Prisma: how to write transaction where results from one query are used by another query - postgresql

Question

I'm working on a project with Next.js and Prisma. In one of my API routes, I have a three queries. The results of the first and second queries are used in the third query. I'd like to do all three operations as a transaction and then return the data from the first query in the response.
I'm familiar with using prisma.$transaction but I don't know how to write it in this case where results #1 and #2 are used by query #3. Here are the queries as they are written now. Thanks in advance!
const { boardId } = req.body
const { description, status, title } = req.body.task
const createTask = await prisma.task.create({
data: {
board: boardId,
description,
status,
title
}
})
const statusArray = await prisma.board.findUnique({
where: {
id: boardId
},
select: {
[status]: true
}
})
const updateBoardStatusArray = await prisma.board.update({
where: {
id: boardId
},
data: {
[status]: {
set: [...statusArray[status], createTask.id]
}
}
})
// return data from first query
res.status(201).json({task: createTask})

Answer 1

Here you go:
const { boardId } = req.body;
const { description, status, title } = req.body.task;
const [createTask] = await prisma.$transaction(async (prisma) => {
const createTask = await prisma.task.create({
data: {
board: boardId,
description,
status,
title,
},
});
const statusArray = await prisma.board.findUnique({
where: {
id: boardId,
},
select: {
[status]: true,
},
});
const updateBoardStatusArray = await prisma.board.update({
where: {
id: boardId,
},
data: {
[status]: {
set: [...statusArray[status], createTask.id],
},
},
});
return [createTask, statusArray, updateBoardStatusArray];
});
// return data from first query
res.status(201).json({ task: createTask });
You can learn more about Interactive Transaction here