Collection.findOne asynchronous?

help
1

I read somewhere that I can write code for database queries in meteor in a synchronous manner.

var conversation = Meteor.conversations.findOne({
          id: this.props.conversationId,
        });

        conversation.sendMessage(this.state.message);

When I run the above code fragment, it returns the following error:

Uncaught TypeError: Cannot read property ‘sendMessage’ of undefined.

Why is this? Should I move the conversation.sendMessage part to a callback?
Please help!

2

That’s correct. However, if you are doing this on the client, you do need to ensure that the collection is ready. Typically, you would subscribe (on the client) to a publication (on the server), and then check in the client for the readiness of the subscription. Check basic pub/sub here.

Also, the query part of your find uses id, which may not be what you intended - did you mean _id?