From 3d62957fed68a77e0d3ce0335a4f714d0a673b51 Mon Sep 17 00:00:00 2001
From: lgh <625458956@qq.com>
Date: Sat, 21 Feb 2026 01:40:13 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E5=A4=84=E7=90=86=E6=97=A0pgvector?=
 =?UTF-8?q?=E6=89=A9=E5=B1=95=E7=9A=84PostgreSQL?=
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---
 backend/app/models.py | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/backend/app/models.py b/backend/app/models.py
index dbdbf09..c33af44 100644
--- a/backend/app/models.py
+++ b/backend/app/models.py
@@ -4,14 +4,18 @@ import uuid
 from datetime import datetime
 from .database import Base
 
-# Compatibility layer for SQLite
+# Compatibility layer for SQLite and PostgreSQL without pgvector
 try:
     from sqlalchemy.dialects.postgresql import UUID, ARRAY
-    from pgvector.sqlalchemy import Vector
-    # Check if we are using SQLite
     import os
     if "sqlite" in os.getenv("DATABASE_URL", ""):
         raise ImportError("Using SQLite")
+    # Try to import pgvector, if fails use JSON
+    try:
+        from pgvector.sqlalchemy import Vector
+    except ImportError:
+        # No pgvector, use JSON instead
+        Vector = JSON
 except ImportError:
     from sqlalchemy.types import TypeDecorator, CHAR
     import json
@@ -38,7 +42,6 @@ except ImportError:
             if value is None: return None
             return json.loads(value)
 
-    # Use JSON for ARRAY in SQLite
     ARRAY = JSON
 
 class ContextNode(Base):