delete hardcore database name

Author: Manuel Ortiz

lib/sqlite3db.js

@@ -78,7 +78,7 @@ SQLiteDB.prototype.getDefaultIdType = function () {
 SQLiteDB.prototype.connect = function (callback) {
   callback = bindDomain(process.domain, callback);
   var self = this;
-  var file_name = ((self.file_name !== null) ? self.file_name : ":memory:");
+  var file_name = SQLiteDB.prototype.file_name = ((self.file_name !== null) ? self.file_name : ":memory:");
   var err = null;
   if(self.client === undefined) {
     self.client = new self.sqlite3.Database(file_name, self.sqlite3.OPEN_READWRITE | self.sqlite3.OPEN_CREATE, function(error){

lib/transactions.js

@@ -10,8 +10,10 @@ module.exports = mixinTransactions;
 
 function mixinTransactions(SQLiteDB) {
 
+    var self = SQLiteDB;
+
     SQLiteDB.prototype.beginTransaction = (isolation, cb) => {
-        var db = new TransactionDatabase(new sqlite3.Database(":memory:", sqlite3.OPEN_READWRITE | sqlite3.OPEN_CREATE));
+        var db = new TransactionDatabase(new sqlite3.Database(self.prototype.file_name, sqlite3.OPEN_READWRITE | sqlite3.OPEN_CREATE));
         return db.beginTransaction(cb);
     }