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updatedAt (@updatedAt)

This is the equivalent of Prisma's @updatedAt. It automatically sets the current timestamp on specified columns when a record is created or updated.

Schema vs. Constructor​

When using the CLI, this setting is written in schema.prisma. When using the GAS editor alone, you pass it to the GassmaClient constructor (the examples on the rest of this page use the constructor form).

How to write it
Schema (CLI)updatedAt DateTime @updatedAt
Constructor (GAS editor)updatedAt: { Users: "updatedAt" }
model Users {
  id        Int      @id
  name      String
  updatedAt DateTime @updatedAt
}

For how to write schemas, see Schema.

Basic Usage​

const gassma = new Gassma.GassmaClient({
  updatedAt: {
    Users: "updatedAt",
  },
});

// Current timestamp is automatically set during create / update
gassma.Users.create({
  data: { name: "Alice" },
});
// => { name: "Alice", updatedAt: 2026-03-14T... }

gassma.Users.update({
  where: { name: "Alice" },
  data: { name: "Bob" },
});
// => { name: "Bob", updatedAt: 2026-03-14T... } (automatically updated)

Multiple Columns​

You can specify multiple columns using an array.

const gassma = new Gassma.GassmaClient({
  updatedAt: {
    Posts: ["updatedAt", "lastModified"],
  },
});

Applicable Methods​

MethodApplied
create / createMany / createManyAndReturn✅
update / updateMany / updateManyAndReturn✅
upsert (both create and update)✅

Behavior with Explicit Values​

If a value is explicitly specified by the user, the explicit value takes priority.

Notes​

updatedAt is not applied during cascading updates from onDelete / onUpdate (same behavior as Prisma).