Prisma transaction – Prisma

The Problem:

In a Prisma transaction involving upserting a product variant along with its associated photos, the code returns an error message indicating that the transaction is already closed. The goal is to ensure successful upsertion of both the product variant and its photos within a single transaction to maintain data integrity. How can this error be resolved or an alternative approach be taken to achieve the desired result?

The Solutions:

Solution 1: Using for…of loops

The idea is to replace the .forEach loops with for…of loops to ensure that the await statements within the loops are awaited properly. This ensures that the transaction waits for all the asynchronous operations/callbacks to finish before it’s closed. Here’s the modified code:

“`js
return ctx.prisma.$transaction(async (tx) => {
for (const variant of input.variants) {
const variantOnDB = await tx.productVariant.upsert({
where: {
id: variant.id,
},
update: {
name: variant.name,
},
create: {
name: variant.name,
productId: product.id,
},
})

if (variant.photos) {
  for (const photo of variant.photos) {
    if (isBase64(photo.id)) {
      const result = await cloudinary.uploader.upload(photo.id)
      await tx.productVariant.update({
        where: {
          id: variantOnDB.id,
        },
        data: {
          name: '',
          photos: {
            upsert: {
              where: {
                id: photo.id,
              },
              create: {
                id: photo.id,
                order: photo.order,
              },
              update: {
                order: photo.order,
              },
            },
          },
        },
      })
    }
  }
}

}
})

Video Explanation:

The following video, titled "Interactive Transactions in Prisma - YouTube", provides additional insights and in-depth exploration related to the topics discussed in this post.

Check out the full course at: https://howtoprisma.com/production-ready-prisma/ Prisma offers two ways to do transactions: sequential ...