INTPYTHON-474 Add missing links in readme (#67)

Author: blink1073

README.md

@@ -24,16 +24,17 @@ It contains the following packages.
 - Retrievers
     - [MongoDBAtlasHybridSearchRetriever](https://python.langchain.com/docs/integrations/providers/mongodb_atlas/#hybrid-search-retriever)
     - [MongoDBAtlasFullTextSearchRetriever](https://python.langchain.com/docs/integrations/providers/mongodb_atlas/#full-text-search-retriever)
-    - `MongoDBAtlasParentDocumentRetriever` - new feature, docs coming soon!
+    - [MongoDBAtlasParentDocumentRetriever](https://langchain-mongodb.readthedocs.io/en/latest/langchain_mongodb/retrievers/langchain_mongodb.retrievers.parent_document.MongoDBAtlasParentDocumentRetriever.html#langchain_mongodb.retrievers.parent_document.MongoDBAtlasParentDocumentRetriever)
 - Indexing
-    - `MongoDBRecordManager` - new feature, docs coming soon!
+    - [MongoDBRecordManager](https://langchain-mongodb.readthedocs.io/en/latest/langchain_mongodb/indexes/langchain_mongodb.indexes.MongoDBRecordManager.html#langchain_mongodb.indexes.MongoDBRecordManager)
 - Loading
-    - `MongoDBLoader` - new feature, docs coming soon!
+    - [MongoDBLoader](https://langchain-mongodb.readthedocs.io/en/latest/langchain_mongodb/loaders/langchain_mongodb.loaders.MongoDBLoader.html#langchain_mongodb.loaders.MongoDBLoader)
 
 ### LangGraph
 
 - Checkpointing
-    - `MongoDBSaver` - new feature, docs coming soon!
+    - [MongoDBSaver](https://langchain-mongodb.readthedocs.io/en/latest/langgraph_checkpoint_mongodb/checkpoint/langgraph.checkpoint.mongodb.saver.MongoDBSaver.html#langgraph.checkpoint.mongodb.saver.MongoDBSaver)
+    - [AsyncMongoDBSaver](https://langchain-mongodb.readthedocs.io/en/latest/langgraph_checkpoint_mongodb/checkpoint/langgraph.checkpoint.mongodb.aio.AsyncMongoDBSaver.html)
 
 ## Installation
 
@@ -55,6 +56,8 @@ See [langchain-mongodb usage](libs/langchain-mongodb/README.md#usage) and [langg
 
 For more detailed usage examples and documentation, please refer to the [LangChain documentation](https://python.langchain.com/docs/integrations/providers/mongodb_atlas/).
 
+API docs can be found on [ReadTheDocs](https://langchain-mongodb.readthedocs.io/en/latest/index.html).
+
 ## Contributing
 
 See the [Contributing Guide](CONTRIBUTING.md).

libs/langchain-mongodb/langchain_mongodb/indexes.py

@@ -18,10 +18,17 @@ class MongoDBRecordManager(RecordManager):
     def __init__(self, collection: Collection) -> None:
         """Initialize the MongoDBRecordManager.
 
+        The record manager abstraction is used by the langchain indexing API.
+        The record manager keeps track of which documents have been written into a vectorstore and when they were written.
+        For more details, see the `RecordManager API Docs`_.
+
         Args:
             connection_string: A valid MongoDB connection URI.
             db_name: The name of the database to use.
             collection_name: The name of the collection to use.
+
+        .. _RecordManager API Docs:
+            https://python.langchain.com/api_reference/core/indexing/langchain_core.indexing.base.RecordManager.html
         """
         namespace = f"{collection.database.name}.{collection.name}"
         super().__init__(namespace=namespace)

libs/langchain-mongodb/langchain_mongodb/loaders.py

@@ -14,7 +14,9 @@
 
 
 class MongoDBLoader(BaseLoader):
-    """Load MongoDB documents."""
+    """Document Loaders are classes to load Documents.
+
+    Document Loaders are usually used to load a lot of Documents in a single run."""
 
     def __init__(
         self,