app/Http/Controllers/Admin/StudentController.php

@@ -48,6 +48,13 @@ class StudentController extends Controller
             'school_id' => ['required', 'exists:schools,id'],
         ]);
 
+        if (Student::where('first_name', request('first_name'))
+            ->where('last_name', request('last_name'))
+            ->where('school_id', request('school_id'))
+            ->exists()) {
+            return redirect('/admin/students/create')->with('error', 'This student already exists.');
+        }
+
         Student::create([
             'first_name' => request('first_name'),
             'last_name' => request('last_name'),
@@ -91,6 +98,14 @@ class StudentController extends Controller
             }
         }
 
+        if (Student::where('first_name', request('first_name'))
+            ->where('last_name', request('last_name'))
+            ->where('school_id', request('school_id'))
+            ->where('id', '!=', $student->id)
+            ->exists()) {
+            return redirect('/admin/students/'.$student->id.'/edit')->with('error', 'A student with that name already exists at that school');
+        }
+
         $student->update([
             'first_name' => request('first_name'),
             'last_name' => request('last_name'),

app/Http/Controllers/StudentController.php

@@ -89,6 +89,7 @@ class StudentController extends Controller
      */
     public function update(Request $request, Student $student)
     {
+
         if ($request->user()->cannot('update', $student)) {
             abort(403);
         }
@@ -98,6 +99,14 @@ class StudentController extends Controller
             'grade' => ['required', 'integer'],
         ]);
 
+        if (Student::where('first_name', request('first_name'))
+            ->where('last_name', request('last_name'))
+            ->where('school_id', Auth::user()->school_id)
+            ->where('id', '!=', $student->id)
+            ->exists()) {
+            return redirect()->route('students.edit', $student)->with('error', 'A student with that name already exists at your school.');
+        }
+
         $student->update([
             'first_name' => request('first_name'),
             'last_name' => request('last_name'),

tests/Feature/Pages/Admin/StudentEditTest.php

@@ -224,3 +224,16 @@ it('does not allow a non administrator to delete a student', function () {
         ->assertRedirect(route('dashboard'));
     expect(Student::find($condemnedStudent->id))->toBeInstanceOf(Student::class);
 });
+it('will not duplicate a name at a school', function () {
+    $student1 = Student::factory()->create();
+    $student2 = Student::factory()->create(['school_id' => $student1->school_id]);
+    actingAs($this->adminUser);
+    $response = patch(route('admin.students.update', $student2), [
+        'first_name' => $student1->first_name,
+        'last_name' => $student1->last_name,
+        'grade' => $student2->grade,
+        'school_id' => $student2->school_id,
+    ]);
+    $response->assertRedirect(route('admin.students.edit', $student2))
+        ->assertSessionHas('error', 'A student with that name already exists at that school');
+});

tests/Feature/Pages/StudentsEditTest.php

@@ -73,3 +73,16 @@ it('will not modify a student not at the users school', function () {
         ->assertSee('Bandit')
         ->assertDontSee('Bluey');
 });
+
+it('will not duplicate a student name at the school', function () {
+    actingAs($this->user);
+    $student = Student::factory()->create(['school_id' => $this->school->id, 'first_name' => 'Bluey', 'last_name' => 'Heeler']);
+
+    patch(route('students.update', $this->student), [
+        'first_name' => 'Bluey',
+        'last_name' => 'Heeler',
+        'grade' => 1,
+    ])->assertRedirect(route('students.edit', $this->student))
+        ->assertSessionHas('error', 'A student with that name already exists at your school.')
+        ->assertSessionHasNoErrors();
+});