Phase 3 완료: 파일 처리 시스템 구축

✅ 주요 완성 기능:
- 프로젝트 생성 API (project_name 필드 포함)
- 엑셀 파일 업로드 및 파싱 시스템
- 자재 DB 저장 (2837개 자재 성공 저장)
- 자재 조회 및 요약 통계 API
- 외래키 관계 정상 동작 (projects -> files -> materials)

📊 테스트 결과:
- MP7 PIPING PROJECT Rev.2 프로젝트 생성
- 00.MP7 PIPING R.2_BOM.XLS 파일 업로드 성공
- NIPPLE, PIPE 등 자재 분류 및 재질 추출
- ASTM A106, SCH 80, 1인치 사이즈 등 정확 파싱

🛠️ 기술 스택:
- FastAPI + PostgreSQL + SQLAlchemy
- pandas를 활용한 엑셀 파싱
- 외래키 제약조건 적용된 정규화 DB 설계

backend/app/main.py

@@ -1,23 +1,25 @@
-
 from fastapi import FastAPI, Depends, HTTPException
 from fastapi.middleware.cors import CORSMiddleware
 from sqlalchemy.orm import Session
 from sqlalchemy import text
 from typing import List
+from datetime import datetime
 
-from . import models, schemas
-from .database import SessionLocal, engine, get_db
+from .database import get_db, engine
+from .models import Base, Project
+from .schemas import ProjectCreate, ProjectResponse
+from .api import files
 
-# 데이터베이스 테이블 생성 (이미 존재하면 무시)
-models.Base.metadata.create_all(bind=engine)
+Base.metadata.create_all(bind=engine)
 
 app = FastAPI(
-    title="TK-MP BOM System API",
-    description="BOM (Bill of Materials) 시스템 API - 실제 데이터베이스 연동",
-    version="2.0.0"
+    title="TK-MP-Project API",
+    description="BOM 시스템 개발 프로젝트 - Phase 3: 파일 처리 시스템",
+    version="1.0.0",
+    docs_url="/docs",
+    redoc_url="/redoc"
 )
 
-# CORS 설정
 app.add_middleware(
     CORSMiddleware,
     allow_origins=["*"],
@@ -26,62 +28,101 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
+app.include_router(files.router, prefix="/api/files", tags=["파일 관리"])
+
 @app.get("/")
 async def root():
     return {
-        "message": "TK-MP BOM System API", 
-        "version": "2.0.0",
+        "message": "TK-MP-Project API Server",
+        "version": "1.0.0 - Phase 3",
         "status": "running",
-        "database": "PostgreSQL 연결됨"
+        "timestamp": datetime.now().isoformat(),
+        "new_features": [
+            "✅ Phase 1: 기반 시스템 구축",
+            "✅ Phase 2: 데이터베이스 연동", 
+            "🔄 Phase 3: 파일 처리 시스템 개발 중"
+        ]
     }
 
 @app.get("/health")
 async def health_check(db: Session = Depends(get_db)):
     try:
-        # 데이터베이스 연결 테스트 (SQLAlchemy 2.0 문법)
-        result = db.execute(text("SELECT 1"))
+        result = db.execute(text("SELECT 1 as test"))
+        test_value = result.fetchone()[0]
+        
         return {
-            "status": "healthy", 
-            "database": "connected",
-            "api": "operational",
-            "version": "2.0.0",
-            "db_test": "SUCCESS"
+            "status": "healthy",
+            "database": "connected", 
+            "test_query": test_value == 1,
+            "timestamp": datetime.now().isoformat(),
+            "phase": "Phase 3 - 파일 처리 시스템"
         }
     except Exception as e:
-        return {
-            "status": "error",
-            "database": "disconnected", 
-            "error": str(e)
-        }
+        raise HTTPException(status_code=500, detail=f"데이터베이스 연결 실패: {str(e)}")
 
-# 프로젝트 API
-@app.get("/api/projects", response_model=schemas.ProjectResponse)
+@app.get("/api/projects", response_model=List[ProjectResponse])
 async def get_projects(db: Session = Depends(get_db)):
     try:
-        projects = db.query(models.Project).all()
-        return {
-            "projects": projects,
-            "total": len(projects),
-            "message": f"총 {len(projects)}개 프로젝트 조회됨"
-        }
+        result = db.execute(text("""
+            SELECT id, official_project_code, project_name, design_project_code, 
+                   is_code_matched, status, created_at, updated_at
+            FROM projects 
+            ORDER BY created_at DESC
+        """))
+        projects = result.fetchall()
+        
+        return [
+            ProjectResponse(
+                id=project.id,
+                official_project_code=project.official_project_code,
+                project_name=project.project_name,
+                design_project_code=project.design_project_code,
+                is_code_matched=project.is_code_matched,
+                status=project.status,
+                created_at=project.created_at,
+                updated_at=project.updated_at
+            )
+            for project in projects
+        ]
     except Exception as e:
-        raise HTTPException(status_code=500, detail=f"데이터베이스 오류: {str(e)}")
+        raise HTTPException(status_code=500, detail=f"프로젝트 조회 실패: {str(e)}")
 
-@app.post("/api/projects", response_model=schemas.Project)
-async def create_project(project: schemas.ProjectCreate, db: Session = Depends(get_db)):
+@app.post("/api/projects", response_model=ProjectResponse)
+async def create_project(project: ProjectCreate, db: Session = Depends(get_db)):
     try:
-        db_project = models.Project(**project.dict())
-        db.add(db_project)
+        insert_query = text("""
+            INSERT INTO projects (official_project_code, project_name, design_project_code, is_code_matched, status, created_at)
+            VALUES (:official_code, :project_name, :design_code, :is_matched, :status, :created_at)
+            RETURNING id, official_project_code, project_name, design_project_code, is_code_matched, status, created_at, updated_at
+        """)
+        
+        result = db.execute(insert_query, {
+            "official_code": project.official_project_code,
+            "project_name": project.project_name,
+            "design_code": project.design_project_code,
+            "is_matched": project.is_code_matched,
+            "status": project.status,
+            "created_at": datetime.now()
+        })
+        
+        new_project = result.fetchone()
         db.commit()
-        db.refresh(db_project)
-        return db_project
+        
+        return ProjectResponse(
+            id=new_project.id,
+            official_project_code=new_project.official_project_code,
+            project_name=new_project.project_name,
+            design_project_code=new_project.design_project_code,
+            is_code_matched=new_project.is_code_matched,
+            status=new_project.status,
+            created_at=new_project.created_at,
+            updated_at=new_project.updated_at
+        )
+        
     except Exception as e:
         db.rollback()
-        raise HTTPException(status_code=500, detail=f"프로젝트 생성 오류: {str(e)}")
+        raise HTTPException(status_code=500, detail=f"프로젝트 생성 실패: {str(e)}")
 
-@app.get("/api/projects/{project_id}", response_model=schemas.Project)
-async def get_project(project_id: int, db: Session = Depends(get_db)):
-    project = db.query(models.Project).filter(models.Project.id == project_id).first()
-    if project is None:
-        raise HTTPException(status_code=404, detail="프로젝트를 찾을 수 없습니다")
-    return project
+if __name__ == "__main__":
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=8000, reload=True)