fix(orm): handle self-referential relations in delegate models during schema push (#2449)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: ymc9

packages/orm/src/client/helpers/schema-db-pusher.ts

@@ -84,6 +84,10 @@ export class SchemaDbPusher<Schema extends SchemaDef> {
             for (const field of Object.values(model.fields)) {
                 // relation order
                 if (field.relation && field.relation.fields && field.relation.references) {
+                    // skip self-referential relations to avoid false cycle in toposort
+                    if (field.type === model.name) {
+                        continue;
+                    }
                     const targetModel = requireModel(this.schema, field.type);
                     // edge: fk side -> target model
                     graph.push([model, targetModel]);

tests/regression/test/issue-2435.test.ts

@@ -0,0 +1,37 @@
+import { createTestClient } from '@zenstackhq/testtools';
+import { describe, expect, it } from 'vitest';
+
+// https://github.com/zenstackhq/zenstack/issues/2435
+describe('Regression for issue 2435', () => {
+    it('should not throw cyclic dependency error when delegate model has a self-referential relation', async () => {
+        await expect(
+            createTestClient(
+                `
+enum ContentType {
+    POST
+    ARTICLE
+    QUESTION
+}
+
+model Content {
+    id   Int         @id @default(autoincrement())
+    type ContentType
+    @@delegate(type)
+}
+
+model Post extends Content {
+    post1s   Post1[]
+    replies  Post[]  @relation("PostReplies")
+    parentId Int?
+    parent   Post?   @relation("PostReplies", fields: [parentId], references: [id])
+}
+
+model Post1 extends Content {
+    post   Post @relation(fields: [postId], references: [id])
+    postId Int
+}
+        `,
+            ),
+        ).toResolveTruthy();
+    });
+});