Firestore安全规则检查字段是否为整数 [英] firestore security rule check if a field is an integer

问题描述

我想知道如何检查字段是否为整数.我知道我们可以使用 int(request.resource.data [field])将字段条目转换为整数，但是有一种方法可以检查 request.resource.data[field] 是一个整数，如果是则返回true，否则返回false?

I am wondering how do I check if a field is an integer or not. I know that we are able to convert a field entry to an integer with int(request.resource.data[field]), but is there a way to check if request.resource.data[field] is an integer, return true if it is, and false it isn't?

推荐答案

您可以使用 is 运算符检查类型.

You can check for type with the is operator.

所以:

request.resource.data[field] is int

或

request.resource.data.field is int

我强烈建议您在 Firebase安全规则中的数据类型和全局对象中查看Doug的视频在检查类型上.

I highly recommend checking out Doug's video on Data types and global objects in Firebase security rules, specifically the section on checking types.

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