Javascript 将新项目添加到mongoose中的现有阵列

我在数据库e.I.[aaa，bbb，ccc]中有一个带有产品描述的数组，我想向数组中添加新项，如[aaa，bbb，ccc，ddd]，但我的代码没有向数组中添加新项，只是更改了现有数组，如[ddd]。 问题：为了向现有数组添加新项，我应该在代码中更改什么

<form name="editProduct.addForm" ng-submit="editProduct.addDescription(addDescription, editProduct.addForm.addDescription.$valid)" novalidate>
<div ng-class="{ 'has-success':(editProduct.addForm.addDescription.$valid && !editProduct.addForm.addDescription.$pristine), 'has-error':(!editProduct.addForm.addDescription.$valid && !editProduct.addForm.addDescription.$pristine) || (!addForm.addDescription.$valid && addForm.$submitted) }">
    <label><h4>Add description:</h4></label>
    <strong><input class="form-control" type="text" name="addDescription" ng-model="addDescription" placeholder="Add description" required></strong>
</div>
<br>
<button ng-disabled="editProduct.disabled" class="btn btn-primary add-des" type="submit">Save</button>
</form>  

index.html

<form name="editProduct.addForm" ng-submit="editProduct.addDescription(addDescription, editProduct.addForm.addDescription.$valid)" novalidate>
<div ng-class="{ 'has-success':(editProduct.addForm.addDescription.$valid && !editProduct.addForm.addDescription.$pristine), 'has-error':(!editProduct.addForm.addDescription.$valid && !editProduct.addForm.addDescription.$pristine) || (!addForm.addDescription.$valid && addForm.$submitted) }">
    <label><h4>Add description:</h4></label>
    <strong><input class="form-control" type="text" name="addDescription" ng-model="addDescription" placeholder="Add description" required></strong>
</div>
<br>
<button ng-disabled="editProduct.disabled" class="btn btn-primary add-des" type="submit">Save</button>
</form>  

---

您可以使用$push运算符将新项推送到如下数组-

<form name="editProduct.addForm" ng-submit="editProduct.addDescription(addDescription, editProduct.addForm.addDescription.$valid)" novalidate>
<div ng-class="{ 'has-success':(editProduct.addForm.addDescription.$valid && !editProduct.addForm.addDescription.$pristine), 'has-error':(!editProduct.addForm.addDescription.$valid && !editProduct.addForm.addDescription.$pristine) || (!addForm.addDescription.$valid && addForm.$submitted) }">
    <label><h4>Add description:</h4></label>
    <strong><input class="form-control" type="text" name="addDescription" ng-model="addDescription" placeholder="Add description" required></strong>
</div>
<br>
<button ng-disabled="editProduct.disabled" class="btn btn-primary add-des" type="submit">Save</button>
</form>  

Product.findOneAndUpdate(
{ _id: editProduct }, 
{ $push: {
    description: addDescription
}}, options, function(err, product){

});

---

您可以使用$push运算符将新项推送到如下数组-

<form name="editProduct.addForm" ng-submit="editProduct.addDescription(addDescription, editProduct.addForm.addDescription.$valid)" novalidate>
<div ng-class="{ 'has-success':(editProduct.addForm.addDescription.$valid && !editProduct.addForm.addDescription.$pristine), 'has-error':(!editProduct.addForm.addDescription.$valid && !editProduct.addForm.addDescription.$pristine) || (!addForm.addDescription.$valid && addForm.$submitted) }">
    <label><h4>Add description:</h4></label>
    <strong><input class="form-control" type="text" name="addDescription" ng-model="addDescription" placeholder="Add description" required></strong>
</div>
<br>
<button ng-disabled="editProduct.disabled" class="btn btn-primary add-des" type="submit">Save</button>
</form>  

Product.findOneAndUpdate(
{ _id: editProduct }, 
{ $push: {
    description: addDescription
}}, options, function(err, product){

});

---

谢谢，效果很好，但如果我有一个项目，这是一个对象，$push不起作用，但是可以将ogject更改为数组吗？如果您想一次推送多个描述，请尝试此-``如果您想一次推送多个描述，请尝试此-`Product.findOneAndUpdate（{u id:editProduct}，{$push:{description:{$each:descriptionList}}，选项，函数（err，product）{}一次，试试这个-``如果你想一次推送多个描述，试试这个-`Product.findOneAndUpdate（{{u id:editProduct}，{$push:{$description:{$each:descriptionList}}}，选项，函数（err，Product）{}）“非常感谢您的回答，您的解决方案很好，但我还有最后一个问题，您能看看这个问题吗？我不知道如何在单击时删除此项，