rag_server/applications/utils/neo4j/models.py

from dataclasses import dataclass
from typing import List


@dataclass
class Document:
    doc_id: str
    dataset_id: int


@dataclass
class GraphChunk:
    milvus_id: int
    chunk_id: int
    doc_id: str
    topic: str
    domain: str
    text_type: int
    task_type: str


@dataclass
class ChunkRelations:
    entities: List[str]
    concepts: List[str]
    keywords: List[str]
    domain: str
    topic: str


QUERY = """
// 1) Document & GraphChunk
MERGE (d:Document {doc_id: $doc_id})
  ON CREATE SET d.dataset_id = $dataset_id
  SET d.dataset_id = $dataset_id

MERGE (gc:GraphChunk {milvus_id: $milvus_id})
  ON CREATE SET gc.chunk_id = $chunk_id, gc.doc_id = $doc_id
  SET gc.topic     = $topic,
      gc.domain    = $domain,
      gc.text_type = $text_type,
      gc.task_type = $task_type,
      gc.doc_id    = $doc_id,
      gc.display_name = $chunk_id + "--" + $doc_id

MERGE (gc)-[:BELONGS_TO]->(d)
MERGE (d)-[:HAS_CHUNK]->(gc)

// 2) 参数准备
WITH gc,
     COALESCE($entities,  []) AS entities,
     COALESCE($concepts,  []) AS concepts,
     COALESCE($keywords,  []) AS keywords,
     $domain_name AS domain_name,
     $topic_name  AS topic_name

// 3) Entities
UNWIND entities AS e_name
  WITH gc, e_name, concepts, keywords, domain_name, topic_name
  WITH gc, TRIM(e_name) AS e_name, concepts, keywords, domain_name, topic_name
  WHERE e_name <> ""
  MERGE (e:Entity {name: e_name})
  MERGE (gc)-[:HAS_ENTITY]->(e)

// 4) Concepts
WITH gc, concepts, keywords, domain_name, topic_name
UNWIND concepts AS c_name
  WITH gc, c_name, keywords, domain_name, topic_name
  WITH gc, TRIM(c_name) AS c_name, keywords, domain_name, topic_name
  WHERE c_name <> ""
  MERGE (co:Concept {name: c_name})
  MERGE (gc)-[:HAS_CONCEPT]->(co)

// 5) Keywords
WITH gc, keywords, domain_name, topic_name
UNWIND keywords AS k_name
  WITH gc, k_name, domain_name, topic_name
  WITH gc, TRIM(k_name) AS k_name, domain_name, topic_name
  WHERE k_name <> ""
  MERGE (k:Keyword {name: k_name})
  MERGE (gc)-[:HAS_KEYWORD]->(k)

// 6) Domain（条件执行，用 FOREACH 替代 CALL）
WITH gc, domain_name, topic_name
FOREACH (_ IN CASE WHEN domain_name IS NOT NULL AND TRIM(domain_name) <> "" THEN [1] ELSE [] END |
  MERGE (d_node:Domain {name: TRIM(domain_name)})
  MERGE (gc)-[:HAS_DOMAIN]->(d_node)
)

// 7) Topic（条件执行，用 FOREACH 替代 CALL）
WITH gc, topic_name
FOREACH (_ IN CASE WHEN topic_name IS NOT NULL AND TRIM(topic_name) <> "" THEN [1] ELSE [] END |
  MERGE (t:Topic {name: TRIM(topic_name)})
  MERGE (gc)-[:HAS_TOPIC]->(t)
)
"""