fix: allow empty expr for dbgenerated() (#1400)

[clementoriol]

Hey !
The fix for #1400 seemed easy enough (I mean who get the chance to submit a one char PR ? 😄) so here it goes.

The Prisma docs are not very clear on the subject but dbgenerated() can also accept no arguments for the use-case specified in the related ticket. (prisma docs: https://www.prisma.io/docs/orm/reference/prisma-schema-reference#dbgenerated)

However it does NOT supports empty strings but I don't think this can be expressed here.

Looking forward to any feedback.

[coderabbitai]

Walkthrough

Walkthrough

The recent update modifies the dbgenerated function within the stdlib.zmodel file to now accept an optional string parameter. This change enhances flexibility by allowing the function to be invoked without arguments, aligning with scenarios like the default value generation in database schemas.

Changes

File Path	Change Summary
packages/schema/src/.../stdlib.zmodel	Updated dbgenerated function to accept an optional expr parameter.

Possibly related issues

• [BUG] zmodel does not support calling @default(dbgenerated()) with no parameters #1400 - The issue reports that zmodel does not support calling dbgenerated() without parameters, which this PR addresses by making the expr parameter optional. This change should resolve the error mentioned in the issue.

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Commits

Files that changed from the base of the PR and between 96390fd and 3d9db97.

Files selected for processing (1)

• packages/schema/src/res/stdlib.zmodel (1 hunks)

Additional comments not posted (1)

packages/schema/src/res/stdlib.zmodel (1)

115-115: The change to make the expr parameter optional in dbgenerated function is correctly implemented and aligns with the Prisma documentation.

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[ymc9]

Thank you for the fix @clementoriol ! Yes, Prisma's doc is a bit fuzzy about function details. I like that we can tweak to provide better flexibility. The change looks good to me and I'll merge it after CI passes. Will include it into a new patch release soon.