Saving Data on Android

Key points
•
Security rules
 check the requests that are coming to the database and lets 
through those that satisfy the criteria and reject the ones that don't.
• Security rules consist of two things: 1. Specifying which documents you are 
securing; 2. What logic you're using to secure them.
• In the 
Rules
 tab in the Firebase console, you can see your current security 
configuration.
Saving Data on Android
Chapter 19: Securing Data in Cloud Firestore
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•
match
 statement specifies the path to the document.
•
allow
 expression specifies when the writing or reading the data is allowed.
• Security rules in Cloud Firestore 
do not
 cascade.
• Cloud Firestore provides 
Simulator
 feature that you can use to test your rules.