[form] Fix nested additional properties id's inference

Author: x0k

.changeset/warm-actors-compare.md

@@ -0,0 +1,5 @@
+---
+"@sjsf/form": patch
+---
+
+Fix nested additional properties id's inference

packages/form/src/form/context/id-schema.ts

@@ -48,3 +48,11 @@ export function makeArrayItemId(
 ) {
   return `${parentId}${ctx.idSeparator}${index}`;
 }
+
+export function makeObjectPropertyId(
+  ctx: FormContext,
+  parentId: string,
+  property: string
+) {
+  return `${parentId}${ctx.idSeparator}${property}`
+}

packages/form/src/form/fields/object/object-field.svelte

@@ -14,7 +14,6 @@
   } from "@/core/index.js";
 
   import type { UiSchema } from "../../ui-schema.js";
-  import { FAKE_ID_SCHEMA } from "../../id-schema.js";
   import {
     getTemplate,
     getComponent,
@@ -26,6 +25,8 @@
     retrieveSchema,
     getFormContext,
     validateField,
+    makeIdSchema,
+    makeObjectPropertyId,
   } from "../../context/index.js";
   import { AFTER_SUBMITTED, ON_OBJECT_CHANGE } from "../../validation.js";
 
@@ -181,7 +182,14 @@
           schema: propSchema,
           uiSchema: propUiSchema,
           uiOptions: propUiOptions,
-          idSchema: config.idSchema[property] ?? FAKE_ID_SCHEMA,
+          idSchema:
+            config.idSchema[property] ??
+            makeIdSchema(
+              ctx,
+              propSchema,
+              makeObjectPropertyId(ctx, config.idSchema.$id, property),
+              value[property]
+            ),
           required: requiredProperties.has(property),
         }}
       />