firestore-rules

Firestore security rules for nested collections use structured match statements to enforce authentication and ownership across parent-child structures like clients and enrollments. Reusable helper functions manage access controls and cross-document validations.

Validating Firestore rules with an emulator involves running rules unit testing against your defined match statements. This approach tests request and resource semantics, plus data validation patterns, to ensure access controls function correctly before deployment.

Cross-document validation in Firebase uses get() and exists() functions within Firestore rules to check permissions in other collections. This ensures role-based access and ownership checks pass before allowing reads or writes on the target document.

You can enforce role-based access control in Firestore security rules by applying reusable helper functions. These functions evaluate authentication state, ownership, and user roles to determine permissions for collection-level reads and writes.

Request and resource semantics in Firestore rules represent the incoming data and the existing document state during evaluation. They are used within match statements to apply data validation patterns and ownership checks before authorizing writes.