does trpc support prisma transactions?
I'm trying to run a $transaction() on TRPC router according to T3 app configs, but I need some help figuring out where to start. Also, can an object be mapped to the Prisma update function? I'm updating the number of products sold in a receipt, but I need help thinking of a good way to do it. Thank you so much for your attention and participation.
12 Replies
trpc is only a safe way of calling a backend function
transations are only from the prisma side of it
I understand. I want to do a $Transaction on a TRPC mutation. How do you think I should go about it?
Just do a transaction? Lol
.mutation(async ({ ctx, input }) => {
return await ctx.prisma.$transaction(async (tx) => {
await tx.input.InvoiceItems.map(async element => {
if (element.catergory === 'Product') {
const currentInventory = await ctx.prisma.item.update({
where: {
id: element.itemId
},
data: {
currentInventory: {
decrement: element.quantity,
}
}
})
if (currentInventory.currentInventory! < 0) {
throw new Error(
${element.itemId} is out of stock)
}
}
})
})
})TomDoesTech
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this is what i did, sorry for the newbie questions 😢
its fine
check the link
may help
you should check the inventory before starting the transaction btw
to avoid locking the db
I'm still having trouble updating a dynamically sized dataset, I'm wondering if my code is still wrong or map doesn't work in this scenario...
Unknown User•4y ago
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Ahhh so that's the missing piece
postInvoiceItems: protectedProcedure
.input(z.object({
customerId: z.string(),
discount: z.number(),
discountType: z.string(),
subtotal: z.number(),
paymentType: z.string(),
InvoiceItems: z.array(z.object({
itemId: z.number(),
catergory: z.string(),
//item: z.string(),
unitPrice: z.number(),
quantity: z.number(),
discount: z.number(),
discountType: z.string(),
closeBy: z.string(),
})),
}))
.mutation(async ({ ctx, input }) => {
return ctx.prisma.$transaction(async () => {
await Promise.all(
input.InvoiceItems.map(async element => {
if (element.catergory === 'Product') {
const InvCheck = await ctx.prisma.item.findUnique({
where: {
id: element.itemId,
},
select: {
currentInventory: true
}
})
if (InvCheck?.currentInventory! <= 0) {
throw new Error(
${element.itemId} is out of stock)
}
await ctx.prisma.item.update({
where: {
id: element.itemId
},
data: {
currentInventory: {
decrement: element.quantity,
}
}
})
}
})
)
})
})
That's my working implementation for it
thank you all for the help and guidance ❤️Prisma
Transactions and batch queries (Reference)
This page explains the transactions API of Prisma Client.
Also i had to npx prisma generate to get the interactiveTransactions working