Building a multi-tenant SaaS is never straightforward, and this case study from a livestock management platform highlights six common pitfalls that can trip up any team. The first is tenant isolation: relying on application-level filters instead of database-level enforcement can lead to data leaks. The second involves enum contracts between backend and frontend, where mismatched values cause silent bugs. Third, record field serialization in .NET 8 can behave unexpectedly when combined with certain JSON options. Fourth, EF Core migration inconsistencies arise when multiple developers work on the same model without a clear process. Fifth, Razor syntax conflicts with frontend templating languages like Vue's mustache syntax, requiring careful escaping. Finally, integrating WeChat AI skills requires handling a three-layer response structure that is easy to misparse. Each pitfall comes with a practical fix, making this a valuable reference for architects and developers working on similar systems. The lessons are domain-agnostic and can be applied to any multi-tenant SaaS project, from agriculture to finance.
Real-world lessons from building a multi-tenant livestock SaaS with .NET 8 and uni-app, covering tenant isolation, enum contracts, serialization, and migration pitfalls.