feat: restore core admin modules and harden ai model fallback

backend-fastapi/ai_platform/services/agent_service.py

@@ -10,7 +10,7 @@ from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from ai_platform.models import (
-    Agent, AgentConversation, AgentMessage, AIWorkflow, LLMModel,
+    Agent, AgentConversation, AgentMessage, AIWorkflow, LLMModel, LLMProvider,
 )
 from .llm_service import LLMService
 
@@ -212,10 +212,14 @@ class AgentService:
 
         if agent.model_id:
             result = await self._db.execute(
-                select(LLMModel).where(
+                select(LLMModel)
+                .join(LLMProvider, LLMProvider.id == LLMModel.provider_id)
+                .where(
                     LLMModel.id == agent.model_id,
                     LLMModel.is_deleted == False,
                     LLMModel.is_active == True,
+                    LLMProvider.is_deleted == False,
+                    LLMProvider.is_active == True,
                 )
             )
             if result.scalar_one_or_none():
@@ -223,10 +227,13 @@ class AgentService:
 
         result = await self._db.execute(
             select(LLMModel)
+            .join(LLMProvider, LLMProvider.id == LLMModel.provider_id)
             .where(
                 LLMModel.is_deleted == False,
                 LLMModel.is_active == True,
                 LLMModel.model_type == "chat",
+                LLMProvider.is_deleted == False,
+                LLMProvider.is_active == True,
             )
             .order_by(LLMModel.sort.desc(), LLMModel.sys_create_datetime.desc())
         )

backend-fastapi/ai_platform/services/llm_service.py

@@ -44,14 +44,17 @@ class LLMService:
         if not self._db:
             raise ValueError("未找到可用的 chat 模型，请先在模型配置中启用一个模型")
 
-        from ai_platform.models import LLMModel
+        from ai_platform.models import LLMModel, LLMProvider
 
         result = await self._db.execute(
             select(LLMModel)
+            .join(LLMProvider, LLMProvider.id == LLMModel.provider_id)
             .where(
                 LLMModel.is_deleted == False,
                 LLMModel.is_active == True,
                 LLMModel.model_type == "chat",
+                LLMProvider.is_deleted == False,
+                LLMProvider.is_active == True,
             )
             .order_by(LLMModel.sort.desc(), LLMModel.sys_create_datetime.desc())
         )