Module rtdb_adapter 

Real-Time Database Adapter

Trait and types for pluggable real-time database backends that store JSON documents using hierarchical path-based access (e.g., posts/abc123/comments/xyz789).

Read operations (query, get, subscribe) work directly on the adapter. Write operations (create, update, delete) require a transaction for atomicity.

Each adapter implementation provides its own constructor handling backend-specific initialization (database path, connection settings, etc.).

Structs

AggregateOptions

Aggregation options: group by a field and compute statistics.

DbStats

Database statistics.

LockInfo

Information about an active lock on a document path.

QueryFilter

Query filter for selecting documents.

QueryOptions

Options for querying documents (filter, sort, limit, offset).

SortField

Sort order for a field.

SubscriptionOptions

Options for subscribing to real-time changes.

Enums

AggregateOp

An aggregation operation to compute per group.

ChangeEvent

Real-time change event emitted when a document is created, updated, or deleted.

LockMode

Lock mode for document locking.

Traits

RtdbAdapter

Real-Time Database Adapter trait.

Transaction

Transaction for atomic write operations.

Functions

value_to_group_string

Convert a JSON value to a string key for aggregate group indexing.