Configuration

Config section: nosql:
Env prefix: LEX_NOSQL__

NoSQLConfig (Top Level)

Key	Type	Default	Env Variable	Description
`enabled`	`bool`	`true`	`LEX_NOSQL__ENABLED`	Enable NoSQL subsystem
`driver`	`str`	`"mongodb"`	`LEX_NOSQL__DRIVER`	NoSQL driver name (`mongodb`, `firestore`)
`mongodb`	`MongoDBConfig`	defaults	`LEX_NOSQL__MONGODB__*`	MongoDB connection settings
`firestore`	`FirestoreConfig \| None`	`null`	`LEX_NOSQL__FIRESTORE__*`	Firestore settings (used when `driver="firestore"`)
`backends`	`list[NamedNoSQLConfig]`	`[]`	`LEX_NOSQL__BACKENDS__*`	Named multi-backend entries

MongoDBConfig

Key	Type	Default	Env Variable	Description
`uri`	`str`	`"mongodb://localhost:27017"`	`LEX_NOSQL__MONGODB__URI`	Connection URI
`database`	`str`	`"lexigram"`	`LEX_NOSQL__MONGODB__DATABASE`	Database name
`max_pool_size`	`int`	`100`	`LEX_NOSQL__MONGODB__MAX_POOL_SIZE`	Max connection pool size
`min_pool_size`	`int`	`10`	`LEX_NOSQL__MONGODB__MIN_POOL_SIZE`	Min connection pool size
`server_selection_timeout_ms`	`int`	`5000`	`LEX_NOSQL__MONGODB__SERVER_SELECTION_TIMEOUT_MS`	Server selection timeout (ms)
`connect_timeout_ms`	`int`	`10000`	`LEX_NOSQL__MONGODB__CONNECT_TIMEOUT_MS`	Connection timeout (ms)
`socket_timeout_ms`	`int`	`30000`	`LEX_NOSQL__MONGODB__SOCKET_TIMEOUT_MS`	Socket timeout (ms)
`retry_writes`	`bool`	`true`	`LEX_NOSQL__MONGODB__RETRY_WRITES`	Enable write retries
`retry_reads`	`bool`	`true`	`LEX_NOSQL__MONGODB__RETRY_READS`	Enable read retries
`read_preference`	`str`	`"primaryPreferred"`	`LEX_NOSQL__MONGODB__READ_PREFERENCE`	Read preference mode
`write_concern_w`	`str \| int`	`"majority"`	`LEX_NOSQL__MONGODB__WRITE_CONCERN_W`	Write concern level
`auth_source`	`str`	`"admin"`	`LEX_NOSQL__MONGODB__AUTH_SOURCE`	Authentication database

FirestoreConfig

Key	Type	Default	Env Variable	Description
`project_id`	`str`	(required)	`LEX_NOSQL__FIRESTORE__PROJECT_ID`	Google Cloud project ID
`credentials_json`	`str \| None`	`null`	`LEX_NOSQL__FIRESTORE__CREDENTIALS_JSON`	Service account JSON key (path or raw)
`database_id`	`str`	`"(default)"`	`LEX_NOSQL__FIRESTORE__DATABASE_ID`	Firestore database ID

DynamoDBConfig

Key	Type	Default	Env Variable	Description
`table_name`	`str`	`"lexigram"`	—	Default table name
`region`	`str`	`"us-east-1"`	—	AWS region
`access_key`	`str \| None`	`null`	—	AWS access key ID
`secret_key`	`str \| None`	`null`	—	AWS secret access key
`endpoint_url`	`str \| None`	`null`	—	Custom endpoint (e.g., `http://localhost:8000`)
`pk_field`	`str`	`"_id"`	—	Partition key attribute name

DynamoDBConfig has no environment variable overrides — NoSQLConfig wires only Mongo and Firestore backends. Configure DynamoDB programmatically via DynamoDBConfig(...).

Named backends follow the same env pattern with an index: LEX_NOSQL__BACKENDS__0__NAME, LEX_NOSQL__BACKENDS__0__DRIVER, etc.

Minimal YAML Example

nosql:
  driver: mongodb
  mongodb:
    uri: mongodb://localhost:27017
    database: myapp

Production YAML Example

nosql:
  driver: mongodb
  mongodb:
    uri: mongodb://admin:${MONGODB_PASSWORD}@cluster0.example.mongodb.net
    database: myapp
    max_pool_size: 50
    retry_writes: true
    write_concern_w: majority

Multi-Backend Example

nosql:
  backends:
    - name: primary
      driver: mongodb
      primary: true
      mongodb:
        uri: mongodb://primary:27017
        database: app
    - name: analytics
      driver: mongodb
      mongodb:
        uri: mongodb://analytics:27017
        database: analytics

Environment Variable Override

export LEX_NOSQL__MONGODB__URI="mongodb://prod-cluster:27017"
export LEX_NOSQL__MONGODB__DATABASE="production_db"
export LEX_NOSQL__DRIVER="mongodb"