🔧 chore(base.py, constants.py, llms.py): add info field to TemplateField and OPENAI_API_BASE_INFO constant

The `info` field is added to the `TemplateField` class to provide additional information about the field. The `OPENAI_API_BASE_INFO` constant is added to the `constants.py` file to provide information about the base URL of the OpenAI API and how it can be changed to use other APIs like Prem and LocalAI. The `info` field is set to `OPENAI_API_BASE_INFO` for the `openai_api_base` field in the `LLMFrontendNode` class in `llms.py`.

src/backend/langflow/template/field/base.py

@@ -21,6 +21,7 @@ class TemplateFieldCreator(BaseModel, ABC):
     name: str = ""
     display_name: Optional[str] = None
     advanced: bool = False
+    info: Optional[str] = ""
 
     def to_dict(self):
         result = self.dict()

src/backend/langflow/template/frontend_node/constants.py

@@ -32,3 +32,13 @@ You are a good listener and you can talk about anything.
 HUMAN_PROMPT = "{input}"
 
 QA_CHAIN_TYPES = ["stuff", "map_reduce", "map_rerank", "refine"]
+
+
+# This variable is used to tell the user
+# that it can be changed to use other APIs
+# like Prem and LocalAI
+OPENAI_API_BASE_INFO = """
+The base URL of the OpenAI API. Defaults to https://api.openai.com/v1.
+
+You can change this to use other APIs like Prem and LocalAI.
+"""

src/backend/langflow/template/frontend_node/llms.py

@@ -2,6 +2,7 @@ from typing import Optional
 
 from langflow.template.field.base import TemplateField
 from langflow.template.frontend_node.base import FrontendNode
+from langflow.template.frontend_node.constants import OPENAI_API_BASE_INFO
 
 
 class LLMFrontendNode(FrontendNode):
@@ -15,6 +16,9 @@ class LLMFrontendNode(FrontendNode):
         if "key" not in field.name.lower() and "token" not in field.name.lower():
             field.password = False
 
+        if field.name == "openai_api_base":
+            field.info = OPENAI_API_BASE_INFO
+
     @staticmethod
     def format_azure_field(field: TemplateField):
         if field.name == "model_name":