Add support for MongoDB

.env.sample

@@ -118,3 +118,19 @@ PROMPTFLOW_RESPONSE_TIMEOUT=120
 PROMPTFLOW_REQUEST_FIELD_NAME=query
 PROMPTFLOW_RESPONSE_FIELD_NAME=reply
 PROMPTFLOW_CITATIONS_FIELD_NAME=documents
+# Chat with data: MongoDB database
+MONGODB_ENDPOINT=
+MONGODB_USERNAME=
+MONGODB_PASSWORD=
+MONGODB_DATABASE_NAME=
+MONGODB_COLLECTION_NAME=
+MONGODB_APP_NAME=
+MONGODB_INDEX_NAME=
+MONGODB_TOP_K=
+MONGODB_STRICTNESS=
+MONGODB_ENABLE_IN_DOMAIN=
+MONGODB_CONTENT_COLUMNS=
+MONGODB_FILENAME_COLUMN=
+MONGODB_TITLE_COLUMN=
+MONGODB_URL_COLUMN=
+MONGODB_VECTOR_COLUMNS=

README.md

@@ -10,6 +10,7 @@ This repo contains sample code for a simple chat webapp that integrates with Azu
   - Elasticsearch index (preview)
   - Pinecone index (private preview)
   - Azure SQL Server (private preview)
+  - Mongo DB (preview)
 
 ## Configure the app
 
@@ -283,6 +284,34 @@ Note: RBAC assignments can take a few minutes before becoming effective.
     - `AZURE_OPENAI_EMBEDDING_NAME`: the name of your Ada (text-embedding-ada-002) model deployment on your Azure OpenAI resource.
     - `PINECONE_VECTOR_COLUMNS`: the vector columns in your index to use when searching. Join them with `|` like `contentVector|titleVector`.
 
+#### Chat with your data using Mongo DB (Private Preview)
+
+1. Update the `AZURE_OPENAI_*` environment variables as described in the [basic chat experience](#basic-chat-experience) above. 
+
+2. To connect to your data, you need to specify an Mongo DB database configuration.  Learn more about [MongoDB](https://www.mongodb.com/).
+
+3. Configure data source settings as described in the table below.
+
+    | App Setting | Required? | Default Value | Note |
+    | --- | --- | --- | ------------- |
+    |DATASOURCE_TYPE|Yes||Must be set to `MongoDB`|
+    |MONGODB_CONNECTION_STRING|Yes||The connection string used to connect to your Mongo DB instance|
+    |MONGODB_VECTOR_INDEX|Yes||The name of your Mongo DB vector index|
+    |MONGODB_DATABASE_NAME|Yes||The name of your Mongo DB database|
+    |MONGODB_CONTAINER_NAME|Yes||The name of your Mongo DB container|
+    |MONGODB_TOP_K|No|5|The number of documents to retrieve when querying your search index.|
+    |MONGODB_ENABLE_IN_DOMAIN|No|True|Limits responses to only queries relating to your data.|
+    |MONGODB_STRICTNESS|No|3|Integer from 1 to 5 specifying the strictness for the model limiting responses to your data.|
+    |MONGODB_CONTENT_COLUMNS|No||List of fields in your search index that contains the text content of your documents to use when formulating a bot response. Represent these as a string joined with "|", e.g. `"product_description|product_manual"`|
+    |MONGODB_FILENAME_COLUMN|No|| Field from your search index that gives a unique identifier of the source of your data to display in the UI.|
+    |MONGODB_TITLE_COLUMN|No||Field from your search index that gives a relevant title or header for your data content to display in the UI.|
+    |MONGODB_URL_COLUMN|No||Field from your search index that contains a URL for the document, e.g. an Azure Blob Storage URI. This value is not currently used.|
+    |MONGODB_VECTOR_COLUMNS|No||List of fields in your search index that contain vector embeddings of your documents to use when formulating a bot response. Represent these as a string joined with "|", e.g. `"product_description|product_manual"`|
+
+    MongoDB uses vector search by default, so ensure these settings are configured on your app:
+    - `AZURE_OPENAI_EMBEDDING_NAME`: the name of your Ada (text-embedding-ada-002) model deployment on your Azure OpenAI resource.
+    - `MONGODB_VECTOR_COLUMNS`: the vector columns in your index to use when searching. Join them with `|` like `contentVector|titleVector`.
+
 #### Chat with your data using Azure SQL Server (Private Preview)
 
