CODEWITHSUNDEEP
node.jsmongodbmeteor
Behrouz Riahi
Behrouz Riahi

Reputation: 1791

findOne returns undefined on the server

Here is my code on the server:

Meteor.publish('currentRequest', function (requestId) {
        console.log('from publish');
        console.log(requestId) // The id is printed successfully
        console.log(Requests.findOne({_id: requestId})) // returns undefined
        return Requests.findOne({_id: requestId});
    });

The item ID is printed but .findOne() doesn't seem to work as it returns undefined.

What am I doing wrong here?

Upvotes: 1

Views: 4034

Answers (2)

Styx
Styx

Reputation: 10076

The answer to your question will be: because there is no document satisfying your search query.

According to documentation:

Finds the first document that matches the selector, as ordered by sort and skip options. Returns undefined if no matching document is found.

Equivalent to find(selector, options).fetch()[0] with options.limit = 1.

Also, as it has been pointed by @GaëtanRouziès, this publication won't work, because .findOne returns document/undefined instead of cursor.

Upvotes: 2

Ricky
Ricky

Reputation: 155

.findOne() return the response in asynchronus way. you need to pass a callback function to findOne and use return statement in callback function. Please take a look at the sample code below.

CollectionName.findOne({
     query : query
   }, function(err, resp) {
   if (err) {
     throw err;
   } else {
     return resp;
   }
});

Upvotes: -1

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