feat: [공정관리] parent_id 트리 구조 도입 — 마이그레이션, 모델 관계, 2depth 검증

app/Http/Requests/V1/Process/StoreProcessRequest.php

@@ -14,6 +14,7 @@ public function authorize(): bool
     public function rules(): array
     {
         return [
+            'parent_id' => ['nullable', 'integer', 'exists:processes,id'],
             'process_name' => ['required', 'string', 'max:100'],
             'description' => ['nullable', 'string'],
             'process_type' => ['required', 'string', 'in:생산,검사,포장,조립'],

app/Http/Requests/V1/Process/UpdateProcessRequest.php

@@ -13,7 +13,10 @@ public function authorize(): bool
 
     public function rules(): array
     {
+        $processId = $this->route('id');
+
         return [
+            'parent_id' => ['nullable', 'integer', 'exists:processes,id', "not_in:{$processId}"],
             'process_name' => ['sometimes', 'required', 'string', 'max:100'],
             'description' => ['nullable', 'string'],
             'process_type' => ['sometimes', 'required', 'string', 'in:생산,검사,포장,조립'],

app/Models/Process.php

@@ -21,6 +21,7 @@ class Process extends Model
 
     protected $fillable = [
         'tenant_id',
+        'parent_id',
         'process_code',
         'process_name',
         'description',
@@ -47,6 +48,24 @@ class Process extends Model
         'required_workers' => 'integer',
     ];
 
+    /** 부모 공정 */
+    public function parent(): BelongsTo
+    {
+        return $this->belongsTo(self::class, 'parent_id');
+    }
+
+    /** 자식 공정 */
+    public function children(): HasMany
+    {
+        return $this->hasMany(self::class, 'parent_id')->orderBy('process_code');
+    }
+
+    /** 루트 공정만 조회 */
+    public function scopeRoots($query)
+    {
+        return $query->whereNull('parent_id');
+    }
+
     /**
      * 중간검사 양식
      */

app/Services/ProcessService.php

@@ -23,9 +23,11 @@ public function index(array $params)
         $status = $params['status'] ?? null;
         $processType = $params['process_type'] ?? null;
 
+        $eagerLoad = ['classificationRules', 'processItems.item:id,code,name', 'steps', 'documentTemplate:id,name,category', 'workLogTemplateRelation:id,name,category', 'parent:id,process_code,process_name', 'children:id,parent_id,process_code,process_name,is_active'];
+
         $query = Process::query()
             ->where('tenant_id', $tenantId)
-            ->with(['classificationRules', 'processItems.item:id,code,name', 'steps', 'documentTemplate:id,name,category', 'workLogTemplateRelation:id,name,category']);
+            ->with($eagerLoad);
 
         // 검색어
         if ($q !== '') {
@@ -62,7 +64,7 @@ public function show(int $id)
         $tenantId = $this->tenantId();
 
         $process = Process::where('tenant_id', $tenantId)
-            ->with(['classificationRules', 'processItems.item:id,code,name', 'steps', 'documentTemplate:id,name,category', 'workLogTemplateRelation:id,name,category'])
+            ->with(['classificationRules', 'processItems.item:id,code,name', 'steps', 'documentTemplate:id,name,category', 'workLogTemplateRelation:id,name,category', 'parent:id,process_code,process_name', 'children:id,parent_id,process_code,process_name,is_active'])
             ->find($id);
 
         if (! $process) {
@@ -81,6 +83,16 @@ public function store(array $data)
         $userId = $this->apiUserId();
 
         return DB::transaction(function () use ($data, $tenantId, $userId) {
+            // 2depth 제한: 부모가 이미 자식이면 거부
+            if (! empty($data['parent_id'])) {
+                $parent = Process::find($data['parent_id']);
+                if ($parent && $parent->parent_id) {
+                    throw \Illuminate\Validation\ValidationException::withMessages([
+                        'parent_id' => ['2단계까지만 허용됩니다. 선택한 부모 공정이 이미 하위 공정입니다.'],
+                    ]);
+                }
+            }
+
             // 공정코드 자동 생성
             $data['process_code'] = $this->generateProcessCode($tenantId);
             $data['tenant_id'] = $tenantId;
@@ -122,6 +134,22 @@ public function update(int $id, array $data)
         }
 
         return DB::transaction(function () use ($process, $data, $userId) {
+            // parent_id 변경 시 2depth + 순환 참조 검증
+            if (array_key_exists('parent_id', $data) && $data['parent_id']) {
+                $parent = Process::find($data['parent_id']);
+                if ($parent && $parent->parent_id) {
+                    throw \Illuminate\Validation\ValidationException::withMessages([
+                        'parent_id' => ['2단계까지만 허용됩니다.'],
+                    ]);
+                }
+                // 자기 자식을 부모로 설정하는 것 방지
+                if ($process->children()->where('id', $data['parent_id'])->exists()) {
+                    throw \Illuminate\Validation\ValidationException::withMessages([
+                        'parent_id' => ['하위 공정을 부모로 설정할 수 없습니다.'],
+                    ]);
+                }
+            }
+
             $data['updated_by'] = $userId;
 
             // work_steps가 문자열이면 배열로 변환
@@ -288,6 +316,7 @@ public function duplicate(int $id)
 
             $newProcess = Process::create([
                 'tenant_id' => $tenantId,
+                'parent_id' => $source->parent_id,
                 'process_code' => $newCode,
                 'process_name' => $source->process_name.' (복사)',
                 'description' => $source->description,