对于出库选单和Bom库的逻辑完善以及功能美化

inventory-backend/app/models/bom.py

@@ -1,21 +1,28 @@
 from app.extensions import db
 
+
 class BomTable(db.Model):
     __tablename__ = 'bom_table'
 
     id = db.Column(db.Integer, primary_key=True)
     parent_id = db.Column(db.Integer, db.ForeignKey('material_base.id'), nullable=False)
     child_id = db.Column(db.Integer, db.ForeignKey('material_base.id'), nullable=False)
+
     bom_no = db.Column(db.String(100), nullable=False, comment='BOM编号')
-    version = db.Column(db.String(50), nullable=False, default='v1', comment='版本')
+    version = db.Column(db.String(50), nullable=False, default='V1.0', comment='版本')
+
     dosage = db.Column(db.Numeric(19, 4), comment='个数')
-    loss_rate = db.Column(db.Numeric(5, 2), comment='损耗率%(已废弃)', default=0, nullable=True)
+    loss_rate = db.Column(db.Numeric(5, 2), comment='损耗率%', default=0, nullable=True)
     remark = db.Column(db.Text, comment='备注')
 
+    # ★ 新增：启用状态
+    is_enabled = db.Column(db.Boolean, default=True, comment='是否启用')
+
+    # 约束: 保证同一版本下的父子对唯一，允许不同版本存在
     __table_args__ = (
-        db.UniqueConstraint('bom_no', 'parent_id', 'child_id', name='uniq_bom_no_parent_child'),
+        db.UniqueConstraint('bom_no', 'version', 'parent_id', 'child_id', name='uniq_bom_pair_in_version'),
     )
 
     # relationships
     parent = db.relationship('MaterialBase', foreign_keys=[parent_id], backref='bom_parents')
-    child = db.relationship('MaterialBase', foreign_keys=[child_id], backref='bom_children')
+    child = db.relationship('MaterialBase', foreign_keys=[child_id], backref='bom_children')