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Describe the bug
The ChatPromptBuilder raises a misleading ValueError when receiving incorrect argument.
It complains that the prompt_source entry in not found, but it really needs the template argument
Error message
ValueError: Input prompt_source not found in component prompt_builder.
Expected behavior
ValueError: Input template not found in component prompt_builder.
Additional context
I noticed this while migrating from the DynamicChatPromptBuilder and forgot to change prompt_source to ´template`
To Reproduce
from haystack.components.builders import ChatPromptBuilder
from haystack.components.generators.chat import OpenAIChatGenerator
from haystack.dataclasses import ChatMessage
from haystack import Pipeline
from haystack.utils import Secret
# no parameter init, we don't use any runtime template variables
prompt_builder = ChatPromptBuilder()
llm = OpenAIChatGenerator(api_key=Secret.from_token("<your-api-key>"), model="gpt-3.5-turbo")
pipe = Pipeline()
pipe.add_component("prompt_builder", prompt_builder)
pipe.add_component("llm", llm)
pipe.connect("prompt_builder.prompt", "llm.messages")
location = "Berlin"
language = "English"
system_message = ChatMessage.from_system("You are an assistant giving information to tourists in {{language}}")
messages = [system_message, ChatMessage.from_user("Tell me about {{location}}")]
res = pipe.run(data={"prompt_builder": {"template_variables": {"location": location, "language": language},
"prompt_source": messages}})
print(res)
System:
OS: mac
GPU/CPU: M3 Pro
Haystack version (commit or version number): 2.2.3
The text was updated successfully, but these errors were encountered:
sebag90
changed the title
ChatPromptBuilder raises the wrong ValueError when receiving incorect argument
ChatPromptBuilder raises the misleading ValueError when receiving incorect argument
Jul 2, 2024
Describe the bug
The ChatPromptBuilder raises a misleading ValueError when receiving incorrect argument.
It complains that the
prompt_source
entry in not found, but it really needs thetemplate
argumentError message
ValueError: Input prompt_source not found in component prompt_builder.
Expected behavior
ValueError: Input template not found in component prompt_builder.
Additional context
I noticed this while migrating from the DynamicChatPromptBuilder and forgot to change
prompt_source
to ´template`To Reproduce
System:
The text was updated successfully, but these errors were encountered: