fix: correctly get referenceColumn value in getEntityValueMap (#7005)

* test: add test case (#7002)

* fix: correctly get referenceColumn value in `getEntityValueMap`

src/metadata/ColumnMetadata.ts

@@ -544,9 +544,9 @@ export class ColumnMetadata {
             return Object.keys(map).length > 0 ? map : undefined;
 
         } else { // no embeds - no problems. Simply return column property name and its value of the entity
-            if (this.relationMetadata && entity[this.propertyName] && entity[this.propertyName] instanceof Object) {
+            if (this.relationMetadata && entity[this.relationMetadata.propertyName] && entity[this.relationMetadata.propertyName] instanceof Object) {
                 const map = this.relationMetadata.joinColumns.reduce((map, joinColumn) => {
-                    const value = joinColumn.referencedColumn!.getEntityValueMap(entity[this.propertyName]);
+                    const value = joinColumn.referencedColumn!.getEntityValueMap(entity[this.relationMetadata!.propertyName]);
                     if (value === undefined) return map;
                     return OrmUtils.mergeDeep(map, value);
                 }, {});

test/github-issues/7002/entity/Bar.ts

@@ -0,0 +1,19 @@
+import {
+    Column,
+    Entity,
+    OneToOne,
+    PrimaryGeneratedColumn,
+} from "../../../../src";
+import { Foo } from "./Foo";
+
+@Entity()
+export class Bar {
+    @PrimaryGeneratedColumn("increment")
+    id: number;
+
+    @Column()
+    title: string;
+
+    @OneToOne(() => Foo, foo => foo.bar, { cascade: true, eager: true })
+    foo: Foo;
+}

test/github-issues/7002/entity/Foo.ts

@@ -0,0 +1,25 @@
+import {
+    Column,
+    CreateDateColumn,
+    Entity,
+    JoinColumn,
+    OneToOne,
+    PrimaryColumn,
+} from "../../../../src";
+import { Bar } from "./Bar";
+
+@Entity()
+export class Foo {
+    @PrimaryColumn()
+    id: number;
+
+    @Column()
+    text: string;
+
+    @OneToOne(() => Bar, b => b.foo, { primary: true })
+    @JoinColumn({ name: "id", referencedColumnName: "id" })
+    bar: Bar;
+
+    @CreateDateColumn()
+    d: Date;
+}

test/github-issues/7002/issue-7002.ts

@@ -0,0 +1,40 @@
+import "reflect-metadata";
+
+import { Connection } from "../../../src/connection/Connection";
+import {
+    closeTestingConnections,
+    createTestingConnections,
+    reloadTestingDatabases,
+} from "../../utils/test-utils";
+import { Bar } from "./entity/Bar";
+import { Foo } from "./entity/Foo";
+
+describe("github issues > #7002 cascade save fails if the child entity has CreateDateColumn and PK as JoinColumn", () => {
+    let connections: Connection[];
+    before(
+        async () =>
+            (connections = await createTestingConnections({
+                entities: [__dirname + "/entity/*{.js,.ts}"],
+                schemaCreate: true,
+                dropSchema: true,
+                enabledDrivers: ["mysql", "postgres"],
+            }))
+    );
+    beforeEach(() => reloadTestingDatabases(connections));
+    after(() => closeTestingConnections(connections));
+
+    it("save an entity having a child entity with shared PK and CreatedDateColumn by cascade", () =>
+        Promise.all(
+            connections.map(async (connection) => {
+                const foo = new Foo();
+                foo.text = "This is a feature post";
+
+                await connection.manager.save(
+                    connection.getRepository(Bar).create({
+                        title: "Feature Post",
+                        foo,
+                    })
+                );
+            })
+        ));
+});