Fix default options for router

Author: typicode

__tests__/server/plural-fake.js

@@ -12,12 +12,29 @@ describe('Fake server', () => {
 
     db.posts = [{ id: 1, body: 'foo' }, { id: 2, body: 'bar' }]
 
+    db.comments = [
+      { id: 1, body: 'foo', published: true, postId: 1, userId: 1 },
+      { id: 2, body: 'bar', published: false, postId: 1, userId: 2 },
+      { id: 3, body: 'baz', published: false, postId: 2, userId: 1 },
+      { id: 4, body: 'qux', published: true, postId: 2, userId: 2 },
+      { id: 5, body: 'quux', published: false, postId: 2, userId: 1 }
+    ]
+
     server = jsonServer.create()
     router = jsonServer.router(db, { _isFake: true })
     server.use(jsonServer.defaults())
     server.use(router)
   })
 
+  describe('GET /:parent/:parentId/:resource', () => {
+    test('should respond with json and corresponding nested resources', () =>
+      request(server)
+        .get('/posts/1/comments')
+        .expect('Content-Type', /json/)
+        .expect([db.comments[0], db.comments[1]])
+        .expect(200))
+  })
+
   describe('POST /:resource', () => {
     test('should not create a resource', async () => {
       await request(server)

src/server/router/index.js

@@ -12,7 +12,9 @@ const nested = require('./nested')
 const singular = require('./singular')
 const mixins = require('../mixins')
 
-module.exports = (db, opts = { foreignKeySuffix: 'Id', _isFake: false }) => {
+module.exports = (db, opts) => {
+  opts = Object.assign({ foreignKeySuffix: 'Id', _isFake: false }, opts)
+
   if (typeof db === 'string') {
     db = low(new FileSync(db))
   } else if (!_.has(db, '__chain__') || !_.has(db, '__wrapped__')) {