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Prepare your Meteor.js project for the big 3.0 release!

Jan Küster on November 01, 2023

Meteor.js 3.0 is an upcoming major release with lots of breaking changes. The platform is moving away from Fibers to use Node's native async await ...
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Jan Dvorak •

For the count, the migration should be more advanced, from documentation:

This method is deprecated since MongoDB 4.0; see Collection.countDocuments and Collection.estimatedDocumentCount for a replacement.

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Jan Küster •

Thanks for the hint, I will update this one

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Carlos Alvidrez •

Trying to use the ValidationMethod override, but stomped with this error... not sure if the "analyze" method requires another import?

Exception while invoking method 'XXX' ReferenceError: analyze is not defined
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Thanks!

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Jan Küster •

Did you use the jkuester:migration-helper package or did you used the code from this article?

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Carlos Alvidrez •

Hi! Both... here's the snippet. Puzzled because I read the code and figure out a couple of imports might be required... but the helper still outputs to the console that my method is not async yet.

//import { getLocation, analyze } from 'meteor/jkuester:migration-helper';
import { checkAsyncMixin } from 'meteor/jkuester:migration-helper';
import { getLocation } from 'meteor/jkuester:migration-helper';
import { analyze } from 'meteor/jkuester:migration-helper';

const originalExec = ValidatedMethod.prototype._execute;
ValidatedMethod.prototype._execute = function (...args) {
    const self = this;
    console.log("--> self.name:", self.name);
    //console.log("getLocation():", getLocation());
    analyze({
        name: self.name,
        location: getLocation(),
        type: 'ValidatedMethod',
        fn: self.run
    });
    return originalExec.call(self, ...args);
};
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And this is the method code (very simple case):

export const pubVersesPaginationPassageRateLimiter = new ValidatedMethod({
    name: 'pubVersesPaginationPassageRateLimiter',
    validate: new SimpleSchema({
        source: { type: String },
    }).validator(),
    async run({}) {
        return true;
    }
});
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Any advice will be appreciated... working hard on refactoring my webapp to migrate to v3 ASAP.

Cheers

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jankapunkt profile image
Jan Küster •

Thanks for the examples I will try to reproduce this. In the meantime, there has also been an eslint-plugin being developed by quave, which can also help you to detect parts that need migration (it is specifically designed for this task):

github.com/quavedev/eslint-plugin

Will get back to you when I find the cause for the issue.

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Carlos Alvidrez •

Thank you!

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Carlos Alvidrez •

Also, wanted to pick someone's brain around how to fix these issues... must I find new packages for these? (debugging results from the suggested migration helper package):

Deprecated (Publication): meteor_autoupdate_clientVersions is not async, consider migrating now.
  => at packages/autoupdate/autoupdate_server.js:109:8

Deprecated (Publication): _roles is not async, consider migrating now.
  => at module (packages/alanning:roles/roles/roles_server.js:30:8)

Deprecated (Method): slingshot/uploadRequest is not async, consider migrating now.
  => at packages/edgee_slingshot.js:404:8

Deprecated: Collection.findOne needs to be migrated to findOneAsync in collection "__dummy_coll_4MqSQRvCKueAzPu9m"!
=> at module (packages/mdg:meteor-apm-agent/lib/hijack/meteorx.js:34:12)
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Carlos Alvidrez •

Another one:

Deprecated: Collection.update needs to be migrated to updateAsync in collection "meteor_accounts_loginServiceConfiguration"!
=> at Collection.upsert (packages/mongo/collection.js:785:17)
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Carlos Alvidrez •

Is there a pagination package you'd recommend to use for Meteor 3?
I am using this one but it's not been maintained and JKuster's migration helper reports the underlying methods not being async.

github.com/Kurounin/Pagination/tre...

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Carlos Alvidrez •

I believe this library was causing me trouble as it trips the migration helper... as soon as I removed it, all my methods stopped reporting not being async.

mdg:meteor-apm-agent

@jankapunkt FYI