fix

backend/migrations/000007_create_participants_table.up.plsql

@@ -1,6 +1,7 @@
 CREATE TABLE participants(
-    user_id bigserial NOT NULL,
-    event_id bigserial NOT NULL,
+    id bigserial NOT NULL PRIMARY KEY,
+    user_id bigint NOT NULL,
+    event_id bigint NOT NULL,
     status text NOT NULL,
     created_at timestamp WITH TIME ZONE NOT NULL
-);
+);

backend/pkg/models/participants.go

@@ -1,8 +1,7 @@
 package models
 
-// TODO: Add Status as Postgres ENUM
-
 type Participant struct {
+	ID      uint64 `gorm:"column:id"`
 	UserID  uint64 `gorm:"column:user_id" json:"user_id,omitempty"`
 	EventID uint64 `gorm:"column:event_id" json:"event_id,omitempty"`
 	Status  string `gorm:"column:status" json:"status,omitempty"`