Question

我正在尝试为表单中的某些元素设置默认值，虽然它适用于所有输入字段，但它似乎不适用于textarea，而代码几乎相同。

表单的HTML：

<form class="form-horizontal" id="infoForm" name="form" ng-submit="ctrl.submitInfoForm(form)" novalidate>
    <div class="form-group">
        <label for="inputEditName">Name</label>
        <input type="text" class="form-control" value="{{ctrl.viewedName}}" id="inputEditName" ng-model="viewUser.name">
    </div>
    <div class="form-group">
        <label for="inputEditLocation">Location</label>
        <input type="text" class="form-control" value="{{ctrl.viewedLocation}}" id="inputEditLocation" ng-model="viewUser.location">
    </div>
    <div class="form-group">
        <label for="inputEditWebsite">Website</label>
        <input type="text" class="form-control" value="{{ctrl.viewedWebsite}}" id="inputEditWebsite" ng-model="viewUser.website">
    </div>
    <div class="form-group">
        <label for="inputEditBio">Bio</label>
        <textarea rows="3" class="form-control" id="inputEditBio" ng-model="viewUser.bio" >{{ctrl.viewedBio}}</textarea>
    </div>
    <button type="submit" class="btn btn-default">Save Changes</button>
</form>

ProfileController.js的相关部分：

var vm = this;
vm.getViewedName = getViewedName;
vm.getViewedLocation = getViewedLocation;
vm.getViewedWebsite = getViewedWebsite;
vm.getViewedBio = getViewedBio;
vm.viewedName = getViewedName();
vm.viewedLocation = getViewedLocation();
vm.viewedWebsite = getViewedWebsite();
vm.viewedBio = getViewedBio();

function getViewedName() {
    if (vm.viewedName === undefined) {
        var viewedName;
        var viewedUser = UserService2.getViewedUser();
        viewedName = viewedUser.name;
        if (viewedName === "") {
            viewedName = "-";
        }
        return viewedName;
    } else {
        return vm.viewedName;
    }
}

function getViewedLocation() {
    if (vm.viewedLocation === undefined) {
        var viewedLocation;
        var viewedUser = UserService2.getViewedUser();
        viewedLocation = viewedUser.location;
        if (viewedLocation === "") {
            viewedLocation = "-";
        }
        return viewedLocation;
    } else {
        return vm.viewedLocation;
    }
}

function getViewedWebsite() {
    if (vm.viewedWebsite === undefined) {
        var viewedWebsite;
        var viewedUser = UserService2.getViewedUser();
        viewedWebsite = viewedUser.website;
        if (viewedWebsite === "") {
            viewedWebsite = "-";
        }
        return viewedWebsite;
    } else {
        return vm.viewedWebsite;
    }
}

function getViewedBio() {
    if (vm.viewedBio === undefined) {
        var viewedBio;
        var viewedUser = UserService2.getViewedUser();
        viewedBio = viewedUser.bio;
        if (viewedBio === "") {
            viewedBio = "-";
        }
        return viewedBio;
    } else {
        return vm.viewedBio;
    }
}

默认情况下，只设置名称，所以此时它看起来像这样：

姓名：myname 地点： - 网站： - 生物：

Answer 1

来自Docs：

ngModel将尝试通过评估当前范围上的表达式绑定到给定的属性。如果该范围上尚不存在该属性，则将隐式创建该属性并将其添加到范围中。

因此，在你的Case中，angular正试图将Textarea绑定到viewUser.bio属性。由于它不存在，它将使用空值创建它，然后“覆盖”您在html中提供的ctrl.viewedBio。

解决问题的简单方法：

在您的Controller中（在Init函数或类似的东西中......）

vm.viewUser.bio = vm.viewedBio

Answer 2

我发现了我做错了什么。

首先，我有一个ngModel和一个控制器的字段附加到textarea（以及其他输入），所以我删除了字段，现在我只是使用ngModel。

其次，我忘了把ctrl。在我的ngModel属性中。我通过简单地添加ctrl来改变。到我的ngModel属性。

所以我已经改变了一切，它现在有效，看起来像这样：

HTML：

<form class="form-horizontal" id="infoForm" name="form" ng-submit="ctrl.submitInfoForm(form)" novalidate>
    <div class="form-group">
        <label for="inputEditName">Name</label>
        <input type="text" class="form-control" id="inputEditName" ng-model="ctrl.viewUser.name">
    </div>
    <div class="form-group">
        <label for="inputEditLocation">Location</label>
        <input type="text" class="form-control" id="inputEditLocation" ng-model="ctrl.viewUser.location">
    </div>
    <div class="form-group">
        <label for="inputEditWebsite">Website</label>
        <input type="text" class="form-control" id="inputEditWebsite" ng-model="ctrl.viewUser.website">
    </div>
    <div class="form-group">
        <label for="inputEditBio">Bio</label>
        <textarea rows="3" class="form-control" id="inputEditBio" ng-model="ctrl.viewUser.bio" ></textarea>
    </div>
    <button type="submit" class="btn btn-default">Save Changes</button>
</form>

ProfileController.js：

var vm = this;
vm.getViewedUser = getViewedUser;
vm.viewUser = getViewedUser();


function getViewedUser() {
    if (vm.viewUser === undefined) {
        vm.viewUser = UserService2.getViewedUser();
        if (vm.viewUser.name === "") {
            vm.viewUser.name = "-";
        }
        if (vm.viewUser.location === "") {
            vm.viewUser.location = "-";
        }
        if (vm.viewUser.website === "") {
            vm.viewUser.website = "-";
        }
        if (vm.viewUser.bio === "") {
            vm.viewUser.bio = "-";
        }
        return vm.viewUser;
    } else {
        return vm.viewUser;
    }
}

虽然Founded1898的答案和Vinod Louis的评论有所帮助，但我觉得这些并没有完全回答我的问题，而这就是我添加这个答案的原因。

AngularJS无法设置值textarea

2 个答案: