fix: Update child's mpath even if parentId was soft-deleted in TreeRepository

src/persistence/tree/MaterializedPathSubjectExecutor.ts

@@ -172,6 +172,7 @@ export class MaterializedPathSubjectExecutor {
                     }
                 }),
             )
+            .withDeleted()
             .getRawOne()
             .then((result) => (result ? result["path"] : ""))
     }

test/github-issues/10843/entity/node.ts

@@ -0,0 +1,36 @@
+import {
+    TreeChildren,
+    TreeParent,
+    Entity,
+    PrimaryGeneratedColumn,
+    DeleteDateColumn,
+    Column,
+    Tree,
+    JoinColumn,
+} from "../../../../src"
+
+@Entity("node")
+@Tree("materialized-path")
+export class Node {
+    @PrimaryGeneratedColumn({ type: "int" })
+    id?: number
+
+    @DeleteDateColumn()
+    deletedAt?: Date
+
+    @Column("varchar")
+    name!: string
+
+    @TreeChildren({ cascade: true })
+    children?: Node[]
+
+    @Column({ type: "int", nullable: true, name: "parentId" })
+    parentId?: number
+
+    @TreeParent()
+    @JoinColumn({
+        name: "parentId",
+        referencedColumnName: "id",
+    })
+    parent?: Node
+}

test/github-issues/10843/issue-10843.ts

@@ -0,0 +1,63 @@
+import "reflect-metadata"
+import {
+    createTestingConnections,
+    closeTestingConnections,
+    reloadTestingDatabases,
+} from "../../utils/test-utils"
+import { DataSource } from "../../../src"
+import { Node } from "./entity/node"
+import { expect } from "chai"
+
+describe("github issues > #10843 TreeRepository does not update mpath if parentId was soft-deleted", () => {
+    let dataSources: DataSource[]
+    before(
+        async () =>
+            (dataSources = await createTestingConnections({
+                entities: [__dirname + "/entity/*{.js,.ts}"],
+                schemaCreate: true,
+                dropSchema: true,
+                relationLoadStrategy: "query",
+                enabledDrivers: ["mysql"],
+            })),
+    )
+    beforeEach(() => reloadTestingDatabases(dataSources))
+    after(() => closeTestingConnections(dataSources))
+
+    it("Should update mpath even if parent was soft deleted", () =>
+        Promise.all(
+            dataSources.map(async (dataSource) => {
+                const nodeRepository = dataSource.getTreeRepository(Node)
+
+                // Entity instances setup
+                const parent = await nodeRepository.save(
+                    nodeRepository.create({ name: "root node" }),
+                )
+                const child = await nodeRepository.save(
+                    nodeRepository.create({ name: "child node", parent }),
+                )
+
+                // Validate mpath
+                let [mpath] = await dataSource.query(
+                    "SELECT mpath FROM node WHERE id = ?",
+                    [child.id],
+                )
+                expect(mpath?.mpath).to.be.equal(`${parent.id}.${child.id}.`)
+                // Soft delete parent
+                await nodeRepository.softDelete(parent)
+
+                // Assign new parent
+                const newParent = await nodeRepository.save(
+                    nodeRepository.create({ name: "root node 2" }),
+                )
+                child.parent = newParent
+                await nodeRepository.save(child)
+
+                ;[mpath] = await dataSource.query(
+                    "SELECT mpath FROM node WHERE id = ?",
+                    [child.id],
+                )
+
+                expect(mpath?.mpath).to.be.equal(`${newParent.id}.${child.id}.`)
+            }),
+        ))
+})