import { IExecuteFunctions } from 'n8n-core'; import { IDataObject, INodeExecutionData, INodeType, INodeTypeDescription, } from 'n8n-workflow'; // @ts-ignore import * as mysql2 from 'mysql2/promise'; import { copyInputItems } from './GenericFunctions'; export class MySql implements INodeType { description: INodeTypeDescription = { displayName: 'MySQL', name: 'mySql', icon: 'file:mysql.png', group: ['input'], version: 1, description: 'Gets, add and update data in MySQL.', defaults: { name: 'MySQL', color: '#4279a2', }, inputs: ['main'], outputs: ['main'], credentials: [ { name: 'mySql', required: true, } ], properties: [ { displayName: 'Operation', name: 'operation', type: 'options', options: [ { name: 'Execute Query', value: 'executeQuery', description: 'Executes a SQL query.', }, { name: 'Insert', value: 'insert', description: 'Insert rows in database.', }, { name: 'Update', value: 'update', description: 'Updates rows in database.', }, ], default: 'insert', description: 'The operation to perform.', }, // ---------------------------------- // executeQuery // ---------------------------------- { displayName: 'Query', name: 'query', type: 'string', typeOptions: { rows: 5, }, displayOptions: { show: { operation: [ 'executeQuery' ], }, }, default: '', placeholder: 'SELECT id, name FROM product WHERE id < 40', required: true, description: 'The SQL query to execute.', }, // ---------------------------------- // insert // ---------------------------------- { displayName: 'Table', name: 'table', type: 'string', displayOptions: { show: { operation: [ 'insert' ], }, }, default: '', required: true, description: 'Name of the table in which to insert data to.', }, { displayName: 'Columns', name: 'columns', type: 'string', displayOptions: { show: { operation: [ 'insert' ], }, }, default: '', placeholder: 'id,name,description', description: 'Comma separated list of the properties which should used as columns for the new rows.', }, // ---------------------------------- // update // ---------------------------------- { displayName: 'Table', name: 'table', type: 'string', displayOptions: { show: { operation: [ 'update' ], }, }, default: '', required: true, description: 'Name of the table in which to update data in', }, { displayName: 'Update Key', name: 'updateKey', type: 'string', displayOptions: { show: { operation: [ 'update' ], }, }, default: 'id', required: true, description: 'Name of the property which decides which rows in the database should be updated. Normally that would be "id".', }, { displayName: 'Columns', name: 'columns', type: 'string', displayOptions: { show: { operation: [ 'update' ], }, }, default: '', placeholder: 'name,description', description: 'Comma separated list of the properties which should used as columns for rows to update.', }, ] }; async execute(this: IExecuteFunctions): Promise { const credentials = this.getCredentials('mySql'); if (credentials === undefined) { throw new Error('No credentials got returned!'); } const connection = await mysql2.createConnection(credentials); const items = this.getInputData(); const operation = this.getNodeParameter('operation', 0) as string; let returnItems = []; if (operation === 'executeQuery') { // ---------------------------------- // executeQuery // ---------------------------------- const queryQueue = items.map((item, index) => { const rawQuery = this.getNodeParameter('query', index) as string; return connection.query(rawQuery); }); let queryResult = await Promise.all(queryQueue); queryResult = queryResult.reduce((collection, result) => { const [rows, fields] = result; if (Array.isArray(rows)) { return collection.concat(rows); } collection.push(rows); return collection; }, []); returnItems = this.helpers.returnJsonArray(queryResult as IDataObject[]); } else if (operation === 'insert') { // ---------------------------------- // insert // ---------------------------------- const table = this.getNodeParameter('table', 0) as string; const columnString = this.getNodeParameter('columns', 0) as string; const columns = columnString.split(',').map(column => column.trim()); const insertItems = copyInputItems(items, columns); const insertPlaceholder = `(${columns.map(column => '?').join(',')})`; const insertSQL = `INSERT INTO ${table}(${columnString}) VALUES ${items.map(item => insertPlaceholder).join(',')};`; const queryItems = insertItems.reduce((collection, item) => collection.concat(Object.values(item as any)), []); // tslint:disable-line:no-any const queryResult = await connection.query(insertSQL, queryItems); returnItems = this.helpers.returnJsonArray(queryResult[0] as IDataObject); } else if (operation === 'update') { // ---------------------------------- // update // ---------------------------------- const table = this.getNodeParameter('table', 0) as string; const updateKey = this.getNodeParameter('updateKey', 0) as string; const columnString = this.getNodeParameter('columns', 0) as string; const columns = columnString.split(',').map(column => column.trim()); if (!columns.includes(updateKey)) { columns.unshift(updateKey); } const updateItems = copyInputItems(items, columns); const updateSQL = `UPDATE ${table} SET ${columns.map(column => `${column} = ?`).join(',')} WHERE ${updateKey} = ?;`; const queryQueue = updateItems.map((item) => connection.query(updateSQL, Object.values(item).concat(item[updateKey]))); let queryResult = await Promise.all(queryQueue); queryResult = queryResult.map(result => result[0]); returnItems = this.helpers.returnJsonArray(queryResult as IDataObject[]); } else { await connection.end(); throw new Error(`The operation "${operation}" is not supported!`); } await connection.end(); return this.prepareOutputData(returnItems); } }