Fix foreign key type inference

Fixes #852 and #1130

lib/associations/has-many.js

@@ -209,7 +209,7 @@ module.exports = (function() {
     } else {
       var newAttributes = {}
       var constraintOptions = _.clone(this.options) // Create a new options object for use with addForeignKeyConstraints, to avoid polluting this.options in case it is later used for a n:m
-      newAttributes[this.identifier] = { type: this.options.keyType || this.target.rawAttributes[this.target.primaryKeyAttribute].type }
+      newAttributes[this.identifier] = { type: this.options.keyType || this.source.rawAttributes[this.source.primaryKeyAttribute].type }
 
       if (this.options.constraints !== false) {
         constraintOptions.onDelete = constraintOptions.onDelete || 'SET NULL'

test/associations/has-many.test.js

@@ -1732,5 +1732,24 @@ describe(Support.getTestDialectTeaser("HasMany"), function() {
         })
       })
     })
+
+    it('infers the keyType if none provided', function(done) {
+      var User = this.sequelize.define('User', {
+        id: { type: DataTypes.STRING, primaryKey: true },
+        username: DataTypes.STRING
+      })
+      , Task = this.sequelize.define('Task', {
+        title: DataTypes.STRING
+      })
+
+      User.hasMany(Task)
+
+      this.sequelize.sync({ force: true }).success(function() {
+        expect(Task.rawAttributes.UserId.type)
+          .to.equal(DataTypes.STRING)
+
+        done()
+      })
+    })
   })
 })