fix: eager load with nested association (#2002)

packages/core/database/src/__tests__/inhertits/collection-inherits.test.ts

@@ -73,7 +73,10 @@ pgOnly()('collection inherits', () => {
   it('should append collection name in eager load', async () => {
     const rootCollection = db.collection({
       name: 'assoc',
-      fields: [{ name: 'name', type: 'string' }],
+      fields: [
+        { name: 'name', type: 'string' },
+        { type: 'belongsToMany', name: 'other-assocs' },
+      ],
     });
 
     const childCollection = db.collection({
@@ -81,6 +84,11 @@ pgOnly()('collection inherits', () => {
       inherits: ['assoc'],
     });
 
+    const otherAssoc = db.collection({
+      name: 'other-assocs',
+      fields: [{ name: 'name', type: 'string' }],
+    });
+
     const User = db.collection({
       name: 'users',
       fields: [
@@ -116,7 +124,7 @@ pgOnly()('collection inherits', () => {
     });
 
     const users = await User.repository.find({
-      appends: ['assocs'],
+      appends: ['assocs.other-assocs'],
     });
 
     const user = users[0];

packages/core/database/src/eager-loading/eager-loading-tree.ts

@@ -27,6 +27,12 @@ const EagerLoadingNodeProto = {
     const collection = db.modelCollection.get(this.model);
 
     if (collection && collection.isParent()) {
+      if (!this.attributes) {
+        this.attributes = {
+          include: [],
+        };
+      }
+
       OptionsParser.appendInheritInspectAttribute(this.attributes.include, collection);
       this.inspectInheritAttribute = true;
     }