feat(mem0-ts): add MongoDB vector store provider to OSS TypeScript SDK (#5793)

Co-authored-by: kartik-mem0 <kartik.labhshetwar@mem0.ai>

docs/components/vectordbs/dbs/mongodb.mdx

@@ -2,13 +2,15 @@
 title: "MongoDB"
 description: "Use MongoDB as a vector database in Mem0 with built-in vector search for high-dimensional similarity queries."
 ---
+
 # MongoDB
 
 [MongoDB](https://www.mongodb.com/) is a versatile document database that supports vector search capabilities, allowing for efficient high-dimensional similarity searches over large datasets with robust scalability and performance.
 
 ## Usage
 
-```python
+<CodeGroup>
+```python Python
 import os
 from mem0 import Memory
 
@@ -20,30 +22,90 @@ config = {
         "config": {
             "db_name": "mem0-db",
             "collection_name": "mem0-collection",
-            "mongo_uri":"mongodb://username:password@localhost:27017"
+            "mongo_uri": "mongodb://username:password@localhost:27017"
         }
     }
 }
 
 m = Memory.from_config(config)
 messages = [
-    {"role": "user", "content": "I'm planning to watch a movie tonight. Any recommendations?"},
-    {"role": "assistant", "content": "How about thriller movies? They can be quite engaging."},
-    {"role": "user", "content": "I’m not a big fan of thriller movies but I love sci-fi movies."},
-    {"role": "assistant", "content": "Got it! I'll avoid thriller recommendations and suggest sci-fi movies in the future."}
+    {
+        "role": "user",
+        "content": "I'm planning to watch a movie tonight. Any recommendations?",
+    },
+    {
+        "role": "assistant",
+        "content": "How about thriller movies? They can be quite engaging.",
+    },
+    {
+        "role": "user",
+        "content": "I’m not a big fan of thriller movies but I love sci-fi movies.",
+    },
+    {
+        "role": "assistant",
+        "content": "Got it! I'll avoid thriller recommendations and suggest sci-fi movies in the future.",
+    },
 ]
+
 m.add(messages, user_id="alice", metadata={"category": "movies"})
 ```
 
+```typescript TypeScript
+import { Memory } from "mem0ai/oss";
+
+const config = {
+  vectorStore: {
+    provider: "mongodb",
+    config: {
+      dbName: "mem0-db",
+      collectionName: "mem0-collection",
+      url: "mongodb://username:password@localhost:27017",
+    },
+  },
+};
+
+const memory = new Memory(config);
+
+const messages = [
+  {
+    role: "user",
+    content: "I'm planning to watch a movie tonight. Any recommendations?",
+  },
+  {
+    role: "assistant",
+    content: "How about thriller movies? They can be quite engaging.",
+  },
+  {
+    role: "user",
+    content: "I’m not a big fan of thriller movies but I love sci-fi movies.",
+  },
+  {
+    role: "assistant",
+    content:
+      "Got it! I'll avoid thriller recommendations and suggest sci-fi movies in the future.",
+  },
+];
+
+await memory.add(messages, {
+  userId: "alice",
+  metadata: {
+    category: "movies",
+  },
+});
+```
+</CodeGroup>
+
 ## Config
 
 Here are the parameters available for configuring MongoDB:
 
-| Parameter | Description | Default Value |
-| --- | --- | --- |
-| db_name | Name of the MongoDB database | `"mem0_db"` |
-| collection_name | Name of the MongoDB collection | `"mem0"` |
-| embedding_model_dims | Dimensions of the embedding vectors | `1536` |
-| mongo_uri | The MongoDB URI connection string | `mongodb://localhost:27017` |
+| Python | TypeScript | Description | Default Value |
+| --- | --- | --- | --- |
+| db_name | dbName | Name of the MongoDB database | "mem0_db" |
+| collection_name | collectionName | Name of the MongoDB collection | "mem0" |
+| embedding_model_dims | embeddingModelDims | Dimensions of the embedding vectors | 1536 |
+| mongo_uri | url | The MongoDB URI connection string | mongodb://localhost:27017 |
 
-> **Note**: If `mongo_uri` is not provided, it will default to `mongodb://localhost:27017`.
+> **Note**: If `mongo_uri` (Python) or `url` (TypeScript) is not provided, it defaults to `mongodb://localhost:27017`. A local instance must be running MongoDB v8.2+ for vector search to work.
+
+> **Note**: The vector search index builds asynchronously after the first write. A search issued right after the first `add()` may return no results (and log an "index not initialized" message) until the index finishes building. This takes a few seconds on a local deployment and up to about a minute on Atlas. This is expected; the search returns results once the index is ready.