javascript - ReactJS ajax 响应在组件中呈现错误

Question

我想在“FormError”组件中调用 ajax 后呈现 json 响应错误。

我的错误组件如下所示:

var FormError = React.createClass({
    render: function () {
        return (
            <span className="form-error"></span>
        );
    }
});

我的表格:

var EmailForm = React.createClass({
    getInitialState: function(){
      return {
          password:'',
          email: ''
      };
    },

    componentDidMount: function() {
        this.serverRequest = $.get('/accounts/email-form/', function (result) {
          var userInfo = result;
          this.setState({
            email: userInfo.email
          });
        }.bind(this));
    },

    submit: function (e){
      var self;

      e.preventDefault()
      self = this;

      console.log(this.state);

      var data = {
        password: this.state.password,
        email: this.state.email,
        CSRF: csrftoken
      };

      // Submit form via jQuery/AJAX
      function csrfSafeMethod(method) {
            // these HTTP methods do not require CSRF protection
            return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
      }
      $.ajaxSetup({
            beforeSend: function(xhr, settings) {
                if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
                    xhr.setRequestHeader("X-CSRFToken", csrftoken);
                }
            }
      });
      $.ajax({
        type: 'POST',
        url: '/accounts/email-form/',
        data: data
      })
      .done(function(data) {
        toastr.success('Profile updated');
      })
      .fail(function(jqXhr) {
        toastr.error('There is some errors in your request');
      });

    },

    passwordChange: function(e){
      this.setState({password: e.target.value});
    },

    emailChange: function(e){
     this.setState({email: e.target.value});
    },

    render: function() {
        return (
            <form onSubmit={this.submit}>
                <div className="form-half">
                    <label htmlFor="password" className="input-label">Current Password</label>
                    <BasicInputPassword valChange={this.passwordChange} val={this.state.password}/>
                    <FormError/>
                </div>
                <div className="form-half">
                    <label htmlFor="lastname" className="input-label">New email</label>
                    <BasicInput valChange={this.emailChange} val={this.state.email}/>
                    <FormError/>
                </div>
                 <button type="submit" className="button secondary" >Submit</button>
            </form>
        );
    }
});

此代码有效，ajax 调用给我返回带有错误的 json

{"email":["Email already exists."],"password":["This field may not be blank."]}

但我不知道如何将此错误附加到我的代码和 react 组件中。

Answer 1

有一个单独的错误状态变量，每次 json 响应包含错误时，更新该变量。然后，例如，您可以使用此条件向用户显示详细信息(如果没有错误，则将错误显示为空数组):

{this.state.errors.length != 0 && ... // traverse them and show details