Cannot read property 'transactionLineItem' of undefined

[yeldarby]

General information

• SDK/Library version: 2.12.0
• Environment: Sandbox
• Language, language version, and OS: Node v8.11.3 on Mac OS

Issue description

I'm trying to use the Transaction.lineItems method and getting an error.

/Users/yeldarb/Code/hatchlings-club/www/node_modules/braintree/lib/braintree/transaction.js:138
    return this[gatewaySymbol].transactionLineItem.findAll(this.id);
                               ^

TypeError: Cannot read property 'transactionLineItem' of undefined
    at Transaction.lineItems (/Users/yeldarb/Code/hatchlings-club/www/node_modules/braintree/lib/braintree/transaction.js:138:32)
    at Transaction.<anonymous> (/Users/yeldarb/Code/hatchlings-club/www/node_modules/@braintree/wrap-promise/wrap-promise.js:17:33)
    at async.mapLimit.output.data (/Users/yeldarb/Code/hatchlings-club/www/index.js:493:30)
    at /Users/yeldarb/Code/hatchlings-club/www/node_modules/async/dist/async.js:1121:9
    at replenish (/Users/yeldarb/Code/hatchlings-club/www/node_modules/async/dist/async.js:998:17)
    at /Users/yeldarb/Code/hatchlings-club/www/node_modules/async/dist/async.js:1002:9
    at _asyncMap (/Users/yeldarb/Code/hatchlings-club/www/node_modules/async/dist/async.js:1119:5)
    at Object.mapLimit (/Users/yeldarb/Code/hatchlings-club/www/node_modules/async/dist/async.js:1205:16)
    at SearchResponseStream.<anonymous> (/Users/yeldarb/Code/hatchlings-club/www/index.js:492:10)
    at emitNone (events.js:106:13)

Here's an minimal code snippet that reproduces the error:

var stream = gateway.transaction.search(function(search) {
    search.customerId().is(<SOME_USER_ID_HERE>);
});

stream.on('data', function(t) {
    t.lineItems();
});

[yeldarby]

I should note as a followup that this does work. It's just the Transaction.lineItems method that's broken.

var stream = gateway.transaction.search(function(search) {
    search.customerId().is(<SOME_USER_ID_HERE>);
});

stream.on('data', function(t) {
    gateway.transactionLineItem.findAll(transaction.id, function(e, items) {
        console.log(items);
    });
});

[crookedneighbor]

My guess is that there's something funky going on with the wrapping of the transaction search results, as the method does exist on the transaction object returns from transaction.sale https://github.com/braintree/braintree_node/blob/dcd9f1984bcec888994e92c97cdcd7653976c90b/spec/integration/braintree/transaction_gateway_spec.js#L450-L464

[crookedneighbor]

We've identified the issue and are working on a fix. Thanks for the report!

[hollabaq86]

@yeldarby We've deployed a fix to this issue in version 2.13.1.