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LadybugAdapter

cognee_lib::graph

Struct LadybugAdapter 

Source 
pub struct LadybugAdapter { /* private fields */ }
Expand description

Ladybug graph database adapter.

This adapter provides a complete implementation of GraphDBTrait using the Ladybug (lbug) embedded graph database.

Parity note: Python documents the default file-backed deployment model as a single owning process for SQLite/Ladybug/LanceDB access (for example via the API server --api-url mode and single-worker session locks), while also supporting an opt-in Redis-backed shared Ladybug lock for multi-process coordination. Rust currently matches the default single-process model: overlapping writes are serialized in-process, and cross-process locking is intentionally out of scope.

§Schema

The adapter creates the following schema:

CREATE NODE TABLE Node (
    id STRING PRIMARY KEY,
    name STRING,
    type STRING,
    created_at TIMESTAMP,
    updated_at TIMESTAMP,
    properties STRING  -- JSON-encoded additional properties
)

CREATE REL TABLE EDGE (
    FROM Node TO Node,
    relationship_name STRING,
    created_at TIMESTAMP,
    updated_at TIMESTAMP,
    properties STRING  -- JSON-encoded edge properties
)

§Example

ⓘ
use cognee_graph::{LadybugAdapter, GraphDBTrait};
use cognee_models::Entity;

let adapter = LadybugAdapter::new("./my_graph").await?;
adapter.initialize().await?;

// Add nodes
let entity = Entity::new("Alice", entity_type, Some("dataset-1"));
adapter.add_node(&entity).await?;

Implementations§

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impl LadybugAdapter

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pub const NODE_QUERY_COLUMN_COUNT: usize = 4

Number of columns in node query: id, name, type, properties

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pub const EDGE_QUERY_COLUMN_COUNT: usize = 4

Number of columns in edge query: source_id, target_id, relationship_name, properties

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pub async fn new(db_path: &str) -> Result<LadybugAdapter, GraphDBError>

Create a new Ladybug adapter.

§Arguments
  • db_path - Path to the database directory
§Returns

A new LadybugAdapter instance

§Errors

Returns GraphDBError::InitializationError if database creation fails

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pub fn db_path(&self) -> &str

Get the database path.

Trait Implementations§

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impl GraphDBTrait for LadybugAdapter

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fn initialize<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, LadybugAdapter: 'async_trait,

Initialize the database schema. Read more
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fn is_empty<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<bool, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, LadybugAdapter: 'async_trait,

Check if the database is empty (no nodes).
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fn query<'life0, 'life1, 'async_trait>( &'life0 self, query: &'life1 str, params: Option<HashMap<Cow<'static, str>, Value>>, ) -> Pin<Box<dyn Future<Output = Result<Vec<Vec<Value>>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Execute a raw database query. Read more
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fn delete_graph<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, LadybugAdapter: 'async_trait,

Delete the entire graph (all nodes and edges).
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fn has_node<'life0, 'life1, 'async_trait>( &'life0 self, node_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<bool, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Check if a node exists by ID.
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fn add_node_raw<'life0, 'async_trait>( &'life0 self, node: Value, ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, LadybugAdapter: 'async_trait,

Add a single node (type-erased). Takes a pre-serialized JSON value. Prefer GraphDBTraitExt::add_node for typed access.
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fn add_nodes_raw<'life0, 'async_trait>( &'life0 self, nodes: Vec<Value>, ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, LadybugAdapter: 'async_trait,

