Prisma ORM Data Filtering with ReBAC

Prisma ORM is a popular Node.js toolkit for managing relational databases, but it lacks built-in data filtering based on user permissions, which is crucial for systems where users must only access authorized data. To address this, the article discusses implementing Relationship-Based Access Control (ReBAC) within Prisma to automate permissions and improve scalability. By integrating ReBAC, developers can enforce fine-grained, instance-level access control directly within Prisma queries without manual permission checks, demonstrated through building a project management API. This API, built with Node.js, Express, and Prisma, uses a Project-Task hierarchy to control data visibility based on organizational relationships, ensuring data isolation and simplified permission management. The guide explains setting up ReBAC policies, integrating them into an Express app, and visualizing their effect in practice, ultimately creating a secure, scalable API that filters database records automatically based on user permissions while keeping controller logic clean.

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