Cannot read property '_str' of undefined

[ThusStyles]

Getting strange random error, not sure exactly how to solve, search still works but stay loading forever and seems to cause cpu/memory leaks.

Exception in delivering result of invoking 'search.source': TypeError: Cannot read property 'str' of undefined
at http://localhost:3000/packages/meteorhacks_search-source.js?b3122033999151d35259310e0ffa257e17669508:125:25
at Array.forEach (native)
at Function..each._.forEach (http://localhost:3000/packages/underscore.js?0a80a8623e1b40b5df5a05582f288ddd586eaa18:156:11)
at SearchSource._updateStore (http://localhost:3000/packages/meteorhacks_search-source.js?b3122033999151d35259310e0ffa257e17669508:123:5)
at handleData (http://localhost:3000/packages/meteorhacks_search-source.js?b3122033999151d35259310e0ffa257e17669508:89:14)
at Meteor.bindEnvironment as _callback
at _.extend._maybeInvokeCallback (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:3860:12)
at _.extend.receiveResult (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:3880:10)
at _.extend._livedata_result (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:4970:9)
at onMessage (http://localhost:3000/packages/ddp.js?d1840d3ba04c65ffade261f362e26699b7509706:3725:12)

[arunoda]

Seems like you are not sending _id for each documents from server.

[ThusStyles]

I am sending them, if I do a console log of the data returned in the search source method then it shows documents with an _id field

[lorensr]

I had this problem. Transporter was converting _id to id, so I fixed it by copying id to _id before returning the data in SearchSource.defineSource.

[biofractal]

I had exactly this problem whilst following along with the bulletproofmeteor Building a Real-World Search App – Meteor Package Search tutorial. @lorensr 's reply above gave me the hint I needed but it didn't quite fit what I was seeing so here is my fix.

In your SearchSource.defineSource there may well be a map function similar to this:

_Before_

var data = result.hits.hits.map(function(doc) {
    var source = _.clone(doc._source);
    source._score = doc._score;
    return source;
});

The problem is that this map does not include the _id in the source. So you need to update it to this:

_After_

var data = result.hits.hits.map(function(doc) {
    var source = _.clone(doc._source);
    source._score = doc._score;
    source._id = doc._id; // <- add this line
    return source;
});

Once you include the _id into the source then the SearchSource error goes away and all is well.

[davegariepy]

Thanks @biofractal, that fixed it for me!

[derekclair]

Thanks @biofractal! I as well had the same issue, fixed me right up.