Question

我正在使用自定义类型构建Drive Realtime项目：https://developers.google.com/google-apps/realtime/custom-objects。

我遇到的问题是我的自定义对象中的字段未在model.toJson（）输出中导出。我确定我只是遗漏了一些东西，但我还没有找到与构建自定义对象与实时游乐场或实时API文档的方式有任何区别。

使用实时游乐场的示例repro案例如下。

1）去实时游乐场：https://realtimeplayground.appspot.com/ 2）打开开发者控制台 3）运行以下代码

test = function () {}
test.prototype = { init: function() { this.name = 'testName';}};
test.prototype.name = gapi.drive.realtime.custom.collaborativeField('name');
gapi.drive.realtime.custom.registerType(test, 'testType')
gapi.drive.realtime.custom.setInitializer(test, test.prototype.init);
var model = window.doc.getModel()
model.getRoot().set('myTest', model.create(test));
model.toJson()

观察输出：

"{"id":"root","type":"Map","value":
  {"demo_string":
    {"id":"Tq50c9iybcXi","type":"EditableString","value":"Edit Me!"},
   "demo_list":{"id":"ZmjclOeUbcXj","type":"List","value":
     [{"json":"Cat"},{"json":"Dog"},{"json":"Sheep"},{"json":"Chicken"}]},
   "demo_cursors":{"id":"6TJ6Zzd2bcXj","type":"Map","value":{}},
   "demo_map":{"id":"ukRRMPHbbcXj","type":"Map","value":
     {"key1":{"json":"value 1"},"key2":{"json":"value 2"},"key3":{"json":"value 3"}}},
   "demo_custom":{"id":"44nsuMAPbcXk","type":"DemoMovie","value":
     {"name":{"json":"Minority Report"},
      "director":{"json":"Steven Spielberg"},
      "notes":{"json":""},"rating":{"json":""}}},
   "myTest":{"id":"Kq4hcV4UbcvW","type":"testType","value":{}}}}"

预期：

"{"id":"root","type":"Map","value":
  {"demo_string":
    {"id":"Tq50c9iybcXi","type":"EditableString","value":"Edit Me!"},
   "demo_list":{"id":"ZmjclOeUbcXj","type":"List","value":
     [{"json":"Cat"},{"json":"Dog"},{"json":"Sheep"},{"json":"Chicken"}]},
   "demo_cursors":{"id":"6TJ6Zzd2bcXj","type":"Map","value":{}},
   "demo_map":{"id":"ukRRMPHbbcXj","type":"Map","value":
     {"key1":{"json":"value 1"},"key2":{"json":"value 2"},"key3":{"json":"value 3"}}},
   "demo_custom":{"id":"44nsuMAPbcXk","type":"DemoMovie","value":
     {"name":{"json":"Minority Report"},
      "director":{"json":"Steven Spielberg"},
      "notes":{"json":""},"rating":{"json":""}}},
   "myTest":{"id":"Kq4hcV4UbcvW","type":"testType","value":{"json":"testName"}}}}}"

Answer 1

注册自定义类型只能在＆＃34; Pre-Load＆＃34;文档生命周期的阶段。您的代码是正确的，但正在>文档加载后的文档上执行。这会导致自定义对象无法正确构造，这就是为什么它缺少您在init函数中指定的JSON值。

要查看正确的流程，请在Realtime Playground应用程序中的static / elements / playground-app.js的第88行放置一个断点。刷新页面，当执行暂停时，从控制台运行此代码：

test = function () {} test.prototype = { init: function() { this.name = 'testName';}}; test.prototype.name = gapi.drive.realtime.custom.collaborativeField('name'); gapi.drive.realtime.custom.registerType(test, 'testType') gapi.drive.realtime.custom.setInitializer(test, test.prototype.init);

恢复执行。当应用程序完全加载后，运行其余代码：

var model = window.doc.getModel() model.getRoot().set('myTest', model.create(test)); model.toJson()

您将看到输出的JSON符合您的预期：

"myTest":{"id":"1OiQd2QoEqBs","type":"testType","value":{"name":{"json":"testName"}}}

此工作流程记录在＆＃34;注册自定义类型和字段＆＃34; Custom Collaborative Objects指南的标题。

驱动实时api模型toJson不填充自定义类型的字段

1 个答案: