82 lines
2.3 KiB
TypeScript
82 lines
2.3 KiB
TypeScript
import { INode, INodeData, INodeParams } from '../../../src/Interface'
|
|
import { SqlDatabaseChain } from 'langchain/chains'
|
|
import { getBaseClasses } from '../../../src/utils'
|
|
import { DataSource } from 'typeorm'
|
|
import { SqlDatabase } from 'langchain/sql_db'
|
|
import { BaseLLM } from 'langchain/llms/base'
|
|
|
|
class SqlDatabaseChain_Chains implements INode {
|
|
label: string
|
|
name: string
|
|
type: string
|
|
icon: string
|
|
category: string
|
|
baseClasses: string[]
|
|
description: string
|
|
inputs: INodeParams[]
|
|
|
|
constructor() {
|
|
this.label = 'Sql Database Chain'
|
|
this.name = 'sqlDatabaseChain'
|
|
this.type = 'SqlDatabaseChain'
|
|
this.icon = 'sqlchain.svg'
|
|
this.category = 'Chains'
|
|
this.description = 'Answer questions over a SQL database'
|
|
this.baseClasses = [this.type, ...getBaseClasses(SqlDatabaseChain)]
|
|
this.inputs = [
|
|
{
|
|
label: 'LLM',
|
|
name: 'llm',
|
|
type: 'BaseLLM'
|
|
},
|
|
{
|
|
label: 'Database',
|
|
name: 'database',
|
|
type: 'options',
|
|
options: [
|
|
{
|
|
label: 'SQlite',
|
|
name: 'sqlite'
|
|
}
|
|
],
|
|
default: 'sqlite'
|
|
},
|
|
{
|
|
label: 'Database File Path',
|
|
name: 'dbFilePath',
|
|
type: 'string',
|
|
placeholder: 'C:/Users/chinook.db'
|
|
}
|
|
]
|
|
}
|
|
|
|
async init(nodeData: INodeData): Promise<any> {
|
|
const databaseType = nodeData.inputs?.database
|
|
const llm = nodeData.inputs?.llm as BaseLLM
|
|
const dbFilePath = nodeData.inputs?.dbFilePath
|
|
|
|
const datasource = new DataSource({
|
|
type: databaseType,
|
|
database: dbFilePath
|
|
})
|
|
|
|
const db = await SqlDatabase.fromDataSourceParams({
|
|
appDataSource: datasource
|
|
})
|
|
|
|
const chain = new SqlDatabaseChain({
|
|
llm,
|
|
database: db
|
|
})
|
|
return chain
|
|
}
|
|
|
|
async run(nodeData: INodeData, input: string): Promise<string> {
|
|
const chain = nodeData.instance as SqlDatabaseChain
|
|
const res = await chain.run(input)
|
|
return res
|
|
}
|
|
}
|
|
|
|
module.exports = { nodeClass: SqlDatabaseChain_Chains }
|