Fix @ in model name issue. (#3821)

### What problem does this PR solve?

#3814

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/db/services/dialog_service.py

@@ -120,7 +120,7 @@ def message_fit_in(msg, max_length=4000):
 
 
 def llm_id2llm_type(llm_id):
-    llm_id = llm_id.split("@")[0]
+    llm_id, _ = TenantLLMService.split_model_name_and_factory(llm_id)
     fnm = os.path.join(get_project_base_directory(), "conf")
     llm_factories = json.load(open(os.path.join(fnm, "llm_factories.json"), "r"))
     for llm_factory in llm_factories["factory_llm_infos"]:
@@ -132,11 +132,7 @@ def llm_id2llm_type(llm_id):
 def chat(dialog, messages, stream=True, **kwargs):
     assert messages[-1]["role"] == "user", "The last content of this conversation is not from user."
     st = timer()
-    tmp = dialog.llm_id.split("@")
-    fid = None
-    llm_id = tmp[0]
-    if len(tmp)>1: fid = tmp[1]
-
+    llm_id, fid = TenantLLMService.split_model_name_and_factory(dialog.llm_id)
     llm = LLMService.query(llm_name=llm_id) if not fid else LLMService.query(llm_name=llm_id, fid=fid)
     if not llm:
         llm = TenantLLMService.query(tenant_id=dialog.tenant_id, llm_name=llm_id) if not fid else \

api/db/services/llm_service.py

@@ -13,8 +13,12 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
+import json
 import logging
+import os
+
 from api.db.services.user_service import TenantService
+from api.utils.file_utils import get_project_base_directory
 from rag.llm import EmbeddingModel, CvModel, ChatModel, RerankModel, Seq2txtModel, TTSModel
 from api.db import LLMType
 from api.db.db_models import DB
@@ -36,11 +40,11 @@ class TenantLLMService(CommonService):
     @classmethod
     @DB.connection_context()
     def get_api_key(cls, tenant_id, model_name):
-        arr = model_name.split("@")
-        if len(arr) < 2:
-            objs = cls.query(tenant_id=tenant_id, llm_name=model_name)
+        mdlnm, fid = TenantLLMService.split_model_name_and_factory(model_name)
+        if not fid:
+            objs = cls.query(tenant_id=tenant_id, llm_name=mdlnm)
         else:
-            objs = cls.query(tenant_id=tenant_id, llm_name=arr[0], llm_factory=arr[1])
+            objs = cls.query(tenant_id=tenant_id, llm_name=mdlnm, llm_factory=fid)
         if not objs:
             return
         return objs[0]
@@ -61,6 +65,23 @@ class TenantLLMService(CommonService):
 
         return list(objs)
 
+    @staticmethod
+    def split_model_name_and_factory(model_name):
+        arr = model_name.split("@")
+        if len(arr) < 2:
+            return model_name, None
+        if len(arr) > 2:
+            return "@".join(arr[0:-1]), arr[-1]
+        try:
+            fact = json.load(open(os.path.join(get_project_base_directory(), "conf/llm_factories.json"), "r"))["factory_llm_infos"]
+            fact = set([f["name"] for f in fact])
+            if arr[-1] not in fact:
+                return model_name, None
+            return arr[0], arr[-1]
+        except Exception as e:
+            logging.exception(f"TenantLLMService.split_model_name_and_factory got exception: {e}")
+        return model_name, None
+
     @classmethod
     @DB.connection_context()
     def model_instance(cls, tenant_id, llm_type,
@@ -85,9 +106,7 @@ class TenantLLMService(CommonService):
             assert False, "LLM type error"
 
         model_config = cls.get_api_key(tenant_id, mdlnm)
-        tmp = mdlnm.split("@")
-        fid = None if len(tmp) < 2 else tmp[1]
-        mdlnm = tmp[0]
+        mdlnm, fid = TenantLLMService.split_model_name_and_factory(mdlnm)
         if model_config: model_config = model_config.to_dict()
         if not model_config:
             if llm_type in [LLMType.EMBEDDING, LLMType.RERANK]:
@@ -168,7 +187,7 @@ class TenantLLMService(CommonService):
         else:
             assert False, "LLM type error"
 
-        llm_name = mdlnm.split("@")[0] if "@" in mdlnm else mdlnm
+        llm_name, llm_factory = TenantLLMService.split_model_name_and_factory(mdlnm)
 
         num = 0
         try:
@@ -179,7 +198,7 @@ class TenantLLMService(CommonService):
                     .where(cls.model.tenant_id == tenant_id, cls.model.llm_factory == tenant_llm.llm_factory, cls.model.llm_name == llm_name)\
                     .execute()
             else:
-                llm_factory = mdlnm.split("@")[1] if "@" in mdlnm else mdlnm
+                if not llm_factory: llm_factory = mdlnm
                 num = cls.model.create(tenant_id=tenant_id, llm_factory=llm_factory, llm_name=llm_name, used_tokens=used_tokens)
         except Exception:
             logging.exception("TenantLLMService.increase_usage got exception")