Laravel 中使用 Vue.js 实现基于 Ajax 的表单提交错误验证操作

Route::get('post/create', 'PostController@create');
Route::post('post/save', 'PostController@save');

php artisan make:controller PostController

public function create() {
  return view('post.create');
}
public function save(Request $request) {
  // 设置验证规则
  $this->validate($request, [
     'title' => 'required',
     'body' => 'required'
   ]);
}

php artisan make:auth

@extends('layouts.app')
@section('content')
  <div class="container">
    <!--创建成功显示消息-->
    <div class="alert alert-success" v-if="submitted">
      创建成功!
    </div>
    <!--页面提交之后阻止刷新-->
    <form @submit.prevent="createPost" method="POST">
      <legend>创建文章</legend>
      <!--如果title字段验证失败则添加.has-error-->
      <div class="form-group" :class="{'has-error':errors.title}">
        <label>文章标题</label>
        <input type="text" name="title" class="form-control" v-model="post.title" value="{{ old('title') }}">
        <!--如果验证失败通过FormError组件显示错误信息-->
        <form-error v-if="errors.title" :errors="errors">
          @{{errors.title.join(',')}}
        </form-error>
      </div>
      <!--如果body字段验证失败则添加.has-error-->
      <div class="form-group" :class="{'has-error':errors.body}">
        <label>文章正文</label>
        <textarea name="body" class="form-control" rows="5" v-model="post.body">{{ old('body') }}</textarea>
        <!--如果验证失败通过FormError组件显示错误信息-->
        <form-error v-if="errors.body" :errors="errors">
          @{{errors.body.join(',')}}
        </form-error>
      </div>
      <button type="submit" class="btn btn-primary">创建文章</button>
    </form>
  </div>
@endsection

var app = new Vue({
  el: '#app',
  data: {
    post: {
      title: '',
      body: ''
    },
    errors: [],
    submitted: false
  },
  methods: {
    createPost: function () {
      var self = this;
      axios.post('/post/save', self.post).then(function(response) {
        // form submission successful, reset post data and set submitted to true
        self.post = {
          title: '',
          body: '',
        };
        // clear previous form errors
        self.errors = '';
        self.submitted = true;
      }).catch(function (error) {
        // form submission failed, pass form errors to errors array
        self.errors = error.response.data;
      });
    }
  }
});

<template>
  <span class="help-block">
    <slot></slot>
  </span>
</template>
<script>
  export default {
    props: ['errors']
  }
</script>

Vue.component('form-error', require('./components/FormError.vue'));

npm run dev