Tips for instructing kysely key-gen to utilize basic data types for mapping database tables

While using the kysely-codegen tool to automatically create all models from my database, I have noticed a peculiar behavior. It seems to be adding a Generated type to every field instead of generating only number or boolean. Any idea why this is happening?

Is there a way to avoid this and specify the data types directly?

export interface MyTable {
  id: Generated<Numeric>
  otherColumn: Generated<boolean>

Answer №1

This issue may be occurring due to the way your table is defined. If this is not the case, it's recommended to report the problem in the kysely-codegen repository. Alternatively, you can refer to the documentation provided here, specifically focusing on the following excerpt:

// It is advised not to directly utilize the table schema interfaces. Instead, use
// the `Selectable`, `Insertable`, and `Updateable` wrappers. These wrappers ensure
// accurate type handling for each operation.
//
// In most scenarios, relying on type inference without explicit types is preferable.
// However, these types can be beneficial when specifying function parameters.
export type Person = Selectable<PersonTable>
export type NewPerson = Insertable<PersonTable>
export type PersonUpdate = Updateable<PersonTable>

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