server : fix --jinja when there's no tools or schema (typo was forcing JSON) (#11531)

Author: ochafik

examples/server/tests/unit/test_chat_completion.py

@@ -14,11 +14,10 @@ def create_server():
     "model,system_prompt,user_prompt,max_tokens,re_content,n_prompt,n_predicted,finish_reason,jinja,chat_template",
     [
         (None, "Book", "What is the best book", 8, "(Suddenly)+|\\{ \" Sarax.", 77, 8, "length", False, None),
+        (None, "Book", "What is the best book", 8, "(Suddenly)+|\\{ \" Sarax.", 77, 8, "length", True, None),
+        (None, "Book", "What is the best book", 8, "^ blue", 23, 8, "length", True, "This is not a chat template, it is"),
         ("codellama70b", "You are a coding assistant.", "Write the fibonacci function in c++.", 128, "(Aside|she|felter|alonger)+", 104, 64, "length", False, None),
-        # TODO: fix testing of non-tool jinja mode
-        # (None, "Book", "What is the best book", 8, "(Suddenly)+|\\{ \" Sarax.", 77, 8, "length", True, None),
-        # (None, "Book", "What is the best book", 8, "I want to play with", 23, 8, "length", True, "This is not a chat template, it is"),
-        # ("codellama70b", "You are a coding assistant.", "Write the fibonacci function in c++.", 128, "(Aside|she|felter|alonger)+", 104, 64, "length", True, None),
+        ("codellama70b", "You are a coding assistant.", "Write the fibonacci function in c++.", 128, "(Aside|she|felter|alonger)+", 104, 64, "length", True, None),
     ]
 )
 def test_chat_completion(model, system_prompt, user_prompt, max_tokens, re_content, n_prompt, n_predicted, finish_reason, jinja, chat_template):

examples/server/utils.hpp

@@ -642,7 +642,7 @@ static json oaicompat_completion_params_parse(
         inputs.parallel_tool_calls = json_value(body, "parallel_tool_calls", false);
         inputs.stream = stream;
         // TODO: support mixing schema w/ tools beyond generic format.
-        inputs.json_schema = json_value(llama_params, "json_schema", json::object());
+        inputs.json_schema = json_value(llama_params, "json_schema", json());
         auto chat_params = common_chat_params_init(tmpl, inputs);
 
         llama_params["chat_format"] = static_cast<int>(chat_params.format);