使用 Ember 数据上传文件 [英] File upload with Ember data

问题描述

有人可以提供有关使用 EmberJS 和 Ember Data 实现带有文件字段的表单的代码示例或文档吗?

Can someone provide code examples or documentation on implementing a form with a file field using EmberJS and Ember Data?

我已经熟悉 Ember Data，但我不确定如何正确实现文件上传.

I'm familiar with Ember Data already but I'm not sure how to implement file-uploads correctly.

推荐答案

这是我编写的用于文件上传的 ember-data 适配器的一部分(同一服务器 - 非跨域)

Here is part of an ember-data adapter I wrote to do file uploads (same server -not cross domain)

DS.DjangoRESTAdapter = DS.RESTAdapter.extend({
        bulkCommit: false,

        createRecord: function(store, type, record) {
            var root = this.rootForType(type), json = {};

            var data = new FormData();
            data.append('username', record.get('username'));
            data.append('attachment', record.get('attachment'));

            this.django_file_ajax('http://localhost:8000/people/new/', "POST", {
                data: data,
                context: this,
                success: function(pre_json) {
                    json[root] = pre_json;
                    this.didCreateRecord(store, type, record, json);
                }
            });
        },

        django_file_ajax: function(url, type, hash) {
            hash.url = url;
            hash.type = type;
            hash.contentType = false;
            hash.processData = false;
            hash.context = this;

            jQuery.ajax(hash);
        }

    });

})();

它不像 IE8 那样友好，因为我使用FormData"助手来进行分段文件上传，但它是一个很好的概念证明.

It's not IE8 friendly as is because I'm using the "FormData" helper to do multipart file upload but it's a good proof of concept.

这是带有上述适配器的余烬数据模型

Here is the ember-data model to go w/ the above adapter

PersonApp.Person = DS.Model.extend({
  id: DS.attr('number'),
  username: DS.attr('string'),
  attachment: DS.attr('string')
});

这是车把模板

<script type="text/x-handlebars" data-template-name="person">
{{view PersonApp.UploadFileView name="logo_image" contentBinding="content"}}
</script>

这是自定义余烬视图

PersonApp.PersonView = Ember.View.extend({
  templateName: 'person'
});

PersonApp.UploadFileView = Ember.TextField.extend({
    type: 'file',
    attributeBindings: ['name'],
    change: function(evt) {
      var self = this;
      var input = evt.target;
      if (input.files && input.files[0]) {
        var reader = new FileReader();
        var that = this;
        reader.onload = function(e) {
          var fileToUpload = e.srcElement.result;
          var person = PersonApp.Person.createRecord({ username: 'heyo', attachment: fileToUpload });
          self.get('controller.target').get('store').commit();
        }
        reader.readAsDataURL(input.files[0]);
      }
    }
});

如果你想看到一个完整的峰值，请查看我最近做的多文件上传示例.

If you want to see a full blown spike with this in action checkout a multi file upload example I did recently.

https://github.com/toranb/ember-file-upload

这篇关于使用 Ember 数据上传文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！