error.field-invalid-non-nullable', {
+                name: config.name,
+            });
+        }
+    }
     switch (config.type) {
         case 'string':
         case 'localeString':

packages/core/src/i18n/messages/en.json

@@ -27,6 +27,7 @@
     "entity-with-id-not-found": "No { entityName } with the id '{ id }' could be found",
     "field-invalid-datetime-range-max": "The custom field '{ name }' value [{ value }] is greater than the maximum [{ max }]",
     "field-invalid-datetime-range-min": "The custom field '{ name }' value [{ value }] is less than the minimum [{ min }]",
+    "field-invalid-non-nullable": "The custom field '{ name }' value cannot be set to null",
     "field-invalid-number-range-max": "The custom field '{ name }' value [{ value }] is greater than the maximum [{ max }]",
     "field-invalid-number-range-min": "The custom field '{ name }' value [{ value }] is less than the minimum [{ min }]",
     "field-invalid-readonly": "The custom field '{ name }' is readonly",