Join columns now have correct default type based upon association PK type

Default was integer, which led to casting errors returning the incorrect data

lib/associations/belongs-to.js

@@ -24,7 +24,9 @@ module.exports = (function() {
     var newAttributes  = {}
 
     this.identifier = this.options.foreignKey || Utils._.underscoredIf(Utils.singularize(this.target.tableName, this.target.options.language) + "Id", this.source.options.underscored)
-    newAttributes[this.identifier] = { type: this.options.keyType || DataTypes.INTEGER }
+    var targetKeys = Object.keys(this.target.primaryKeys)
+    var keyType = ((this.target.hasPrimaryKeys && targetKeys.length === 1) ? this.target.rawAttributes[targetKeys[0]].type : DataTypes.INTEGER)
+    newAttributes[this.identifier] = { type: this.options.keyType ||keyType }
     Helpers.addForeignKeyConstraints(newAttributes[this.identifier], this.target, this.source, this.options)
     Utils._.defaults(this.source.rawAttributes, newAttributes)
 

lib/associations/has-one.js

@@ -29,7 +29,9 @@ module.exports = (function() {
     var newAttributes = {}
 
     this.identifier = this.options.foreignKey || Utils._.underscoredIf(Utils.singularize(this.source.tableName, this.source.options.language) + "Id", this.options.underscored)
-    newAttributes[this.identifier] = { type: this.options.keyType || DataTypes.INTEGER }
+    var sourceKeys = Object.keys(this.source.primaryKeys)
+    var keyType = ((this.source.hasPrimaryKeys && sourceKeys.length === 1) ? this.source.rawAttributes[sourceKeys[0]].type : DataTypes.INTEGER)
+    newAttributes[this.identifier] = { type: this.options.keyType || keyType }
     Helpers.addForeignKeyConstraints(newAttributes[this.identifier], this.source, this.target, this.options)
     Utils._.defaults(this.target.rawAttributes, newAttributes)