Add multiple nodes (type-erased). Takes pre-serialized JSON values. Prefer GraphDBTraitExt::add_nodes for typed access.
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fn delete_node<'life0, 'life1, 'async_trait>( &'life0 self, node_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Delete a node by ID.
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fn delete_nodes<'life0, 'life1, 'async_trait>( &'life0 self, node_ids: &'life1 [String], ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Delete multiple nodes by IDs.
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fn get_node<'life0, 'life1, 'async_trait>( &'life0 self, node_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<HashMap<Cow<'static, str>, Value>>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Get a single node by ID. Read more
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fn get_nodes<'life0, 'life1, 'async_trait>( &'life0 self, node_ids: &'life1 [String], ) -> Pin<Box<dyn Future<Output = Result<Vec<HashMap<Cow<'static, str>, Value>>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Get multiple nodes by IDs.
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fn has_edge<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, source_id: &'life1 str, target_id: &'life2 str, relationship_name: &'life3 str, ) -> Pin<Box<dyn Future<Output = Result<bool, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait, LadybugAdapter: 'async_trait,

Check if an edge exists between two nodes. Read more
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fn has_edges<'life0, 'life1, 'async_trait>( &'life0 self, edges: &'life1 [(String, String, String, HashMap<Cow<'static, str>, Value>)], ) -> Pin<Box<dyn Future<Output = Result<Vec<(String, String, String, HashMap<Cow<'static, str>, Value>)>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Check which edges exist from a list. Read more
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fn add_edge<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, source_id: &'life1 str, target_id: &'life2 str, relationship_name: &'life3 str, properties: Option<HashMap<Cow<'static, str>, Value>>, ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait, LadybugAdapter: 'async_trait,

Add a single edge between two nodes. Read more
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fn add_edges<'life0, 'life1, 'async_trait>( &'life0 self, edges: &'life1 [(String, String, String, HashMap<Cow<'static, str>, Value>)], ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Add multiple edges in a batch operation. Read more
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fn get_edges<'life0, 'life1, 'async_trait>( &'life0 self, node_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Vec<(String, String, String, HashMap<Cow<'static, str>, Value>)>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Get all edges connected to a node. Read more
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fn get_neighbors<'life0, 'life1, 'async_trait>( &'life0 self, node_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Vec<HashMap<Cow<'static, str>, Value>>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Get all neighboring nodes (directly connected).
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fn get_connections<'life0, 'life1, 'async_trait>( &'life0 self, node_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Vec<(HashMap<Cow<'static, str>, Value>, HashMap<Cow<'static, str>, Value>, HashMap<Cow<'static, str>, Value>)>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Get all connections (nodes + edges) for a node. Read more
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fn get_graph_data<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<(Vec<(String, HashMap<Cow<'static, str>, Value>)>, Vec<(String, String, String, HashMap<Cow<'static, str>, Value>)>), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, LadybugAdapter: 'async_trait,

Get all nodes and edges in the graph. Read more
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fn get_graph_metrics<'life0, 'async_trait>( &'life0 self, _include_optional: bool, ) -> Pin<Box<dyn Future<Output = Result<HashMap<Cow<'static, str>, Value>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, LadybugAdapter: 'async_trait,

Get graph metrics and statistics. Read more
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fn get_filtered_graph_data<'life0, 'life1, 'async_trait>( &'life0 self, attribute_filters: &'life1 HashMap<Cow<'static, str>, Vec<Value>>, ) -> Pin<Box<dyn Future<Output = Result<(Vec<(String, HashMap<Cow<'static, str>, Value>)>, Vec<(String, String, String, HashMap<Cow<'static, str>, Value>)>), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Get a filtered subgraph based on attribute filters. Read more
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fn get_nodeset_subgraph<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, node_type: &'life1 str, node_names: &'life2 [String], node_name_filter_operator: &'life3 str, ) -> Pin<Box<dyn Future<Output = Result<(Vec<(String, HashMap<Cow<'static, str>, Value>)>, Vec<(String, String, String, HashMap<Cow<'static, str>, Value>)>), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait, LadybugAdapter: 'async_trait,

Get subgraph for a specific set of nodes. Read more
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fn update_node_property<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, node_id: &'life1 str, key: &'life2 str, value: Value, ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, LadybugAdapter: 'async_trait,

