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Just use ng-checked.

<label class="radio-inline">
  <input name="display" type="radio" value="true" ng-model="institution.display" ng-checked="true" required>
    顯示
</label>
<label class="radio-inline">
  <input name="display" type="radio" value="false" ng-model="institution.display">
  隱藏
</label>

Set the value of

institution.display to the corresponding

checked = "checked"

ng-checked  

Just add the ng-model binding element at the same time

Two-way binding
Two-way binding
Two-way binding
It’s important to say it three times~~~

$scope.institution.display = "true";

That is, ng-model and value can be the same.

can be found in ng-repeat 中使用 ng-checked , in the form:

<label ng-repeat="(key, val) in genders track by $index">
    <input type="radio" name="gender" value="{{key}}" ng-checked="list.gender==key">{{val}}
</label>