 1. Update the `AZURE_OPENAI_*` environment variables as described in the [basic chat experience](#basic-chat-experience) above. 

backend/settings.py

@@ -625,7 +625,8 @@ class _AzureSqlServerSettings(BaseSettings, DatasourcePayloadConstructor):
     model_config = SettingsConfigDict(
         env_prefix="AZURE_SQL_SERVER_",
         env_file=DOTENV_PATH,
-        extra="ignore"
+        extra="ignore",
+        env_ignore_empty=True
     )
     _type: Literal["azure_sql_server"] = PrivateAttr(default="azure_sql_server")
 
@@ -658,7 +659,84 @@ def construct_payload_configuration(
             "parameters": parameters
         }
 
+
+class _MongoDbSettings(BaseSettings, DatasourcePayloadConstructor):
+    model_config = SettingsConfigDict(
+        env_prefix="MONGODB_",
+        env_file=DOTENV_PATH,
+        extra="ignore",
+        env_ignore_empty=True
+    )
+    _type: Literal["mongo_db"] = PrivateAttr(default="mongo_db")
+
+    endpoint: str
+    username: str = Field(exclude=True)
+    password: str = Field(exclude=True)
+    database_name: str
+    collection_name: str
+    app_name: str
+    index_name: str
+    query_type: Literal["vector"] = "vector"
+    top_k: int = Field(default=5, serialization_alias="top_n_documents")
+    strictness: int = 3
+    enable_in_domain: bool = Field(default=True, serialization_alias="in_scope")
+    content_columns: Optional[List[str]] = Field(default=None, exclude=True)
+    vector_columns: Optional[List[str]] = Field(default=None, exclude=True)
+    title_column: Optional[str] = Field(default=None, exclude=True)
+    url_column: Optional[str] = Field(default=None, exclude=True)
+    filename_column: Optional[str] = Field(default=None, exclude=True)
+
+
+    # Constructed fields
+    authentication: Optional[dict] = None
+    embedding_dependency: Optional[dict] = None
+    fields_mapping: Optional[dict] = None
+
+    @field_validator('content_columns', 'vector_columns', mode="before")
+    @classmethod
+    def split_columns(cls, comma_separated_string: str) -> List[str]:
+        if isinstance(comma_separated_string, str) and len(comma_separated_string) > 0:
+            return parse_multi_columns(comma_separated_string)
+
+        return None
+
+    @model_validator(mode="after")
+    def set_fields_mapping(self) -> Self:
+        self.fields_mapping = {
+            "content_fields": self.content_columns,
+            "title_field": self.title_column,
+            "url_field": self.url_column,
+            "filepath_field": self.filename_column,
+            "vector_fields": self.vector_columns
+        }
+        return self
+
+    @model_validator(mode="after")
+    def construct_authentication(self) -> Self:
+        self.authentication = {
+            "type": "username_and_password",
+            "username": self.username,
+            "password": self.password
+        }
+        return self
 
+    def construct_payload_configuration(
+        self,
+        *args,
+        **kwargs
+    ):
+        self.embedding_dependency = \
+            self._settings.azure_openai.extract_embedding_dependency()
+
+        parameters = self.model_dump(exclude_none=True, by_alias=True)
+        parameters.update(self._settings.search.model_dump(exclude_none=True, by_alias=True))
+
+        return {
+            "type": self._type,
+            "parameters": parameters
+        }
+
+
 class _BaseSettings(BaseSettings):
     model_config = SettingsConfigDict(
         env_file=DOTENV_PATH,
@@ -729,15 +807,20 @@ def set_datasource_settings(self) -> Self:
             elif self.base_settings.datasource_type == "AzureSqlServer":
                 self.datasource = _AzureSqlServerSettings(settings=self, _env_file=DOTENV_PATH)
                 logging.debug("Using SQL Server")
+
+            elif self.base_settings.datasource_type == "MongoDB":
+                self.datasource = _MongoDbSettings(settings=self, _env_file=DOTENV_PATH)
+                logging.debug("Using Mongo DB")
 
             else:
                 self.datasource = None
                 logging.warning("No datasource configuration found in the environment -- calls will be made to Azure OpenAI without grounding data.")
 
             return self
 
-        except ValidationError:
+        except ValidationError as e:
             logging.warning("No datasource configuration found in the environment -- calls will be made to Azure OpenAI without grounding data.")
+            logging.warning(e.errors())
 
 
 app_settings = _AppSettings()