Prisma Files

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Highlights

strictUndefinedChecks in Preview

With Prisma ORM 5.20.0, the Preview feature strictUndefinedChecks will disallow any value that is explicitly undefined and will be a runtime error. This change is direct feedback from this GitHub issue and follows our latest proposal on the same issue.

To demonstrate the change, take the following code snippet:

:::tsx
prisma.table.deleteMany({
  where: {
    // If `nullableThing` is nullish, this query will remove all data.
    email: nullableThing?.property,
  }
})

In Prisma ORM 5.19.0 and below, this could result in unintended behavior. In Prisma ORM 5.20.0, if the strictUndefinedChecks Preview feature is enabled, you will get a runtime error instead:

:::tsx
Invalid \`prisma.user.findMany()\` invocation in
/client/tests/functional/strictUndefinedChecks/test.ts:0:0
  XX })
  XX 
  XX test('throws on undefined input field', async () => {
→ XX   const result = prisma.user.deleteMany({
         where: {
           email: undefined
                  ~~~~~~~~~
         }
       })
Invalid value for argument \`where\`: explicitly \`undefined\` values are not allowed."

We have also introduced the Prisma.skip symbol, which will allow you to get the previous behavior if desired.

:::tsx
prisma.table.findMany({
  where: {
    // Use Prisma.skip to skip parts of the query
    email: nullableEmail ?? Prisma.skip
  }
})

From Prisma ORM 5.20.0 onward, we recommend enabling strictUndefinedChecks, along with the TypeScript compiler option exactOptionalPropertyTypes, which will help catch cases of undefined values at compile time. Together, these two changes will help protect your Prisma queries from potentially destructive behavior.

strictUndefinedChecks will be a valid Preview feature for the remainder of Prisma ORM 5. With our next major version, this behavior will become the default and the Preview feature will be “graduated” to Generally Available.

If you have any questions or feedback about strictUndefinedChecks, please ask/comment in our dedicated Preview feature GitHub discussion.

typedSql bug fix

Thank you to everyone who has tried out our typedSql Preview feature and provided feedback! This release has a quick fix for typescript files generated when Prisma Schema enums had hyphens.

Fixes and improvements

Prisma

• Prisma incorrectly parses CRDB's FK constraint error as not available.
• Invalid TypeScript files created by generate when typedSql is enabled and enum contains hyphens.
• @prisma/internals didn't list ts-toolbelt in dependencies.
• using $extends prevents model comments from being passed to TypeScript

Prisma Engines

• Planetscale engine tests: interactive_tx
• Fix broken engine size publishing workflow

Credits

Huge thanks to @mcuelenaere, @pagewang0, @key-moon, @pranayat, @yubrot, @thijmenjk, @mydea, @HRM, @haaawk, @baileywickham, @brian-dlee, @nickcarnival, @eruditmorina, @nzakas, and @gutyerrez for helping!