From 68e073bc07281ebbfe0cef4008a3c2ff0006d953 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Ad=C3=A1mek?= <banan23@gmail.com>
Date: Fri, 10 Feb 2023 18:21:29 +0100
Subject: [PATCH] feat(core): optionally log if entity is managed or not

```ts
process.env.MIKRO_ORM_LOG_EM_ID = '1';
// prints something like `User [managed by 3] { ... }`
console.log(user);
```
---
 packages/core/src/entity/EntityHelper.ts | 10 ++++++++++
 tests/EntityHelper.mongo.test.ts         | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/packages/core/src/entity/EntityHelper.ts b/packages/core/src/entity/EntityHelper.ts
index 9b5f5b1c9131..3874167ae7b5 100644
--- a/packages/core/src/entity/EntityHelper.ts
+++ b/packages/core/src/entity/EntityHelper.ts
@@ -124,6 +124,16 @@ export class EntityHelper {
       const ret = inspect(object, { depth });
       let name = (this as object).constructor.name;
 
+      const showEM = ['true', 't', '1'].includes(process.env.MIKRO_ORM_LOG_EM_ID?.toString().toLowerCase() ?? '');
+
+      if (showEM) {
+        if (helper(this).__em) {
+          name += ` [managed by ${helper(this).__em.id}]`;
+        } else {
+          name += ` [not managed]`;
+        }
+      }
+
       // distinguish not initialized entities
       if (!helper(this).__initialized) {
         name = `(${name})`;
diff --git a/tests/EntityHelper.mongo.test.ts b/tests/EntityHelper.mongo.test.ts
index 6e7f7543530f..68b04974906e 100644
--- a/tests/EntityHelper.mongo.test.ts
+++ b/tests/EntityHelper.mongo.test.ts
@@ -205,6 +205,16 @@ describe('EntityHelperMongo', () => {
       "  baz: (FooBaz) { _id: ObjectId('5b0ff0619fbec620008d2414') }\n" +
       '}');
 
+    process.env.MIKRO_ORM_LOG_EM_ID = '1';
+    actual = inspect(bar);
+    process.env.MIKRO_ORM_LOG_EM_ID = '0';
+
+    expect(actual).toBe('FooBar [not managed] {\n' +
+      '  meta: { onCreateCalled: false, onUpdateCalled: false },\n' +
+      "  name: 'bar',\n" +
+      "  baz: (FooBaz [managed by 1]) { _id: ObjectId('5b0ff0619fbec620008d2414') }\n" +
+      '}');
+
     const god = new Author('God', 'hello@heaven.god');
     const bible = new Book('Bible', god);
     bible.createdAt = new Date('2020-07-18T17:31:08.535Z');