Merge pull request #5291 from stuartpb/patch-1

Fix "the dialect is not supported" error

lib/sequelize.js

@@ -188,31 +188,29 @@ var Sequelize = function(database, username, password, options) {
     dialectOptions: this.options.dialectOptions
   };
 
-  try {
-    var Dialect;
-    // Requiring the dialect in a switch-case to keep the
-    // require calls static. (Browserify fix)
-    switch (this.getDialect()){
-      case 'mariadb':
-        Dialect = require('./dialects/mariadb');
-        break;
-      case 'mssql':
-        Dialect = require('./dialects/mssql');
-        break;
-      case 'mysql':
-        Dialect = require('./dialects/mysql');
-        break;
-      case 'postgres':
-        Dialect = require('./dialects/postgres');
-        break;
-      case 'sqlite':
-        Dialect = require('./dialects/sqlite');
-        break;
-    }
-    this.dialect = new Dialect(this);
-  } catch (err) {
-    throw new Error('The dialect ' + this.getDialect() + ' is not supported. Supported dialects: mariadb, mssql, mysql, postgres, and sqlite. ('+err+')');
+  var Dialect;
+  // Requiring the dialect in a switch-case to keep the
+  // require calls static. (Browserify fix)
+  switch (this.getDialect()){
+    case 'mariadb':
+      Dialect = require('./dialects/mariadb');
+      break;
+    case 'mssql':
+      Dialect = require('./dialects/mssql');
+      break;
+    case 'mysql':
+      Dialect = require('./dialects/mysql');
+      break;
+    case 'postgres':
+      Dialect = require('./dialects/postgres');
+      break;
+    case 'sqlite':
+      Dialect = require('./dialects/sqlite');
+      break;
+    default:
+      throw new Error('The dialect ' + this.getDialect() + ' is not supported. Supported dialects: mariadb, mssql, mysql, postgres, and sqlite.');
   }
+  this.dialect = new Dialect(this);
 
   this.dialect.QueryGenerator.typeValidation = options.typeValidation;