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Form update uses incorrect target on reconnect

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
30/100
Issue 类型
缺陷
描述清晰度
需要澄清
活跃度
停滞
技术栈
elixir
领域
backend

调研方向

Start by creating the simplified reproducible project described in the issue, using Surface v0.6.1, LiveView v0.16.4, and the shown component hierarchy. Trace reconnect handling and the handle_event/3 target resolution while the tab is backgrounded; done means reconnecting no longer repeatedly calls MyLiveComponent.handle_event/3 instead of the LiveView handler.

由索引模型根据 Issue 内容生成。

描述

I have a component hierarchy that looks something like this:

MyLiveView
  -> MyLiveComponent
    -> MyFormComponent
      -> <Surface.Components.Form change={"update", target: :live_view} ... />

This works great on the golden path, handle_event/3 is called on the LiveView as expected.

However, if the tab has to reconnect to my app while the tab is in the background, such as in the following scenarios:

  1. Put the tab in the background (i.e. open some other tab as the active tab)
  2. Restart the server

or

  1. Put the tab in the background (i.e. open some other tab as the active tab)
  2. Close computer (goes to sleep)
  3. Open computer later

My app tab (which is not the active tab in Chrome) will reconnect and attempt to call handle_event on MyLiveComponent instead of on MyLiveView, over and over again, indefinitely.

The (redacted) error I see in my console is:

** (UndefinedFunctionError) function MyLiveComponent.handle_event/3 is undefined or private

If I then click on the tab and make it the active tab, it seems to do something slightly different and is able to re-establish the correct target and figure it out.

I wasn't sure if this was a dev-only issue, but I recently launched to the public and found that it indeed affects production as well, as AppSignal is showing 1,800 errors per hour, per user.

I'm going to work on making a simplified, reproducible project once I have a minute, but I'm not familiar with the internals of Surface or LiveView and wondered if anyone had any feedback on where I might start looking for the problem, or a workaround.

Surface: v0.6.1
LiveView: v0.16.4
Elixir: v1.12.2
Chrome: 96.0.4664.110

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Elixir
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派生
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PR 合并指标
30 天内没有已合并 PR

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从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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