fix nested $operators in $all

closes #670

lib/schema/array.js

@@ -161,11 +161,23 @@ SchemaArray.prototype.$conditionalHandlers = {
       if (!Array.isArray(val)) {
         val = [val];
       }
+
+      val = val.map(function (v) {
+        if (v && 'Object' === v.constructor.name) {
+          var o = {};
+          o[this.path] = v;
+          var query = new Query(o);
+          query.cast(this.casterConstructor);
+          return query._conditions[this.path];
+        }
+        return v;
+      }, this);
+
       return this.castForQuery(val);
     }
   , '$elemMatch': function (val) {
       var query = new Query(val);
-      query.cast(this.casterConstructor)
+      query.cast(this.casterConstructor);
       return query._conditions;
     }
   , '$size': function (val) {

test/model.querying.test.js

@@ -1370,6 +1370,31 @@ module.exports = {
     });
   },
 
+  'find using #all with nested #elemMatch': function () {
+    var db = start()
+      , P = db.model('BlogPostB', collection);
+
+    var post = new P({ title: "nested elemMatch" });
+    post.comments.push({ title: 'comment A' }, { title: 'comment B' }, { title: 'comment C' })
+
+    var id0 = post.comments[0]._id;
+    var id1 = post.comments[1]._id;
+    var id2 = post.comments[2]._id;
+
+    post.save(function (err) {
+      should.strictEqual(null, err);
+
+      var query0 = { $elemMatch: { _id: id1, title: 'comment B' }};
+      var query1 = { $elemMatch: { _id: id2.toString(), title: 'comment C' }};
+
+      P.findOne({ comments: { $all: [query0, query1] }}, function (err, p) {
+        db.close();
+        should.strictEqual(null, err);
+        p.id.should.equal(post.id);
+      });
+    });
+  },
+
   'test finding documents where an array of a certain $size': function () {
     var db = start()
       , BlogPostB = db.model('BlogPostB', collection);