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60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
from cognee.shared.data_models import KnowledgeGraph
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from cognee.modules.chunking.models.DocumentChunk import DocumentChunk
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from cognee.modules.engine.models import Entity, EntityType
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def extract_relationships(
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document_chunk: DocumentChunk, graph: KnowledgeGraph, cache: dict | None = None
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):
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if cache is None:
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cache = {}
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relationships = []
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for edge in graph.edges:
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edge_id = f"{edge.source_node_id}_{edge.relationship_name}_{edge.target_node_id}"
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if edge_id not in cache:
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relationship = (
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Entity.id_for(edge.source_node_id),
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Entity.id_for(edge.target_node_id),
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edge.relationship_name,
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)
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cache[edge_id] = relationship
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else:
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relationship = cache[edge_id]
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relationships.append(relationship)
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for node in graph.nodes:
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node_id = Entity.id_for(node.id)
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type_node_id = EntityType.id_for(node.type)
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type_edge_id = f"{str(node_id)}_is_a_{str(type_node_id)}"
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if type_edge_id not in cache:
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relationship = (
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node_id,
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type_node_id,
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"is_a",
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)
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cache[type_edge_id] = relationship
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else:
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relationship = cache[type_edge_id]
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relationships.append(relationship)
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chunk_edge_id = f"{str(document_chunk.id)}_contains_{str(node_id)}"
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if chunk_edge_id not in cache:
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relationship = (
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document_chunk.id,
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node_id,
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"contains",
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)
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cache[chunk_edge_id] = relationship
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else:
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relationship = cache[chunk_edge_id]
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relationships.append(relationship)
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return relationships
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