如何从Firestore中的数组删除对象 [英] How to delete object from array in firestore
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问题描述
我在从firestore
中的Array
中删除Object
时遇到问题.
我在Firestore中有以下数据:
I have a problem with deleting an Object
out of an Array
in firestore
.
I have this data in firestore:
现在我想从posts Array
中删除第二个Object
.
And now I would like to delete e.g the second Object
out of the posts Array
.
代码:
deletePic () {
let docId = `${this.currentUser.uid}`
fb.usersCollection.doc(docId).update({
posts: firebase.firestore.FieldValue.arrayRemove()
})
.catch(function(error) {
console.error("Error removing document: ", error);
});
}
但是我不知道如何定义arrayRemove()
But I do not know how to define arrayRemove()
这些是图片,每个图片都有一个删除按钮以删除图片.
These are the pictures and each one has a delete button to delete the picture.
推荐答案
Can't you use filter ? And then return the new posts array to your fb.usersCollection
method
//deleteId is the id from the post you want to delete
posts.filter(post => post.id !== deleteId);
edit:所以应该是这样的:
edit : So This should be something like :
deletePic (deleteId) {
let docId = `${this.currentUser.uid}`
//deleteId is the id from the post you want to delete
fb.usersCollection.doc(docId).update({
posts: posts.filter(post => post.id !== deleteId);
})
.catch(function(error) {
console.error("Error removing document: ", error);
});
}
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