Prisma: Create or Connect Records in Explicit Many-to-Many Relations - orm

Question

In my Prisma Schema, I'm finding it difficult to undertand how to to create records in case of explicit many-to-many relations.
I have the following schema. Basically it represents Lists of Books. Users can Create Lists of Books.
A user can create a New list and then add books to this list along with their own notes. The Book Model is pure and contains standard book information.
The extra model is required because the user who is adding the book to the list can add his own notes about the book.
model List {
id Int #default(autoincrement()) #id
title String
slug String?
content String?
published Boolean #default(false)
author User? #relation(fields: [authorId], references: [id])
authorId Int?
books BooksInLists[]
createdAt DateTime #default(now())
updatedAt DateTime #updatedAt
}
model BooksInLists {
list List #relation(fields: [listId], references: [id])
listId Int // relation scalar field (used in the `#relation` attribute above)
book Book #relation(fields: [bookId], references: [id])
bookId Int // relation scalar field (used in the `#relation` attribute above)
##id([listId, bookId])
adder User? #relation(fields: [adderId], references: [id])
adderId Int?
notes String?
}
model Book {
id Int #id #default(autoincrement())
name String
lists BooksInLists[]
curator User? #relation(fields: [curatorId], references: [id])
curatorId Int?
bookDescription String?
}
model User {
id Int #default(autoincrement()) #id
name String?
email String? #unique
lists List[]
books Book[]
booksinlists BooksInLists[]
##map(name: "users")
}
The queries that I want to be able to do.
While updating a list, I should be able to add a new book to the list. This should create the new book, and also allow me to add a new record in BooksInLists model along with the 'notes' field.
While updating a list, I should be able to add/connect an existing book to the list. This will allow me to add a new record in BooksInLists model along with the 'notes' field.

Answer 1

It will be something like that:
prisma.booksInLists.create({
data: {
list: {
connect: {
id: 99
},
},
book: {
create: {
name: 'Young Lions'
}
}
}
})
However I see flaws in database schema. Model BooksInLists connects Books and List, so you don't need adder relation. In turn in Book model you shouldn't add curator relation because it's many to many relation. You have to use junction table usersBooks that connects User and Book tables.