Implementation for conditional updates

Problem

It would be nice to update a field if a specific condition is met. For example an enum or string field “role”:

UPDATE `User` SET role = IF(role = 'Incomplete', 'Premium', role), verified = 1
WHERE emailValidated = 1

Suggested solution

Add “filter” to StringFieldUpdateOperationsInput and other types:

  export type StringFieldUpdateOperationsInput = {
      set?: string
      filter?: { condition: StringFilter, set: string }
  }

Alternatives

• Doing a select and update will be an easy workaround, but it is not atomic anymore.
• Doing two updates will be atomic at the cost of speed/DB usage …
• Write raw sql 😦

[Ducki]

I’d like to add another example use case: Update a record based on the unique id AND a second field, e.g. if a createdByUserId field matches the currently loggend in user. In raw SQL, that’s perfectly fine, but with Prisma, I first habe to fetch the company row, then check my second condition, and then update.

[asciant]

I appreciate this is an old issue, although I just wanted to add that it would be nice to have an atomic way of doing this.

In my case, I’m needing to do an initial query to obtain the record, once it has been retrieved I check a condition and then update accordingly. It would be good to do this in an atomic way.

Using the example from Matthew (because my data, demonstrated here as the user’s role, is not immediately available to the function, I have to obtain it first and then do an update separately):

const user = await prisma.user.findUnique({
  where: {
    id: 1
  }
})

await prisma.user.update({
  data: {
    role: user.role === 'Incomplete' ? 'Premium' : user.role,
    verified: 1
  },
  where: {
    id: 1
  }
})