Update a single property on a node. Read more
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fn update_edge_property<'life0, 'life1, 'life2, 'life3, 'life4, 'async_trait>( &'life0 self, source_id: &'life1 str, target_id: &'life2 str, relationship_name: &'life3 str, key: &'life4 str, value: Value, ) -> Pin<Box<dyn Future<Output = Result<(), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait, 'life4: 'async_trait, LadybugAdapter: 'async_trait,

Update a single property on an edge. Read more
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fn get_node_feedback_weights<'life0, 'life1, 'async_trait>( &'life0 self, node_ids: &'life1 [String], ) -> Pin<Box<dyn Future<Output = Result<HashMap<String, f64>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Batch-fetch feedback_weight values for the given node IDs. Read more
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fn set_node_feedback_weights<'life0, 'life1, 'async_trait>( &'life0 self, updates: &'life1 HashMap<String, f64>, ) -> Pin<Box<dyn Future<Output = Result<HashMap<String, bool>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Batch-write feedback_weight values on the given nodes. Read more
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fn get_edge_feedback_weights<'life0, 'life1, 'async_trait>( &'life0 self, edge_keys: &'life1 [(String, String, String)], ) -> Pin<Box<dyn Future<Output = Result<HashMap<(String, String, String), f64>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Batch-fetch feedback_weight values for the given edges. Read more
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fn set_edge_feedback_weights<'life0, 'life1, 'async_trait>( &'life0 self, updates: &'life1 HashMap<(String, String, String), f64>, ) -> Pin<Box<dyn Future<Output = Result<HashMap<(String, String, String), bool>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, LadybugAdapter: 'async_trait,

Batch-write feedback_weight values on the given edges. Read more
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fn get_degree_one_nodes<'life0, 'life1, 'async_trait>( &'life0 self, node_type: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Vec<(String, HashMap<Cow<'static, str>, Value>)>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Find nodes of the given type that have exactly one edge (any direction). Read more
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fn get_all_relationship_names<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<HashSet<String>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Return the set of all unique relationship names from edges in the graph. Read more
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fn get_zero_degree_edge_type_nodes<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<Vec<(String, HashMap<Cow<'static, str>, Value>)>, GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Find EdgeType nodes in the graph that have zero edges (degree 0). Read more
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fn get_id_filtered_graph_data<'life0, 'life1, 'async_trait>( &'life0 self, node_ids: &'life1 [String], ) -> Pin<Box<dyn Future<Output = Result<(Vec<(String, HashMap<Cow<'static, str>, Value>)>, Vec<(String, String, String, HashMap<Cow<'static, str>, Value>)>), GraphDBError>> + Send + 'async_trait>>
where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Retrieve a subgraph containing only the specified nodes and edges between them. Read more

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where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, T: 'async_trait + Serialize + Sync, Self: Sync + 'async_trait,

Add multiple nodes in a batch operation.
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> ToOwned for T

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type Owned = T

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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U, C> TryFromWithContext<U, C> for T
where U: IntoWithContext<T, C>,

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type Error = Infallible

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fn try_from_with( value: U, context: &C, ) -> Result<T, <T as TryFromWithContext<U, C>>::Error>

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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T, U, C> TryIntoWithContext<U, C> for T
where U: TryFromWithContext<T, C>,

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type Error = <U as TryFromWithContext<T, C>>::Error

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fn try_into_with( self, context: &C, ) -> Result<U, <T as TryIntoWithContext<U, C>>::Error>

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> Value for T
where T: Any + Send + Sync + 'static,

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fn as_any(&self) -> &(dyn Any + 'static)

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

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fn into_any(self: Box<T>) -> Box<dyn Any>

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impl<T> WithContext for T
where T: ?Sized,

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fn with<C>(&self, context: C) -> Contextual<&T, C>

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fn into_with<C>(self, context: C) -> Contextual<T, C>
where T: Sized,

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more