SimpleSequencialCahin questions

[Elindo586]

Can I add RetrievalAAChain and ConversationaChain to a SimpleSequentialChain?... and I would also want to add some LLMChain

Would look something kind of like this:

const chain1 = new ConversationChain({
  memory: new BufferMemory({ returnMessages: true, memoryKey: "history" }),
  prompt: chatPrompt,
  llm: chat,
});

const chain2 = new RetrievalQAChain({
  combineDocumentsChain: loadQAStuffChain(model),
  retriever: vectorStore.asRetriever(),
  returnSourceDocuments: true,
});

const overallChain = new SimpleSequentialChain({
  chains: [Chain1, Chain2, andthensomepromptstoo],
  verbose: true,
});

[dosubot[bot]]

🤖

Yes, you can add multiple types of chains such as RetrievalQAChain, ConversationChain, and LLMChain to a SimpleSequentialChain. The SimpleSequentialChain class in the langchainjs codebase does allow for the addition of multiple types of chains. However, it's important to note that each chain used in SimpleSequentialChain should have exactly one input and one output. This is validated in the _validateChains method of the SimpleSequentialChain class. If a chain does not meet these criteria, an error will be thrown.

Here is an example of how you can add multiple chains to a SimpleSequentialChain:

const chain1 = new RetrievalQAChain({
  combineDocumentsChain: loadQAStuffChain(model),
  retriever: vectorStore.asRetriever(),
  returnSourceDocuments: true,
});

const chain2 = new ConversationChain({
  // your configuration here
});

const chain3 = new LLMChain({
  // your configuration here
});

const overallChain = new SimpleSequentialChain({
  chains: [chain1, chain2, chain3],
  verbose: true,
});

Please ensure that each chain in the chains array of SimpleSequentialChain has exactly one input and one output. If a chain does not meet these criteria, an error will be thrown.

For more information, you can refer to the following sources:

• langchain/src/chains/tests/simple_sequential_chain.int.test.ts
• langchain/src/chains/sequential_chain.ts
• langchain/src/chains/tests/simple_sequential_chain.test.ts
• langchain/src/chains/tests/sequential_chain.test.ts
• langchain/src/chains/tests/sequential_chain.int.test.ts

I hope this helps! If you have any other questions, feel free to ask.

Sources

• create appendChain to switch between Chains
• langchain/src/chains/tests/simple_sequential_chain.int.test.ts
• langchain/src/chains/sequential_chain.ts
• langchain/src/chains/tests/simple_sequential_chain.test.ts
• langchain/src/chains/tests/sequential_chain.test.ts
• langchain/src/chains/tests/sequential_chain.int.test.ts
• langchain/src/chains/retrieval_qa.ts

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[SadeeshaJayaweera]

Yes, you can definitely add multiple chains, including RetrievalQAChain, ConversationChain, and other chains, to a SimpleSequentialChain in JavaScript. Your code structure looks good, but you have a couple of issues with class names, and you should pass instances of chains, not the class names. Here's the corrected code:

const chain1 = new ConversationChain({
  memory: new BufferMemory({ returnMessages: true, memoryKey: "history" }),
  prompt: chatPrompt,
  llm: chat,
});

const chain2 = new RetrievalQAChain({
  combineDocumentsChain: loadQAStuffChain(model),
  retriever: vectorStore.asRetriever(),
  returnSourceDocuments: true,
});

// Create instances of your additional chains (e.g., LLMChain)
const chain3 = new LLMChain(/* parameters */);

// Add all the chains to the SimpleSequentialChain
const overallChain = new SimpleSequentialChain({
  chains: [chain1, chain2, chain3 /* Add other chains here */],
  verbose: true,
});

In this corrected code:

• You create instances of your ConversationChain, RetrievalQAChain, and any other chains you want to add.
• Then, you include these instances in the chains array when creating your SimpleSequentialChain.

This way, you have a sequence of chains within overallChain. Make sure to replace /* parameters */ with the appropriate parameters and settings for your LLMChain and other chains.