How to enforce rules on updating our collections?

 

 

To change the values of a document without deleting it first, use the __ operator. This operator will only change the values of the specified fields without affecting the rest of the document?

This data model works pretty well, But it has an one major weak point. Which of the following do you think it is? { "_id": "one", "text": "Meteor - Full Stack Javascript Platform", "parent": null } { "_id": "two", "text": "Why do you say so?", "parent": "one" } {{each getComments}} {{text}} {{if haveChildren}} {{> comments}} {{/if}} {{/each}} Template.comments.helpers({ getComments: function(){ var parent = this._id || null; return Comments.find({parent: parent}); }, haveChildren: function(){ return Comments.find({parent: this._id}).count() > 0; } })

Meteor’s automatic handling of optimistic UI, if a method unexpectedly fails the optimistic changes will roll back and the Minimongo database will end up in a consistent state?