Javascript vuejs数据属性未定义
我在vuejs实例中返回未定义属性，但在HTML中返回正确值时遇到问题Javascript vuejs数据属性未定义,javascript,vue.js,Javascript,Vue.js,我在vuejs实例中返回未定义属性，但在HTML中返回正确值时遇到问题 data: { ... userFilter: 'all', ... }, 警报将此.userFilter返回为未定义 filters: { all: function(tasks) { alert(this.userFilter); // This is undefined if(this.userFilter == 'all'){
data: {
...
userFilter: 'all',
...
},
filters: {
all: function(tasks) {
alert(this.userFilter); // This is undefined
if(this.userFilter == 'all'){
return tasks;
}else{
return tasks.filter(function(task){
return task.user_id == this.userFilter;
});
}
},
}
<select class="form-control" v-if="visibility == 'all'" v-model="userFilter">
<option selected value="all">Showing all users tasks</option>
<option v-for="user in users"
value="@{{user.id}}">
@{{user.first_name}} @{{user.last_name}}
</option>
</select>
var tasks = new Vue({
el: '#tasks',
data: {
tasks: [],
users: [],
newTask: { description: '', due_at: '', user_id: '', completed: false },
editingTask: false,
showAlert: false,
loading: true,
visibility: 'active',
validation: [],
showUser: null,
authUser: {}
},
ready: function() {
this.getAuthUser();
this.getTasks();
this.getUsers();
},
computed: {
filteredTasks: function () {
return this.$options.filters[this.visibility](this.tasks);
},
remaining: function() {
return this.tasks.filter(function(task){
return !task.completed && task.user_id == this.authUser.id;
}).length;
}
},
filters: {
all: function(tasks) {
return tasks;
},
active: function(tasks) {
return tasks.filter(function(task){
return !task.completed;
});
},
completed: function(tasks) {
return tasks.filter(function(task){
return task.completed;
});
},
groupByDate: function(tasks) {
var result = {};
for (var i = 0; i < tasks.length; i++) {
var task = tasks[i];
// Convert due_at date to be used as array key
var due_at = moment(task.due_at,'YYYY-MM-DD').format('DD-MM-YYYY');
if (result[due_at]) {
result[due_at].push(task);
} else {
result[due_at] = [task];
}
}
return result;
},
newDate: function(date) {
return moment(date, 'DD-MM-YYYY').format('LL');
},
usersFilter: function(tasks, user_id) {
if(this.visibility == 'all' && user_id){
return tasks.filter(function(task){
return task.user_id == user_id;
});
}else{
return tasks;
}
}
},
methods: {
getTasks: function () {
this.loading = true;
this.$http.get('api/tasks/'+ this.visibility).success(function(tasks) {
this.$set('tasks', tasks);
this.loading = false;
}).error(function(error) {
console.log(error);
});
},
getUsers: function() {
this.$http.get('api/users/all',function(users){
this.$set('users',users);
});
},
getAuthUser: function() {
this.$http.get('api/users/current-user').success(function(authUser) {
this.$set('authUser',authUser);
});
},
toggleVisibility: function(filter) {
this.visibility = filter;
this.getTasks();
},
open: function(e) {
e.preventDefault();
$('#add-task-modal').slideDown();
},
close: function(e) {
e.preventDefault();
$('#add-task-modal').slideUp();
},
toggleAlert: function(message) {
this.showAlert = true;
$('.alert').text(message);
$('.alert').fadeIn().delay(1000).fadeOut();
this.showAlert = false;
},
addTask: function(e) {
e.preventDefault();
if ( ! this.newTask) return;
var task = this.newTask;
this.$http.post('api/tasks', task)
.success(function(data){
task.id = data.task_id;
task.due_at = moment(task.due_at,'DD-MM-YYYY').format('YYYY-MM-DD');
if(this.visibility == 'all'){
this.tasks.push(task);
}else if(this.authUser.id == task.user_id){
this.tasks.push(task);
}
$('.datepicker').datepicker('clearDates');
this.validation = [];
this.newTask = { description: '', due_at: '', user_id: '', completed: '' };
this.$options.methods.toggleAlert('Task was added.');
})
.error(function(validation){
this.$set('validation', validation);
});
},
toggleTaskCompletion: function(task) {
task.completed = ! task.completed;
this.$http.post('api/tasks/complete-task/'+ task.id, task);
},
editTask: function(task) {
if(task.completed) return;
this.editingTask = task;
},
cancelEdit: function (todo) {
this.editingTask = false;
},
updateTask: function(task) {
task.description = task.description.trim();
this.$http.patch('api/tasks/'+ task.id, task);
this.$options.methods.toggleAlert('Task was updated.');
return this.editingTask = false;
},
deleteTask: function(due_at,task) {
if(confirm('Are you sure you want to remove this task?')){
this.tasks.$remove(task);
this.$http.delete('api/tasks/'+ task.id, task);
this.$options.methods.toggleAlert('Task was removed.');
}
}
},
directives: {
