Allow querying for null values (#47)

src/utils.js

@@ -46,7 +46,7 @@ export function getWhere(query) {
 
   Object.keys(where).forEach(prop => {
     let value = where[prop];
-    if(value.$nin) {
+    if(value && value.$nin) {
       value = Object.assign({}, value);
 
       value.$notIn = value.$nin;

test/index.test.js

@@ -1,5 +1,6 @@
 // jshint expr:true
 
+import assert from 'assert';
 import { expect } from 'chai';
 import { base, orm, example } from 'feathers-service-tests';
 import Sequelize from 'sequelize';
@@ -74,6 +75,17 @@ describe('Feathers Sequelize Service', () => {
       });
     });
 
+    it('allows querying for null values (#45)', done => {
+      const name = 'Null test';
+      people.create({ name }).then(person =>
+        people.find({ query: { age: null } }).then(people => {
+          assert.equal(people.length, 1);
+          assert.equal(people[0].name, name);
+          assert.equal(people[0].age, null);
+        }).then(() => people.remove(person.id))
+      ).then(() => done()).catch(done);
+    });
+
     base(people, _ids, errors);
   });
 });