How can I resolve the Prompt must include a context variable error in Langchain JS while creating a retrieval chain

Question

With the help of Python programming, can you tell me how I can resolve the 'Prompt must include a "context" variable' error in Langchain JS while creating a retrieval chain?

Answer 1

You can resolve the Prompt, which must include a context variable error in Langchain JS while creating a retrieval chain by referring to the code below:

In the above code, we are using the following approaches:

• Ensure the PromptTemplate includes the context in input variables and references {context} in the template.
• The retriever must provide relevant documents to populate the context.

Hence, by referring to the above, you can resolve the Prompt, which must include a context variable error in Langchain JS while creating a retrieval chain