react-meteor | Meteor Reactivity for your React application | Frontend Framework library

I have the following code that passing leadsBuilder props to lead in the LeadBuilderSingle componenet. It has an array in a object and I access that array and try to map over it but it returns undefined. The data is being waited on and I am using isLoading, so I am not sure what is causing this error. It loads on first loading, but on page refresh gives me undefined.

I have a form that takes its state from a react useState hook, that hooks default value I would like to come from a useTracker call, I am using pub sub in Meteor to do this. I get a error Cannot access '' before initialization I know it has something to do with the lead not being ready yet and returning undefined and the hook not being able to use that, at least I think so. But I am not sure how to solve that.

Here is my code thus far

I am getting multiple return values for a Mongo.collection.findOne query by ID, in Meteor JS and React. I think it has to do with the fact that it is rerendering, I have tried to use useEffect but it does not work the way I implemented it, which is just wrapping the lead variable in the useEffect.

Here is my code

After upgrading to Meteor 1.5 from 1.4, createContainer function from react-meteor-data gives the following error:

I am new to Meteor 1.7 i was following the tutorial for the simple-todos app. But after i added the react-meteor-data package it broke my app. I keep getthing the following the error.

The reactive aggregation is published to the client initially without errors. The error seems to be triggered, when the Meteor.user collection is being updated by a Meteor.call() from the client:

I need to pass props to my initial state for an edit form (as I want then the value of the form to be equal to the state) but I can't seem to have it working. The component doesn't give the props to the initialState as it firsts load with an empty props, I think due to the createContainer. I tried lot of things (componentDidMount, WillMount, WillReceiveProps...) but didn't succeed to have it work. The code is below, any idea to help ?

This is a very basic example how I get the data from the mongoDB to my meteor/react application.

Now I would like to show a loading icon while the data is getting loaded. Therefore I need to use something like subscription.ready() but where should I put this?

I have been trying for a while to learn how to build mobile apps with Javascript, and honestly I have no idea how anyone is able to do anything. Everything is broken. Every tutorial I've tried has failed to work for some bizarre reason. I am at my wits end.

I've finally decided to try and be even simpler, and just do the most basic tutorial I can find. What could go wrong. Well, it only took 3 pages of almost no code to completely stop working. I've done this, and I cannot insert anything to my db. My app fetches no data. When trying to add a new task, it gets added then disappears almost immediately, with a message stating insert failed: Method '/tasks/insert' not found (not even an error with some traceback).

The code really couldn't be simpler:

// imports/api/tasks.js