fix: differentiate prompts fields based on function_calling_type (#5880)

api/core/model_runtime/model_providers/openai_api_compatible/llm/llm.py

             message = cast(AssistantPromptMessage, message)
             message_dict = {"role": "assistant", "content": message.content}
             if message.tool_calls:
-                # message_dict["tool_calls"] = [helper.dump_model(PromptMessageFunction(function=tool_call)) for tool_call
-                #                               in
-                #                               message.tool_calls]
-
-                function_call = message.tool_calls[0]
-                message_dict["function_call"] = {
-                    "name": function_call.function.name,
-                    "arguments": function_call.function.arguments,
-                }
+                function_calling_type = credentials.get('function_calling_type', 'no_call')
+                if function_calling_type == 'tool_call':
+                    message_dict["tool_calls"] = [tool_call.dict() for tool_call in
+                                                message.tool_calls]
+                elif function_calling_type == 'function_call':
+                    function_call = message.tool_calls[0]
+                    message_dict["function_call"] = {
+                        "name": function_call.function.name,
+                        "arguments": function_call.function.arguments,
+                    }
         elif isinstance(message, SystemPromptMessage):
             message = cast(SystemPromptMessage, message)
             message_dict = {"role": "system", "content": message.content}
         elif isinstance(message, ToolPromptMessage):
             message = cast(ToolPromptMessage, message)
-            # message_dict = {
-            #     "role": "tool",
-            #     "content": message.content,
-            #     "tool_call_id": message.tool_call_id
-            # }
-            message_dict = {
-                "role": "tool" if credentials and credentials.get('function_calling_type', 'no_call') == 'tool_call' else "function",
-                "content": message.content,
-                "name": message.tool_call_id
-            }
+            function_calling_type = credentials.get('function_calling_type', 'no_call')
+            if function_calling_type == 'tool_call':
+                message_dict = {
+                    "role": "tool",
+                    "content": message.content,
+                    "tool_call_id": message.tool_call_id
+                }
+            elif function_calling_type == 'function_call':
+                message_dict = {
+                    "role": "function",
+                    "content": message.content,
+                    "name": message.tool_call_id
+                }
         else:
             raise ValueError(f"Got unknown type {message}")