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In this blog we’ll design a model foundation using UUID7 identifiers, model prefixes, and a shared tenant-aware base model.

Django model structure

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In this part, we will define serializers for read and write operations, and build a viewset that always returns tenant-filtered data for all read operations.

Serializer, View and tenant filtered read data

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In this part, we will focus on protecting write operations from malicious or cross-tenant data access. We will ensure that only valid tenant-owned data can be created or updated in the system.

Preventing Malicious Writes in Multi-Tenant

In multi-tenant systems, one of the most serious security failures is cross-tenant data access—where one tenant can read or modify another tenant’s records. We will see how we can ignore all these.