Fix a belongsTo + hasMany relation incorrectly being identified as n:m. Closes #2159

lib/associations/has-many.js

@@ -69,7 +69,7 @@ module.exports = (function() {
      */
     else if (this.through) {
       _.each(this.target.associations, function (association, accessor) {
-        if (self.source === association.target) {
+        if (self.source === association.target && association.associationType === 'HasMany') {
           var paired = false
 
           // If through is default, we determine pairing by the accesor value (i.e. DAOFactory's using as won't pair, but regular ones will)