颤振上传列表到Google Firestore [英] Flutter upload list to Google Firestore

问题描述

我想将Flutter测试应用中的列表添加到Google Firestore中.

I would like to add a list from my flutter test app to my Google Firestore.

这是我的方法，它会添加所有数据:

This is my method, which adds all the data:

void postToFireStore(
{String mediaUrl, String location, String description}) {

var reference = Firestore.instance.collection('insta_posts');

  reference.add({
    "marked_friends": [chipstuete.toString()],
    "username": currentUserModel.username,
    "location": location,
    "likes": {},
    "mediaUrl": mediaUrl,
    "description": description,
    "ownerId": googleSignIn.currentUser.id,
    "timestamp": new DateTime.now().toString(),

    }).then((DocumentReference doc) {
    String docId = doc.documentID;
    reference.document(docId).updateData({"postId": docId});
  });
}

一切正常，请期待列表"marked_friends" ...

Everything is working fine, expect the list "marked_friends"...

列表"chipstuete"具有多个字符串:

The list "chipstuete" has multiple strings:

[Martin Seubert，Lena Hessler和Vivien Jones]

[Martin Seubert, Lena Hessler, Vivien Jones]

但是我的Firestore看起来像这样:

But my Firestore looks like that:

目前，整个列表存储在marked_friends [0] ...

At the moment the whole list is stored in marked_friends[0]...

我需要更改什么，将列表"chipstuete"的每个条目存储在Firestore中数组"marked_friends"的单独字段中?

What do I need to change, that every entry of my list "chipstuete" is stored in a seperate field of my array "marked_friends" in Firestore?

最诚挚的问候！

推荐答案

我有解决方法.

就像SwiftingDuster所说的那样，我需要一个新方法将其序列化为List:

Like SwiftingDuster said, I needed a new method which serializes it to a List:

List<String> toList() {

  chipstuete.forEach((item) {
    newtuete.add(item.toString());
  });

  return newtuete.toList();
}

之后，我只需在我的postToFirestore()方法中调用toList()并添加"marked_friends":newtuete.就是这样！

After that I just call toList() in my postToFirestore() Method and add "marked_friends": newtuete. Thats it!

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