I updated my Prisma ORM database model by adding two more fields 'ahash' and 'sAddress' to the 'invitation' table.
The table already contains 6 rows of data.
When I try to migrate the new changes to the Postgresql database, I get the error Database error code: 23502. ERROR: column "aHash" of relation "Invitation" contains null values.
How do I cater for the null values and migrate the model updates smoothly onto the database?
Give me a Step by step account please. I'm new to Prisma migration.
Thanks in advance!
The Prisma invitation model looks like below.
model Invitation {
id String @id @db.Uuid
workId String @db.Uuid
work Work @relation(fields: [workId], references: [id])
status RequestStatus
coId String @db.Uuid
oSignature String
note String
aHash String
sAddress String
createdAt DateTime
respondedAt DateTime
}
The problem here is that ahash and sAddress are both mandatory fields. However, they do not exist for the 6 existing rows/records in your database.
If you want to add new columns to an existing database without causing data loss you need to make sure the new columns/field are optional. This can be done in Prisma by marking the type of the field with a ?.
If you need the field to be mandatory, you could do it in three steps:
ahash and sAddress fields as optional first in your prisma schema and run a migration.ahash and sAddress fields.In step 3, you will no longer get the error because none of the records contain a null value for the ahash and sAddress fields.