ChatPromptTemplate
ChatPromptTemplate is a LangChain class that constructs a sequence of chat messages from reusable message templates and supplied input values.
MongoDB 8.0 in Action, Third Edition
ChatPromptTemplate is a LangChain component that constructs a formatted chat prompt from message templates and input values.
- How it is used
- Builds structured prompts inside a retrieval-augmented generation chain before the chat model processes retrieved context and a question.
- How deep it goes
- Explains its pipeline role and inputs but stops short of detailing template syntax or internal implementation.
- Examples
- Uses retrieved document content, source and page metadata, embeddings, and the question “What indexes does MongoDB support?” as concrete prompt inputs.
- What you can do after
- Apply it via LangChain to format retrieved context and user questions for a chat model in a RAG application.
Read how MongoDB 8.0 in Action, Third Edition explains ChatPromptTemplate →
Build AI-Enhanced Web Apps
ChatPromptTemplate is a LangChain class that constructs chat prompts from a reusable template and supplied values.
- How it is used
- Manages reusable, dynamically populated prompts within LangChain runnable chains before model invocation.
- How deep it goes
- Explains factory construction, placeholders, validation, reuse, and pipeline placement, but defers detailed ChatPromptTemplate internals.
- Examples
- Uses a vowel-counting chain and a {vowelCount} template, alongside a separate FewShotPromptTemplate example.
- What you can do after
- Build reusable JavaScript prompt stages and compose them with transformations, models, and output parsers.
Read how Build AI-Enhanced Web Apps explains ChatPromptTemplate →
Related concepts
- templateimplements · A template is a reusable structure with fixed elements and variable parts for creating or generating similar content, outputs, or artifacts.
- messageuses · A message is a discrete unit of information or data represented, processed, or exchanged in a communication context.
- promptequivalent to · An input, typically containing instructions or context, supplied to an artificial-intelligence model to guide or elicit its output.
- ChatOpenAIproduces · ChatOpenAI is a LangChain integration that provides an interface for invoking OpenAI chat-oriented language models.
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