feat(query): add PoC for runSetters option

Re: #4569

Author: vkarpov15

lib/schema.js

@@ -689,6 +689,10 @@ Schema.interpretAsType = function(path, obj, options) {
         'You can only nest using refs or arrays.');
   }
 
+  obj = utils.clone(obj);
+  if (!('runSetters' in obj)) {
+    obj.runSetters = options.runSetters;
+  }
   return new MongooseTypes[name](path, obj);
 };
 

lib/schema/string.js

@@ -506,6 +506,9 @@ SchemaString.prototype.castForQuery = function($conditional, val) {
   if (Object.prototype.toString.call(val) === '[object RegExp]') {
     return val;
   }
+  if (this.options && this.options.runSetters) {
+    return this.applySetters(val, null);
+  }
   return this.cast(val);
 };
 

test/model.query.casting.test.js

@@ -1021,6 +1021,26 @@ describe('model query casting', function() {
       catch(done);
   });
 
+  it('lowercase in query (gh-4569)', function(done) {
+    var db = start();
+
+    var testSchema = new Schema({
+      name: { type: String, lowercase: true }
+    }, { runSetters: true });
+
+    var Test = db.model('gh-4569', testSchema);
+    Test.create({ name: 'val' }).
+      then(function() {
+        return Test.findOne({ name: 'VAL' });
+      }).
+      then(function(doc) {
+        assert.ok(doc);
+        assert.equal(doc.name, 'val');
+        done();
+      }).
+      catch(done);
+  });
+
   it('_id = 0 (gh-4610)', function(done) {
     var db = start();