How to avoid promoting @prisma/client to the global world by prisma under pnpm Monorepo?

In Monorepo projects managed with pnpm, when using Prisma, the migrate or generate command may unexpectedly promote @prisma/client to global scope, affecting other subprojects that rely on Prisma. This article analyzes this problem and provides solutions.

The root of the problem is that when a subproject executes Prisma's migrate or generate commands, @prisma/client will be promoted to the Monorepo root directory, causing all subprojects to share the same version of @prisma/client . This can cause version conflicts or incompatibility issues. The hoist-pattern policy in the .npmrc file is invalid in this scenario. Unlike Yarn, the nohoist setting of pnpm is also not applicable.

The solution is to fine-grained control of pnpm's package upgrade mechanism to prevent @prisma/client from being promoted to the global level. Although hoist-pattern fails, pnpm's workspaces feature provides a solution. The key is to make sure each subproject has its own independent version of @prisma/client .

This requires rational design of the project structure and strict control of the dependency installation process of each subproject to avoid accidental sharing of @prisma/client . Avoid global installations in the root directory, but ensure that each subproject manages its dependencies independently.

By rationally utilizing workspaces feature of pnpm and prudently managing the dependencies of each subproject, @prisma/client can be effectively avoided from being promoted globally after migrate or generate commands, thereby ensuring that all subprojects in Monorepo can run independently and stably.

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