diff --git a/app/Models/Study.php b/app/Models/Study.php
index d9d464f..4af6288 100644
--- a/app/Models/Study.php
+++ b/app/Models/Study.php
@@ -4,6 +4,7 @@
 
 use App\Models\Enums\ReportStatus;
 use App\Models\Enums\StudyLevelStatus;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\Relations\HasOne;
 
 class Study extends BaseModel
@@ -19,4 +20,14 @@ public function history(): HasOne
     {
         return $this->hasOne(StudyHistory::class);
     }
+
+    public function attachments(): HasMany
+    {
+        return $this->hasMany(StudyAttachment::class);
+    }
+
+    public function reports(): HasMany
+    {
+        return $this->hasMany(StudyReport::class);
+    }
 }
diff --git a/app/Models/StudyNote.php b/app/Models/StudyNote.php
index 1166fad..d47f715 100644
--- a/app/Models/StudyNote.php
+++ b/app/Models/StudyNote.php
@@ -2,6 +2,4 @@
 
 namespace App\Models;
 
-use Illuminate\Database\Eloquent\Model;
-
-class StudyNote extends Model {}
+class StudyNote extends BaseModel {}
diff --git a/app/Models/Template.php b/app/Models/Template.php
index 8eb4d10..fa6db4c 100644
--- a/app/Models/Template.php
+++ b/app/Models/Template.php
@@ -2,4 +2,17 @@
 
 namespace App\Models;
 
-class Template extends BaseModel {}
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Template extends BaseModel
+{
+    public function owner(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'owner_id');
+    }
+
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(TemplateCategory::class, 'category_id');
+    }
+}
diff --git a/database/migrations/2024_12_28_043818_create_study_notes_table.php b/database/migrations/2024_12_28_043818_create_study_notes_table.php
index 94c9414..719554c 100644
--- a/database/migrations/2024_12_28_043818_create_study_notes_table.php
+++ b/database/migrations/2024_12_28_043818_create_study_notes_table.php
@@ -12,8 +12,8 @@ public function up(): void
     {
         Schema::create('study_notes', function (Blueprint $table) {
             $table->id();
-            $table->foreignIdFor(Study::class)->constrained()->onDelete('cascade');
-            $table->foreignIdFor(User::class)->nullable()->constrained()->onDelete('cascade');
+            $table->foreignIdFor(Study::class)->constrained()->cascadeOnDelete();
+            $table->foreignIdFor(User::class)->nullable()->constrained()->cascadeOnDelete();
             $table->string('title')->nullable();
             $table->longText('content');
             $table->timestamps();
diff --git a/database/migrations/2024_12_28_051451_create_study_reports_table.php b/database/migrations/2024_12_28_051451_create_study_reports_table.php
index aafb925..e3857c3 100644
--- a/database/migrations/2024_12_28_051451_create_study_reports_table.php
+++ b/database/migrations/2024_12_28_051451_create_study_reports_table.php
@@ -14,8 +14,9 @@ public function up(): void
         Schema::create('study_reports', function (Blueprint $table) {
             $table->id();
             $table->unsignedTinyInteger('report_status')->default(ReportStatus::Pending->value);
-            $table->foreignIdFor(Study::class)->index()->constrained()->onDelete('cascade');
-            $table->foreignIdFor(User::class)->index()->constrained()->onDelete('cascade');
+            $table->foreignIdFor(Study::class)->index()->constrained()->cascadeOnDelete();
+            $table->foreignIdFor(User::class, 'radiologist_id')->index()->constrained()->cascadeOnDelete();
+            $table->string('report_title')->nullable();
             $table->string('file_path');
             $table->string('pdf_path')->nullable();
             $table->timestamps();