'task-focus': function (value) {
if (!value) {
return;
}
var el = this.el;
Vue.nextTick(function () {
el.focus();
});
}
}
})
var tasks=新的Vue({
el:'任务'，
数据：{
任务：[]，
用户：[]，
新任务：{description:''，到期日：''，用户id:''，已完成：false}，
编辑问：错，
showarert:false，
加载：对，
可见性：“活动”，
验证：[]，
showUser:null，
authUser:{}
},
就绪：函数（）{
这是.getAuthUser（）；
this.getTasks（）；
这是getUsers（）；
},
计算：{
filteredTasks:函数（）{
返回此.options.filters[this.visibility]（this.tasks）；
},
剩余：函数（）{
返回this.tasks.filter（函数（任务）{
return！task.completed&&task.user\u id==this.authUser.id；
}).长度；
}
},
过滤器：{
全部：功能（任务）{
返回任务；
},
活动：功能（任务）{
返回任务。筛选器（函数（任务）{
return！task.completed；
});
},
已完成：功能（任务）{
返回任务。筛选器（函数（任务）{
返回任务。已完成；
});
},
groupByDate:函数（任务）{
var result={}；
对于（变量i=0；i任务。$data。
var tasks = new Vue({
el: '#tasks',
data: {
tasks: [],
users: [],
newTask: { description: '', due_at: '', user_id: '', completed: false },
editingTask: false,
showAlert: false,
loading: true,
visibility: 'active',
validation: [],
showUser: null,
authUser: {}
},
ready: function() {
this.getAuthUser();
this.getTasks();
this.getUsers();
},
computed: {
filteredTasks: function () {
return this.$options.filters[this.visibility](this.tasks);
},
remaining: function() {
return this.tasks.filter(function(task){
return !task.completed && task.user_id == this.authUser.id;
}).length;
}
},
filters: {
all: function(tasks) {
return tasks;
},
active: function(tasks) {
return tasks.filter(function(task){
return !task.completed;
});
},
completed: function(tasks) {
return tasks.filter(function(task){
return task.completed;
});
},
groupByDate: function(tasks) {
var result = {};
for (var i = 0; i < tasks.length; i++) {
var task = tasks[i];
// Convert due_at date to be used as array key
var due_at = moment(task.due_at,'YYYY-MM-DD').format('DD-MM-YYYY');
if (result[due_at]) {
result[due_at].push(task);
} else {
result[due_at] = [task];
}
}
return result;
},
newDate: function(date) {
return moment(date, 'DD-MM-YYYY').format('LL');
},
usersFilter: function(tasks, user_id) {
if(this.visibility == 'all' && user_id){
return tasks.filter(function(task){
return task.user_id == user_id;
});
}else{
return tasks;
}
}
},
methods: {
getTasks: function () {
this.loading = true;
this.$http.get('api/tasks/'+ this.visibility).success(function(tasks) {
this.$set('tasks', tasks);
this.loading = false;
}).error(function(error) {
console.log(error);
});
},
getUsers: function() {
this.$http.get('api/users/all',function(users){
this.$set('users',users);
});
},
getAuthUser: function() {
this.$http.get('api/users/current-user').success(function(authUser) {
this.$set('authUser',authUser);
});
},
toggleVisibility: function(filter) {
this.visibility = filter;
this.getTasks();
},
open: function(e) {
e.preventDefault();
$('#add-task-modal').slideDown();
},
close: function(e) {
e.preventDefault();
$('#add-task-modal').slideUp();
},
toggleAlert: function(message) {
this.showAlert = true;
$('.alert').text(message);
$('.alert').fadeIn().delay(1000).fadeOut();
this.showAlert = false;
},
addTask: function(e) {
e.preventDefault();
if ( ! this.newTask) return;
var task = this.newTask;
this.$http.post('api/tasks', task)
.success(function(data){
task.id = data.task_id;
task.due_at = moment(task.due_at,'DD-MM-YYYY').format('YYYY-MM-DD');
if(this.visibility == 'all'){
this.tasks.push(task);
}else if(this.authUser.id == task.user_id){
this.tasks.push(task);
}
$('.datepicker').datepicker('clearDates');
this.validation = [];
this.newTask = { description: '', due_at: '', user_id: '', completed: '' };
this.$options.methods.toggleAlert('Task was added.');
})
.error(function(validation){
this.$set('validation', validation);
});
},
toggleTaskCompletion: function(task) {
task.completed = ! task.completed;
this.$http.post('api/tasks/complete-task/'+ task.id, task);
},
editTask: function(task) {
if(task.completed) return;
this.editingTask = task;
},
cancelEdit: function (todo) {
this.editingTask = false;
},
updateTask: function(task) {
task.description = task.description.trim();
this.$http.patch('api/tasks/'+ task.id, task);
this.$options.methods.toggleAlert('Task was updated.');
return this.editingTask = false;
},
deleteTask: function(due_at,task) {
if(confirm('Are you sure you want to remove this task?')){
this.tasks.$remove(task);
this.$http.delete('api/tasks/'+ task.id, task);
this.$options.methods.toggleAlert('Task was removed.');
}
}
},
directives: {
'task-focus': function (value) {
if (!value) {
return;
}
var el = this.el;
Vue.nextTick(function () {
el.focus();
});
}
}
})