“Meteor code must always run within a Fiber” when calling Collection.insert on server

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Just wrapping your function in a Fiber might not be enough and can lead to unexpected behavior.

The reason is, along with Fiber, Meteor requires a set of variables attached to a fiber. Meteor uses data attached to a fiber as a dynamic scope and the easiest way to use it with 3rd party api is to use Meteor.bindEnvironment.

T.post('someurl', Meteor.bindEnvironment(function (err, res) {
  // do stuff
  // can access Meteor.userId
  // still have MongoDB write fence
}, function () { console.log('Failed to bind environment'); }));

Watch these videos on evented mind if you want to know more:
https://www.eventedmind.com/posts/meteor-dynamic-scoping-with-environment-variables
https://www.eventedmind.com/posts/meteor-what-is-meteor-bindenvironment

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