Lookup?

[hamild]

Is there a way to perform $lookup ? As I understand it, this is the equivalent of a JOIN in SQL. I am very new to MongoDB, so apologies in advance if this is off topic.

[ozomer]

You can find all the operations here: http://mongodb.github.io/node-mongodb-native/2.2/api/Collection.html . The node-red-contrib-mongodb2 node simply calls those functions, using msg.payload for parameters (msg.payload[0] for the first parameter, msg.payload[1] for the second parameter, etc.).