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upgrade mongodb client to support mongodb 4.2 and allow conn string override

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This commit is contained in:
Chris Lonardo
2020-04-05 21:06:00 -04:00
parent 30e5960248
commit c6aa73cc2f
7 changed files with 279 additions and 217 deletions
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245
packages/nodes-base/nodes/MongoDb/MongoDb.node.ts
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@@ -1,227 +1,85 @@
import { IExecuteFunctions } from 'n8n-core';
import { IExecuteFunctions } from "n8n-core";
import {
IDataObject,
INodeExecutionData,
INodeType,
INodeTypeDescription,
} from 'n8n-workflow';
import { MongoClient } from 'mongodb';
/**
* Returns of copy of the items which only contains the json data and
* of that only the define properties
*
* @param {INodeExecutionData[]} items The items to copy
* @param {string[]} properties The properties it should include
* @returns
*/
function getItemCopy(items: INodeExecutionData[], properties: string[]): IDataObject[] {
// Prepare the data to insert and copy it to be returned
let newItem: IDataObject;
return items.map((item) => {
newItem = {};
for (const property of properties) {
if (item.json[property] === undefined) {
newItem[property] = null;
} else {
newItem[property] = JSON.parse(JSON.stringify(item.json[property]));
}
}
return newItem;
});
}
} from "n8n-workflow";
import { nodeDescription } from "./mongo.node.options";
import { MongoClient } from "mongodb";
import { getItemCopy, buildParameterizedConnString } from "./mongo.node.utils";
export class MongoDb implements INodeType {
description: INodeTypeDescription = {
displayName: 'MongoDB',
name: 'mongoDb',
icon: 'file:mongoDb.png',
group: ['input'],
version: 1,
description: 'Find, insert and update documents in MongoDB.',
defaults: {
name: 'MongoDB',
color: '#13AA52',
},
inputs: ['main'],
outputs: ['main'],
credentials: [
{
name: 'mongoDb',
required: true,
}
],
properties: [
{
displayName: 'Operation',
name: 'operation',
type: 'options',
options: [
{
name: 'Find',
value: 'find',
description: 'Find documents.',
},
{
name: 'Insert',
value: 'insert',
description: 'Insert documents.',
},
{
name: 'Update',
value: 'update',
description: 'Updates documents.',
},
],
default: 'find',
description: 'The operation to perform.',
},
{
displayName: 'Collection',
name: 'collection',
type: 'string',
required: true,
default: '',
description: 'MongoDB Collection'
},
// ----------------------------------
// find
// ----------------------------------
{
displayName: 'Query (JSON format)',
name: 'query',
type: 'string',
typeOptions: {
rows: 5,
},
displayOptions: {
show: {
operation: [
'find'
],
},
},
default: '{}',
placeholder: `{ "birth": { "$gt": "1950-01-01" } }`,
required: true,
description: 'MongoDB Find query.',
},
// ----------------------------------
// insert
// ----------------------------------
{
displayName: 'Fields',
name: 'fields',
type: 'string',
displayOptions: {
show: {
operation: [
'insert'
],
},
},
default: '',
placeholder: 'name,description',
description: 'Comma separated list of the fields to be included into the new document.',
},
// ----------------------------------
// update
// ----------------------------------
{
displayName: 'Update Key',
name: 'updateKey',
type: 'string',
displayOptions: {
show: {
operation: [
'update'
],
},
},
default: 'id',
required: true,
description: 'Name of the property which decides which rows in the database should be updated. Normally that would be "id".',
},
{
displayName: 'Fields',
name: 'fields',
type: 'string',
displayOptions: {
show: {
operation: [
'update'
],
},
},
default: '',
placeholder: 'name,description',
description: 'Comma separated list of the fields to be included into the new document.',
},
]
};
description: INodeTypeDescription = nodeDescription;
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
const credentials = this.getCredentials("mongoDb");
