表单中的Angular 2回滚模型状态 [英] Angular 2 rollback model state in forms

问题描述

我在Angular 2中有一个绑定到模型的表格.现在，我希望在用户单击取消"时回滚模型中的更改.我该如何实现?

I have a form in Angular 2 which is bound to a model. Now I want the changes in the model to rollback when the user hits cancel. How do I achieve this?

推荐答案

我将重复评论中讨论的内容(因为我不喜欢SO的未回答问题)

I'll repeat what was discussed in the comments (because I don't like unanswered questions on SO):

• 对于许多用例，您可能可以使用与

• For many use cases, you can probably use something very similar to the RestoreService that is discussed in the Hierarchical Injectors dev guide.
• For the OP's particular case, where the model is bound to another component and live form changes need to be reflected in the other component, make a copy of your model before displaying the form. If the user cancels, revert to the copy, and notify the other component to use the copy also (i.e., send it the copy).

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