+MongoDB Vector Support (#2367)

Co-authored-by: Divya Gupta <divya.gupta@mongodb.com>

mem0/configs/vector_stores/mongodb.py

@@ -0,0 +1,42 @@
+from typing import Any, Dict, Optional, Callable, List
+
+from pydantic import BaseModel, Field, root_validator
+
+
+class MongoVectorConfig(BaseModel):
+    """Configuration for MongoDB vector database."""
+
+    db_name: str = Field("mem0_db", description="Name of the MongoDB database")
+    collection_name: str = Field("mem0", description="Name of the MongoDB collection")
+    embedding_model_dims: Optional[int] = Field(1536, description="Dimensions of the embedding vectors")
+    user: Optional[str] = Field(None, description="MongoDB user for authentication")
+    password: Optional[str] = Field(None, description="Password for the MongoDB user")
+    host: Optional[str] = Field("localhost", description="MongoDB host. Default is 'localhost'")
+    port: Optional[int] = Field(27017, description="MongoDB port. Default is 27017")
+
+    @root_validator(pre=True)
+    def check_auth_and_connection(cls, values):
+        user = values.get("user")
+        password = values.get("password")
+        if (user is None) != (password is None):
+            raise ValueError("Both 'user' and 'password' must be provided together or omitted together.")
+
+        host = values.get("host")
+        port = values.get("port")
+        if host is None:
+            raise ValueError("The 'host' must be provided.")
+        if port is None:
+            raise ValueError("The 'port' must be provided.")
+        return values
+
+    @root_validator(pre=True)
+    def validate_extra_fields(cls, values: Dict[str, Any]) -> Dict[str, Any]:
+        allowed_fields = set(cls.__fields__)
+        input_fields = set(values.keys())
+        extra_fields = input_fields - allowed_fields
+        if extra_fields:
+            raise ValueError(
+                f"Extra fields not allowed: {', '.join(extra_fields)}. "
+                f"Please provide only the following fields: {', '.join(allowed_fields)}."
+            )
+        return values