mistralai[patch]: Remove default tool call value for translated messages

libs/langchain-mistralai/src/chat_models.ts

@@ -215,25 +215,27 @@ function convertMessagesToMistralMessages(
         .map((toolCall) => ({ ...toolCall, id: "null" }))
         .map(convertLangChainToolCallToOpenAI) as MistralAIToolCalls[];
     }
-    if (message.additional_kwargs.tool_calls === undefined) {
+    if (!message.additional_kwargs.tool_calls?.length) {
       return undefined;
     }
     const toolCalls: Omit<OpenAIToolCall, "index">[] =
       message.additional_kwargs.tool_calls;
-    return (
-      toolCalls?.map((toolCall) => ({
-        id: "null",
-        type: "function" as ToolType.function,
-        function: toolCall.function,
-      })) || []
-    );
+    return toolCalls?.map((toolCall) => ({
+      id: "null",
+      type: "function" as ToolType.function,
+      function: toolCall.function,
+    }));
   };
 
-  return messages.map((message) => ({
-    role: getRole(message._getType()),
-    content: getContent(message.content),
-    tool_calls: getTools(message),
-  }));
+  return messages.map((message) => {
+    const toolCalls = getTools(message);
+    const content = toolCalls === undefined ? getContent(message.content) : "";
+    return {
+      role: getRole(message._getType()),
+      content,
+      tool_calls: toolCalls,
+    };
+  });
 }
 
 function mistralAIResponseToChatMessage(
@@ -505,15 +507,23 @@ export class ChatMistralAI<
     const client = new MistralClient(this.apiKey, this.endpoint);
 
     return this.caller.call(async () => {
-      let res:
-        | ChatCompletionResponse
-        | AsyncGenerator<ChatCompletionResponseChunk>;
-      if (streaming) {
-        res = client.chatStream(input);
-      } else {
-        res = await client.chat(input);
+      try {
+        let res:
+          | ChatCompletionResponse
+          | AsyncGenerator<ChatCompletionResponseChunk>;
+        if (streaming) {
+          res = client.chatStream(input);
+        } else {
+          res = await client.chat(input);
+        }
+        return res;
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      } catch (e: any) {
+        if (e.message?.includes("status: 400")) {
+          e.status = 400;
+        }
+        throw e;
       }
-      return res;
     });
   }