use deep equal for equality checking objects

lib/adapter/adapters/common.js

@@ -1,6 +1,8 @@
+import deepEqual from 'deep-equal'
 import { toBuffer } from 'array-buffer'
 import * as keys from '../../common/keys'
 import { BadRequestError } from '../../common/errors'
+import deepEqualOptions from '../../common/deep_equal_options'
 
 
 export function applyOptions (count, fields, records, options) {
@@ -46,7 +48,7 @@ export function applyOptions (count, fields, records, options) {
 const matchCheck = new WeakMap([
   [ Date, (a, b) => a.getTime() === b.getTime() ],
   [ Buffer, (a, b) => a.equals(toBuffer(b)) ],
-  [ Object, () => false ]
+  [ Object, (a, b) => deepEqual(a, b, deepEqualOptions) ]
 ])
 
 
@@ -74,6 +76,7 @@ function matchByField (fields, match, record) {
 }
 
 
+// For comparing sort order.
 const comparisons = new WeakMap([
   [ Number, (a, b) => a - b ],
   [ String, (a, b) => a < b ? -1 : a > b ? 1 : 0 ],

lib/common/deep_equal_options.js

@@ -0,0 +1 @@
+export default { strict: true }

lib/dispatch/update.js

@@ -8,6 +8,7 @@ import * as methods from '../common/methods'
 import * as keys from '../common/keys'
 import { NotFoundError, BadRequestError } from '../common/errors'
 import { find, includes } from '../common/array_proxy'
+import deepEqualOptions from '../common/deep_equal_options'
 
 
 /**
@@ -61,7 +62,7 @@ export default function (context) {
     return Promise.resolve(transform && transform.input ?
       transform.input(context, clone(record), update) : update)
     .then(update => {
-      if (!deepEqual(update, cloneUpdate, { strict: true }))
+      if (!deepEqual(update, cloneUpdate, deepEqualOptions))
         context.response.updateModified = true
 
       transformedUpdates.push(update)