This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
Prisma relations solve a huge problem with databases and data handling.
Suppose you have a list of users in your app, that create tweets (imagine Twitter).
In your schema you can define the relation between those 2 entities in this way:
model Tweet {
id Int @id @default(autoincrement())
text String
author User @relation(fields: [authorId], references: [id])
authorId Int
}
model User {
id Int @default(autoincrement()) @id
tweets Tweet[]
}When you create a new tweet you associate it with a user with id 1 in this way:
await prisma.tweet.create({
data: {
text: req.body.content,
author: {
connect: { id: 1 }
}
}
})
Then you can retrieve the author information when you get one tweet, with:
await prisma.tweet.findMany({
include: {
author: true
}
})
You can also create a user and populate the database with 2 tweets associated to it:
await prisma.user.create({
data: {
tweets: {
create: [
{ text: 'test' },
{ text: 'test2' },
]
}
}
})
This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
flaviocopes.com | Sciencx (2021-07-13T05:00:00+00:00) Prisma relations. Retrieved from https://www.scien.cx/2021/07/13/prisma-relations/
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