From 88aa6a92d11da0558cb519aa12e061c4507e3979 Mon Sep 17 00:00:00 2001
From: Nicolai Moraru <dot.nick.dot.messing@gmail.com>
Date: Wed, 26 Jul 2017 13:09:16 +1200
Subject: [PATCH 1/2] fix($compiler): Allow using array value with array
 v-model in imput[type="checkbox"]

#6219
---
 .../web/compiler/directives/model.js          |  2 +-
 .../directives/model-checkbox.spec.js         | 28 +++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/platforms/web/compiler/directives/model.js b/src/platforms/web/compiler/directives/model.js
index 8f5951eac56..825c8200267 100644
--- a/src/platforms/web/compiler/directives/model.js
+++ b/src/platforms/web/compiler/directives/model.js
@@ -93,7 +93,7 @@ function genCheckboxModel (
     'if(Array.isArray($$a)){' +
       `var $$v=${number ? '_n(' + valueBinding + ')' : valueBinding},` +
           '$$i=_i($$a,$$v);' +
-      `if($$el.checked){$$i<0&&(${value}=$$a.concat($$v))}` +
+      `if($$el.checked){$$i<0&&(${value}=$$a.concat(Array.isArray($$v)?[$$v]:$$v))}` +
       `else{$$i>-1&&(${value}=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}` +
     `}else{${genAssignmentCode(value, '$$c')}}`,
     null, true
diff --git a/test/unit/features/directives/model-checkbox.spec.js b/test/unit/features/directives/model-checkbox.spec.js
index 2c296ccbf5a..e102af62609 100644
--- a/test/unit/features/directives/model-checkbox.spec.js
+++ b/test/unit/features/directives/model-checkbox.spec.js
@@ -161,6 +161,34 @@ describe('Directive v-model checkbox', () => {
     }).then(done)
   })
 
+  it('bind to Array value with array value bindings (object loose equal)', done => {
+    const vm = new Vue({
+      data: {
+        test: [{ a: 1 }]
+      },
+      template: `
+        <div>
+          <input type="checkbox" v-model="test" :value="{ a: 1 }">
+          <input type="checkbox" v-model="test" :value="[2]">
+        </div>
+      `
+    }).$mount()
+    document.body.appendChild(vm.$el)
+    expect(vm.$el.children[0].checked).toBe(true)
+    expect(vm.$el.children[1].checked).toBe(false)
+    vm.$el.children[0].click()
+    expect(vm.test.length).toBe(0)
+    vm.$el.children[1].click()
+    expect(vm.test).toEqual([[2]])
+    vm.$el.children[0].click()
+    expect(vm.test).toEqual([[2], { a: 1 }])
+    vm.test = [{ a: 1 }]
+    waitForUpdate(() => {
+      expect(vm.$el.children[0].checked).toBe(true)
+      expect(vm.$el.children[1].checked).toBe(false)
+    }).then(done)
+  })
+
   it('.number modifier', () => {
     const vm = new Vue({
       data: {

From e25d78f04da1c149a8dc900c8d038006b5eb10d8 Mon Sep 17 00:00:00 2001
From: Nicolai Moraru <dot.nick.dot.messing@gmail.com>
Date: Wed, 26 Jul 2017 22:45:48 +1200
Subject: [PATCH 2/2] refactor($compile): Remove unnecesarry ternary

---
 src/platforms/web/compiler/directives/model.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/platforms/web/compiler/directives/model.js b/src/platforms/web/compiler/directives/model.js
index 825c8200267..7c662629b65 100644
--- a/src/platforms/web/compiler/directives/model.js
+++ b/src/platforms/web/compiler/directives/model.js
@@ -93,7 +93,7 @@ function genCheckboxModel (
     'if(Array.isArray($$a)){' +
       `var $$v=${number ? '_n(' + valueBinding + ')' : valueBinding},` +
           '$$i=_i($$a,$$v);' +
-      `if($$el.checked){$$i<0&&(${value}=$$a.concat(Array.isArray($$v)?[$$v]:$$v))}` +
+      `if($$el.checked){$$i<0&&(${value}=$$a.concat([$$v]))}` +
       `else{$$i>-1&&(${value}=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}` +
     `}else{${genAssignmentCode(value, '$$c')}}`,
     null, true