angular/components

Radio-group's value not updated when the selected radio-button's value changes

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#9,808 建立於 2018年2月6日

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P4area: material/radiohelp wanted

描述

Bug, feature request, or proposal:

Bug

What is the expected behavior?

value input of MatRadioButton to update ngModel of MatRadioGroup when selected.

What is the current behavior?

MatRadioGroup's value updates but not the ngModel.

What are the steps to reproduce?

https://stackblitz.com/edit/radio-binding?file=app%2Fapp.component.html

What is the use-case or motivation for changing an existing behavior?

Custom radio option with input

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular and Material 5.0

Is there anything else we should know?

Calling radioGroup._controlValueAccessorChangeFn($event); on (ngModelChange) is a work around.

貢獻者指南

技術棧
angulartypescript
領域
frontend
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Angular fundamentalsAngular MaterialTypeScript
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
40
研究方向
Investigate the radio button and radio group component implementation, specifically how the value is propagated to ngModel. Look at the ` controlValueAccessorChangeFn` workaround and determine why it is needed. The fix likely involves ensuring the radio group's value change triggers the control value accessor change function properly. Consider adding a unit test for the scenario.