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kosmikko/credits.js

Last active January 21, 2016 10:01
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Credits transfer (find issues with it)
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credits.js
function transferCredits(from, to, amt) {
var fromAccount = db.game_accounts.findOne({"name": from},{"credits": 1});
var toAccount = db.game_accounts.findOne({"name": to},{"credits": 1});
db.game_accounts.update({name: from}, {$set: {credits: fromAccount.credits - amt}});
db.game_accounts.update({name: to}, {$set: {credits: toAccount.credits + amt}});
}
db.game_accounts.insert({name: "John", credits: 1000});
db.game_accounts.insert({name: "Jane", credits: 1000});
// John transfers credits to Jane
transferCredits("John", "Jane", 100);
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