Anup Raj Gopinathan
66 lines
2.9 KiB
Python
66 lines
2.9 KiB
Python
from datetime import datetime, timezone
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from sqlalchemy import event
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from .. import db
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class CostFactor(db.Model):
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"""Model for storing cost factors that can be managed via admin interface"""
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__tablename__ = 'cost_factors'
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id = db.Column(db.Integer, primary_key=True)
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category = db.Column(db.String(50), nullable=False) # 'mold', 'complexity', 'texture', 'tax'
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subcategory = db.Column(db.String(50)) # For mold types: 'Rubber', 'CMEVA', etc.
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name = db.Column(db.String(100), nullable=False) # Factor name
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factor_value = db.Column(db.Float, nullable=False) # The actual factor value
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calculation_formula = db.Column(db.String(200)) # For complexity factors
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percentage = db.Column(db.String(20)) # For display purposes
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description = db.Column(db.String(500))
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is_active = db.Column(db.Boolean, default=True)
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created_at = db.Column(db.DateTime, default=datetime.utcnow)
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updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
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updated_by = db.Column(db.Integer, db.ForeignKey('enterprise_users.id'))
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# Relationship
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updater = db.relationship('User', backref='cost_factor_updates')
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__table_args__ = (
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db.Index('ix_cost_factor_category', category),
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db.Index('ix_cost_factor_name', name),
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db.Index('ix_cost_factor_active', is_active),
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)
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def __repr__(self):
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return f'<CostFactor {self.category}:{self.name}={self.factor_value}>'
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class CostFactorHistory(db.Model):
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"""Model for tracking changes to cost factors"""
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__tablename__ = 'cost_factor_history'
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id = db.Column(db.Integer, primary_key=True)
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cost_factor_id = db.Column(db.Integer, db.ForeignKey('cost_factors.id'), nullable=False)
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old_value = db.Column(db.Float)
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new_value = db.Column(db.Float, nullable=False)
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changed_by = db.Column(db.Integer, db.ForeignKey('enterprise_users.id'), nullable=False)
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changed_at = db.Column(db.DateTime, default=datetime.utcnow)
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change_reason = db.Column(db.String(500))
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# Relationships
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cost_factor = db.relationship('CostFactor', backref='history')
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user = db.relationship('User', backref='cost_factor_changes')
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__table_args__ = (
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db.Index('ix_cost_factor_history_factor_id', cost_factor_id),
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db.Index('ix_cost_factor_history_changed_at', changed_at),
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)
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def __repr__(self):
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return f'<CostFactorHistory {self.cost_factor_id}:{self.old_value}->{self.new_value}>'
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# Event listeners for model changes
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@event.listens_for(CostFactor, 'before_insert')
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def set_cost_factor_timestamps(mapper, connection, target):
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target.created_at = datetime.now(timezone.utc)
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target.updated_at = datetime.now(timezone.utc)
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@event.listens_for(CostFactor, 'before_update')
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def set_cost_factor_update_timestamp(mapper, connection, target):
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target.updated_at = datetime.now(timezone.utc) |