how to make one to many relation with foreign key - prisma

Question

model Categories{
id Int #default(autoincrement()) #id
name String #db.VarChar(30)
products Products[]
}
model Products{
id Int #default(autoincrement()) #id
englishName String #db.VarChar(40) #map("english_name")
category Categories #relation(fields: [categoryId], references: [id])
categoryId String
imgUrl String #map("img_url")
}
Hi! I'm connecting model categories and model products as one to many relations. I want to set categoryId in model Products as a foreign key, but it's not working. Someone please help me! Thank you!

Answer 1

I have modified a little bit your schema:
model Categories{
id Int #default(autoincrement()) #id
name String
products Products[] #relation()
}
model Products{
id Int #default(autoincrement()) #id
englishName String
category Categories #relation(fields: [categoryId], references: [id])
categoryId Int
}
After I have run the migration and finally I have executed the following:
const { PrismaClient } = require('#prisma/client');
const prisma = new PrismaClient();
const saveData = async () => {
const category = await prisma.categories
.create({
data: {
name: 'Category 1',
}
});
console.log(category);
const product = await prisma.products
.create({
data: {
englishName: 'Product 1',
category: {
connect: {
id: category.id
},
}
}
});
console.log(product);
const products = await prisma.products
.findMany({
include: {
category: true
}
});
console.log(products);
};
saveData();
and here you go the result