const credentials = this.getCredentials('mongoDb');
// user can optionally override connection string
const useOverriddenConnString = this.getNodeParameter(
"shouldOverrideConnString",
0
) as boolean;
if (credentials === undefined) {
throw new Error('No credentials got returned!');
throw new Error("No credentials got returned!");
}
let connectionUri = '';
if (credentials.port) {
connectionUri = `mongodb://${credentials.user}:${credentials.password}@${credentials.host}:${credentials.port}`;
let connectionUri = "";
if (useOverriddenConnString === true) {
const connStringInput = this.getNodeParameter(
"connStringOverrideVal",
0
) as string;
if (connStringInput && connStringInput.length > 0) {
connectionUri = connStringInput;
} else {
throw new Error(
"Cannot override credentials: valid MongoDB connection string not provided "
);
}
} else {
connectionUri = `mongodb+srv://${credentials.user}:${credentials.password}@${credentials.host}`;
connectionUri = buildParameterizedConnString(credentials);
}
const client = await MongoClient.connect(connectionUri, { useNewUrlParser: true, useUnifiedTopology: true });
const client: MongoClient = await MongoClient.connect(connectionUri, {
useNewUrlParser: true,
useUnifiedTopology: true,
});
const mdb = client.db(credentials.database as string);
let returnItems = [];
const items = this.getInputData();
const operation = this.getNodeParameter('operation', 0) as string;
const operation = this.getNodeParameter("operation", 0) as string;
if (operation === 'find') {
if (operation === "find") {
// ----------------------------------
// find
// ----------------------------------
const queryResult = await mdb
.collection(this.getNodeParameter('collection', 0) as string)
.find(JSON.parse(this.getNodeParameter('query', 0) as string))
.collection(this.getNodeParameter("collection", 0) as string)
.find(JSON.parse(this.getNodeParameter("query", 0) as string))
.toArray();
returnItems = this.helpers.returnJsonArray(queryResult as IDataObject[]);
} else if (operation === 'insert') {
} else if (operation === "insert") {
// ----------------------------------
// insert
// ----------------------------------
// Prepare the data to insert and copy it to be returned
const fields = (this.getNodeParameter('fields', 0) as string)
.split(',')
.map(f => f.trim())
.filter(f => !!f);
const fields = (this.getNodeParameter("fields", 0) as string)
.split(",")
.map((f) => f.trim())
.filter((f) => !!f);
const insertItems = getItemCopy(items, fields);
const { insertedIds } = await mdb
.collection(this.getNodeParameter('collection', 0) as string)
.collection(this.getNodeParameter("collection", 0) as string)
.insertMany(insertItems);
// Add the id to the data
@@ -230,20 +88,20 @@ export class MongoDb implements INodeType {
json: {
...insertItems[parseInt(i, 10)],
id: insertedIds[parseInt(i, 10)] as string,
}
},
});
}
} else if (operation === 'update') {
} else if (operation === "update") {
// ----------------------------------
// update
// ----------------------------------
const fields = (this.getNodeParameter('fields', 0) as string)
.split(',')
.map(f => f.trim())
.filter(f => !!f);
const fields = (this.getNodeParameter("fields", 0) as string)
.split(",")
.map((f) => f.trim())
.filter((f) => !!f);
let updateKey = this.getNodeParameter('updateKey', 0) as string;
let updateKey = this.getNodeParameter("updateKey", 0) as string;
updateKey = updateKey.trim();
if (!fields.includes(updateKey)) {
@@ -258,16 +116,15 @@ export class MongoDb implements INodeType {
continue;
}
const filter: { [key: string] :string } = {};
const filter: { [key: string]: string } = {};
filter[updateKey] = item[updateKey] as string;
await mdb
.collection(this.getNodeParameter('collection', 0) as string)
.collection(this.getNodeParameter("collection", 0) as string)
.updateOne(filter, { $set: item });
}
returnItems = this.helpers.returnJsonArray(updateItems as IDataObject[]);
} else {
throw new Error(`The operation "${operation}" is not supported!`);
}