921fe82771
- database.ts 导出db常量替代getDb()函数 - env.ts JWT_SECRET/ES_URL/NEO4J_URL改optional加DEV_MODE - neo4j.ts driver惰性创建+try/catch+connectionTimeout:3000 - health/lifecycle改用Drizzle原生查询 - textbooks.schema修复integer到int+导出NewTextbook类型 - 新建chapters/knowledge-points/questions三模块CRUD - knowledge-points含Neo4j前置依赖图非阻塞查询 - content-init.sql创建4张表 端到端验证: textbooks/chapters/knowledge-points/questions全CRUD通过
39 lines
1.1 KiB
TypeScript
39 lines
1.1 KiB
TypeScript
import neo4j from "neo4j-driver";
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import type { Driver, Session } from "neo4j-driver";
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import { env } from "./env.js";
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// Neo4j driver 创建为惰性初始化：未配置 NEO4J_URL / NEO4J_PASSWORD 时
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// driver 保持 null，服务仍可正常启动。所有依赖 Neo4j 的查询在
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// driver 为 null 时返回空结果或抛出可控错误，不会阻塞主流程。
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let driver: Driver | null = null;
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try {
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if (env.NEO4J_URL && env.NEO4J_PASSWORD) {
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driver = neo4j.driver(
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env.NEO4J_URL,
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neo4j.auth.basic("neo4j", env.NEO4J_PASSWORD),
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// 连接超时 3s：Neo4j 不可用时快速失败，避免拖慢 HTTP 响应
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{ connectionTimeout: 3000, maxConnectionLifetime: 60_000 },
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);
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}
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} catch (err) {
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console.warn(
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"Neo4j driver init failed, running without Neo4j:",
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err instanceof Error ? err.message : String(err),
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);
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driver = null;
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}
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export function getNeo4jSession(): Session | null {
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if (!driver) {
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return null;
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}
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return driver.session();
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}
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export async function closeNeo4j(): Promise<void> {
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if (driver) {
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await driver.close();
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}
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}
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