1st

models.py

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+from flask_sqlalchemy import SQLAlchemy
+from flask_login import UserMixin
+from datetime import datetime
+
+db = SQLAlchemy()
+
+class User(db.Model, UserMixin):
+    # 修改 table name
+    __tablename__ = 'ts_user'
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String(50), unique=True, nullable=False)
+    password_hash = db.Column(db.String(255), nullable=False)
+    role = db.Column(db.Enum('viewer', 'editor', 'admin'), nullable=False)
+    last_login = db.Column(db.DateTime)
+
+class TempSpec(db.Model):
+    # 新增並設定 table name
+    __tablename__ = 'ts_temp_spec'
+    id = db.Column(db.Integer, primary_key=True)
+    spec_code = db.Column(db.String(20), nullable=False)
+    applicant = db.Column(db.String(50))
+    title = db.Column(db.String(100))
+    content = db.Column(db.Text)
+    start_date = db.Column(db.Date)
+    end_date = db.Column(db.Date)
+    status = db.Column(db.Enum('pending_approval', 'active', 'expired', 'terminated'), nullable=False, default='pending_approval')
+    created_at = db.Column(db.DateTime)
+    extension_count = db.Column(db.Integer, default=0)
+    termination_reason = db.Column(db.Text, nullable=True)
+
+    # 關聯到 Upload 和 SpecHistory，並設定級聯刪除
+    uploads = db.relationship('Upload', back_populates='spec', cascade='all, delete-orphan')
+    history = db.relationship('SpecHistory', back_populates='spec', cascade='all, delete-orphan')
+
+class Upload(db.Model):
+    # 新增並設定 table name
+    __tablename__ = 'ts_upload'
+    id = db.Column(db.Integer, primary_key=True)
+    # 注意：這裡的 ForeignKey 也要更新為新的 table name
+    temp_spec_id = db.Column(db.Integer, db.ForeignKey('ts_temp_spec.id', ondelete='CASCADE'), nullable=False)
+    filename = db.Column(db.String(200))
+    upload_time = db.Column(db.DateTime)
+    
+    spec = db.relationship('TempSpec', back_populates='uploads')
+
+class SpecHistory(db.Model):
+    # 修改 table name
+    __tablename__ = 'ts_spec_history'
+    id = db.Column(db.Integer, primary_key=True)
+    # 注意：這裡的 ForeignKey 也要更新為新的 table name
+    spec_id = db.Column(db.Integer, db.ForeignKey('ts_temp_spec.id', ondelete='CASCADE'), nullable=False)
+    user_id = db.Column(db.Integer, db.ForeignKey('ts_user.id', ondelete='SET NULL'), nullable=True)
+    action = db.Column(db.String(50), nullable=False)
+    details = db.Column(db.Text, nullable=True)
+    timestamp = db.Column(db.DateTime, default=datetime.utcnow)
+
+    # 建立與 User 和 TempSpec 的關聯，方便查詢
+    user = db.relationship('User')
+    spec = db.relationship('TempSpec', back_populates='history')