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