From f1a690dcf5edbcb5377a04b4ef5b65035ae7eb7d Mon Sep 17 00:00:00 2001
From: Roland Schlaefli <rolandschlaefli@gmail.com>
Date: Tue, 11 Oct 2022 21:12:16 +0200
Subject: [PATCH] enhance(prisma): make user proposal many-to-many explicit

---
 prisma/schema.prisma | 50 +++++++++++++++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 12 deletions(-)

diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index f2dff5c..9a44350 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -61,14 +61,12 @@ model User {
 
   accounts Account[]
 
-  assignedProposal   Proposal? @relation("proposalAssignment")
-  assignedProposalId String?
-
-  supervises Proposal[] @relation("proposalSupervision")
-  appliedFor Proposal[] @relation("proposalApplication")
-
   createdAt DateTime @default(now())
   updatedAt DateTime @default(now()) @updatedAt
+
+  assignedProposals   UserProposalAssignment[]
+  supervisedProposals UserProposalSupervision[]
+  appliedFor          UserProposalApplication[]
 }
 
 model VerificationToken {
@@ -93,12 +91,40 @@ model Proposal {
   type   ProposalType
   status ProposalStatus @default(OPEN)
 
-  assignedTo          User?   @relation("proposalAssignment", fields: [assignedToStudentId], references: [id])
-  assignedToStudentId String? @unique
-
-  supervisedBy User[] @relation("proposalSupervision")
-  applicants   User[] @relation("proposalApplication")
-
   createdAt DateTime @default(now())
   updatedAt DateTime @default(now()) @updatedAt
+
+  assignedTo   UserProposalAssignment[]
+  supervisedBy UserProposalSupervision[]
+  applications UserProposalApplication[]
+}
+
+model UserProposalAssignment {
+  proposal   Proposal @relation(fields: [proposalId], references: [id])
+  proposalId String
+
+  user   User   @relation(fields: [userId], references: [id])
+  userId String
+
+  @@unique([proposalId, userId])
+}
+
+model UserProposalSupervision {
+  proposal   Proposal @relation(fields: [proposalId], references: [id])
+  proposalId String
+
+  user   User   @relation(fields: [userId], references: [id])
+  userId String
+
+  @@unique([proposalId, userId])
+}
+
+model UserProposalApplication {
+  proposal   Proposal @relation(fields: [proposalId], references: [id])
+  proposalId String
+
+  user   User   @relation(fields: [userId], references: [id])
+  userId String
+
+  @@unique([proposalId, userId])
 }