具有Flutter的FieldValue arrayUnion和Cloud FireStore [英] FieldValue arrayUnion and Cloud FireStore with Flutter

问题描述

我有这样的云火存储对象

I have cloud fire store object like this

"TestCollection" : ["Test1","Test"]

现在我要使用FieldValue.arrayUnion更新此数组因为如果元素相同，那么我不想做任何事情，但是如果不是，那么我想添加元素

Now I want to update this array with FieldValue.arrayUnion because if element is same then i don't want to do anything but if it is not then I would like to add element

docRef.updateData({"TestCollection":FieldValue.arrayUnion(["test"])})

但是此语句给出了错误，例如对象不能具有嵌套数组

but this statement gives the error like object can not have nested array

任何人都可以帮助或提供类似的示例来查找语法吗?

Can anyone please help or provide same kind of example to have look for syntax ?

推荐答案

我找到了一个解决方案.试试这个:

I have found a solution. Try this:

 Firestore.instance
.collection('YourCollection')
.document('YourDocument')
.updateData({'array':FieldValue.arrayUnion(['data1','data2','data3'])});

如果仍然无法正常运行，请尝试更新您的Firebase.

If it still doesn't work, try to update your Firebase.

首先打开一个提取到您的flutter项目的终端，然后:

First open a terminal fetched to your flutter project, then:

cd ios
pod update Firebase

此解决方案仅适用于mac用户.

This solution is only for mac users.

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