Improve LLMs and Embedding models resources experience (#21)

* Fix inconsistent default values
* Disallow LLM's empty name. Handle LLM creation error on UI

libs/ktem/ktem/llms/manager.py

@@ -140,8 +140,17 @@ class LLMManager:
 
     def add(self, name: str, spec: dict, default: bool):
         """Add a new model to the pool"""
+        if not name:
+            raise ValueError("Name must not be empty")
+
         try:
             with Session(engine) as session:
+
+                if default:
+                    # turn all models to non-default
+                    session.query(LLMTable).update({"default": False})
+                    session.commit()
+
                 item = LLMTable(name=name, spec=spec, default=default)
                 session.add(item)
                 session.commit()
@@ -164,6 +173,9 @@ class LLMManager:
 
     def update(self, name: str, spec: dict, default: bool):
         """Update a model in the pool"""
+        if not name:
+            raise ValueError("Name must not be empty")
+
         try:
             with Session(engine) as session:
 

libs/ktem/ktem/llms/ui.py

@@ -140,7 +140,7 @@ class LLMManagement(BasePage):
             self.create_llm,
             inputs=[self.name, self.llm_choices, self.spec, self.default],
             outputs=None,
-        ).then(self.list_llms, inputs=None, outputs=[self.llm_list],).then(
+        ).success(self.list_llms, inputs=None, outputs=[self.llm_list]).success(
             lambda: ("", None, "", False, self.spec_desc_default),
             outputs=[
                 self.name,
@@ -229,7 +229,7 @@ class LLMManagement(BasePage):
             llms.add(name, spec=spec, default=default)
             gr.Info(f"LLM {name} created successfully")
         except Exception as e:
-            gr.Error(f"Failed to create LLM {name}: {e}")
+            raise gr.Error(f"Failed to create LLM {name}: {e}")
 
     def list_llms(self):
         """List the LLMs"""