Error when key doesn't exist

[dustinmartin]

Inside of get.js, line 43, hgetall is used to get a value from redis. It doesn't handle the case when the key doesn't exist. If the key doesn't exist then result is null which results in the below error being thrown. It looks like keys is used to check if the key exists but it could expire or be deleted in between the time that keys is called and hgetall is called.

TypeError: Cannot set property 'name' of null
    at Command.<anonymous> (/Users/dustinmartin/Projects/api/node_modules/express-redis-cache/lib/ExpressRedisCache/get.js:45:27)
    at intercepted (domain.js:251:14)
    at Command.runIntercepted (domain.js:265:12)
    at Command.nrWrappedHandler (/Users/dustinmartin/Projects/api/node_modules/newrelic/lib/transaction/tracer/index.js:398:19)
    at Command.wrapped (/Users/dustinmartin/Projects/api/node_modules/newrelic/lib/transaction/tracer/index.js:182:28)
    at Command.wrappedCallback (/Users/dustinmartin/Projects/api/node_modules/newrelic/lib/transaction/tracer/index.js:450:66)
    at Command.wrapped (/Users/dustinmartin/Projects/api/node_modules/newrelic/lib/transaction/tracer/index.js:182:28)
    at bound (domain.js:280:14)
    at Command.runBound (domain.js:293:12)
    at normal_reply (/Users/dustinmartin/Projects/api/node_modules/redis/index.js:662:21)
    at RedisClient.return_reply (/Users/dustinmartin/Projects/api/node_modules/redis/index.js:722:9)
    at JavascriptReplyParser.RedisClient.reply_parser.Parser.returnReply (/Users/dustinmartin/Projects/api/node_modules/redis/index.js:146:18)
    at JavascriptReplyParser.run (/Users/dustinmartin/Projects/api/node_modules/redis-parser/lib/javascript.js:137:18)
    at JavascriptReplyParser.execute (/Users/dustinmartin/Projects/api/node_modules/redis-parser/lib/javascript.js:112:10)
    at Socket.<anonymous> (/Users/dustinmartin/Projects/api/node_modules/redis/index.js:223:27)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at readableAddChunk (_stream_readable.js:172:18)
    at Socket.Readable.push (_stream_readable.js:130:10)
    at TCP.onread (net.js:542:20)
[nodemon] app crashed - waiting for file changes before starting...

[dustinmartin]

I've created this PR to fix this issue: #77

[krazyjakee]

#77