m

backend/app/prisma/schema.prisma

@@ -1,7 +1,6 @@
 generator client {
   provider = "prisma-client"
   output   = "../generated/prisma"
-  previewFeatures = ["driverAdapters"]
 }
 
 datasource db {
@@ -17,8 +16,40 @@ generator prismabox {
 } 
 
 model User {
-  id       String @id @default(cuid())
-  email    String @unique
+  id String @id @default(cuid())
+  email String @unique
   username String @unique
+  password String
+  createdAt DateTime @default(now())
+  messages Message[] @relation("UserMessages")
+  conversationMemberships ConversationParticipant[] @relation("UserConversations")
 }
 
+model Conversation {
+  id String @id @default(cuid())
+  createdAt DateTime @default(now())
+  participants ConversationParticipant[] @relation("ConversationParticipants")
+  messages Message[] @relation("ConversationMessages")
+}
+
+model ConversationParticipant {
+  id String @id @default(cuid())
+  conversationId String
+  userId String
+  conversation Conversation @relation("ConversationParticipants", fields: [conversationId], references: [id], onDelete: Cascade)
+  user User @relation("UserConversations", fields: [userId], references: [id], onDelete: Cascade)
+  lastReadAt DateTime?
+  @@unique([conversationId, userId])
+  @@index([userId])
+}
+
+model Message {
+  id String @id @default(cuid())
+  conversationId String
+  senderId String
+  content String
+  createdAt DateTime @default(now())
+  conversation Conversation @relation("ConversationMessages", fields: [conversationId], references: [id], onDelete: Cascade)
+  sender User @relation("UserMessages", fields: [senderId], references: [id], onDelete: Cascade)
+  @@index([conversationId, createdAt])
+}