feat(prisma): Prep v6 for v7 upgrade

[Tobbe]

This PR prepares for Prisma v7 by introducing an indirection layer for all Prisma imports. Prisma v7 will change where the generated client lives (from @prisma/client to a local project path like ./generated/prisma/), which would normally require rewriting imports across every service, test, and scenario file.

This PR makes the import change now (if you want), while still on v6, to isolate major code changes from the Prisma v7 upgrade, to make it easier to debug any issues (fewer moving parts). The PR does that by making src/lib/db re-export everything from Prisma, then point all consumer code at src/lib/db instead of @prisma/client. This is done now on v6 where both paths work, so the change can be validated safely. When v7 lands, only one line in db.ts needs to change:

// v6 (this PR)
export * from '@prisma/client'
// v7 (future PR)
export * from './generated/prisma/client.js'

The PR touches four areas:

db.ts templates
Adds export * from '@prisma/client' so src/lib/db becomes a superset of @prisma/client

Generator templates & codegen
Newly generated services, tests, scenarios, and GraphQL type files now import from src/lib/db instead of @prisma/client

A jscodeshift codemod
prismaV7Prep.ts automates the migration for existing user projects

All fixture/test-project files
Updated to match the new pattern

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☁️ Nx Cloud last updated this comment at 2026-02-26 17:24:33 UTC

[greptile-apps]

Greptile Summary

Prepares Cedar for Prisma v7 by centralizing all Prisma imports through src/lib/db, making the eventual v7 upgrade a one-line change.

Major Changes:

• Added export * from '@prisma/client' to all db.ts/db.js files
• Updated all generator templates (service scenarios, tests, data migrations) to import from src/lib/db
• Updated GraphQL codegen to emit imports from src/lib/db (API) and $api/src/lib/db (web)
• Created a new codemod (prismaV7Prep) to help users migrate their existing projects
• Comprehensive migration documentation in prisma-v6-to-v7-step-1.md

Critical Issues Found:

• 11 scenario files in __fixtures__ have duplicated content (every line appears twice), causing syntax errors
• Affected fixtures: test-project, test-project-live, and esm-test-project
• Files with duplications: *.scenarios.ts files for contacts, posts, users, and describeContacts
• The templates and test-project/ (root) are correct—only __fixtures__/ directories are affected

Confidence Score: 1/5

• This PR cannot be merged due to critical syntax errors in 11 fixture files
• While the approach is sound and templates/codemods are correct, 11 scenario files have completely duplicated content causing syntax errors. These must be fixed before merge.
• All scenario files in __fixtures__/test-project, __fixtures__/test-project-live, and __fixtures__/esm-test-project need immediate attention to remove duplicated lines

Important Files Changed

Filename	Overview
fixtures/test-project/api/src/services/contacts/contacts.scenarios.ts	Duplicated scenario content causing syntax errors throughout file
fixtures/test-project/api/src/services/posts/posts.scenarios.ts	Duplicated scenario content causing syntax errors throughout file
fixtures/test-project-live/api/src/services/contacts/contacts.scenarios.ts	Duplicated scenario content causing syntax errors throughout file
fixtures/esm-test-project/api/src/services/posts/posts.scenarios.ts	Duplicated scenario content causing syntax errors throughout file
packages/codemods/src/codemods/v2.7.x/prismaV7Prep/prismaV7Prep.ts	New codemod to help users migrate Prisma imports to src/lib/db
packages/create-cedar-app/templates/ts/api/src/lib/db.ts	Added export * from '@prisma/client' to enable re-exporting pattern
packages/internal/src/generate/graphqlCodeGen.ts	Updated GraphQL codegen to import Prisma from src/lib/db instead of @prisma/client

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[User Code] -->|Before: import from| B["@prisma/client"]
    A -->|After: import from| C["src/lib/db"]
    C -->|Re-exports| B
    
    D[Generator Templates] -->|Generate code with| C
    E[GraphQL Codegen] -->|Generates types from| C
    F[Codemod] -->|Migrates imports to| C
    
    C -->|Prisma v7: switch to| G["../db/generated/prisma/client.js"]
    
    style B fill:#f9f,stroke:#333
    style C fill:#9f9,stroke:#333
    style G fill:#99f,stroke:#333

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