195 lines
7.5 KiB
Python
195 lines
7.5 KiB
Python
"""
|
|
Database models for replenishment planning.
|
|
"""
|
|
|
|
from sqlalchemy import Column, String, Integer, Numeric, Date, Boolean, ForeignKey, Text, TIMESTAMP, JSON
|
|
from sqlalchemy.dialects.postgresql import UUID, JSONB
|
|
from sqlalchemy.orm import relationship
|
|
import uuid
|
|
from datetime import datetime
|
|
|
|
from shared.database import Base
|
|
|
|
|
|
class ReplenishmentPlan(Base):
|
|
"""Replenishment plan master record"""
|
|
__tablename__ = "replenishment_plans"
|
|
|
|
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
|
|
tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)
|
|
|
|
# Planning metadata
|
|
planning_date = Column(Date, nullable=False)
|
|
projection_horizon_days = Column(Integer, nullable=False, default=7)
|
|
|
|
# References
|
|
forecast_id = Column(UUID(as_uuid=True), nullable=True)
|
|
production_schedule_id = Column(UUID(as_uuid=True), nullable=True)
|
|
|
|
# Summary statistics
|
|
total_items = Column(Integer, nullable=False, default=0)
|
|
urgent_items = Column(Integer, nullable=False, default=0)
|
|
high_risk_items = Column(Integer, nullable=False, default=0)
|
|
total_estimated_cost = Column(Numeric(12, 2), nullable=False, default=0)
|
|
|
|
# Status
|
|
status = Column(String(50), nullable=False, default='draft') # draft, approved, executed
|
|
|
|
# Timestamps
|
|
created_at = Column(TIMESTAMP(timezone=True), nullable=False, default=datetime.utcnow)
|
|
updated_at = Column(TIMESTAMP(timezone=True), nullable=True, onupdate=datetime.utcnow)
|
|
executed_at = Column(TIMESTAMP(timezone=True), nullable=True)
|
|
|
|
# Relationships
|
|
items = relationship("ReplenishmentPlanItem", back_populates="plan", cascade="all, delete-orphan")
|
|
|
|
|
|
class ReplenishmentPlanItem(Base):
|
|
"""Individual item in a replenishment plan"""
|
|
__tablename__ = "replenishment_plan_items"
|
|
|
|
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
|
|
replenishment_plan_id = Column(UUID(as_uuid=True), ForeignKey("replenishment_plans.id"), nullable=False, index=True)
|
|
|
|
# Ingredient info
|
|
ingredient_id = Column(UUID(as_uuid=True), nullable=False, index=True)
|
|
ingredient_name = Column(String(200), nullable=False)
|
|
unit_of_measure = Column(String(20), nullable=False)
|
|
|
|
# Quantities
|
|
base_quantity = Column(Numeric(12, 3), nullable=False)
|
|
safety_stock_quantity = Column(Numeric(12, 3), nullable=False, default=0)
|
|
shelf_life_adjusted_quantity = Column(Numeric(12, 3), nullable=False)
|
|
final_order_quantity = Column(Numeric(12, 3), nullable=False)
|
|
|
|
# Dates
|
|
order_date = Column(Date, nullable=False, index=True)
|
|
delivery_date = Column(Date, nullable=False)
|
|
required_by_date = Column(Date, nullable=False)
|
|
|
|
# Planning metadata
|
|
lead_time_days = Column(Integer, nullable=False)
|
|
is_urgent = Column(Boolean, nullable=False, default=False, index=True)
|
|
urgency_reason = Column(Text, nullable=True)
|
|
waste_risk = Column(String(20), nullable=False, default='low') # low, medium, high
|
|
stockout_risk = Column(String(20), nullable=False, default='low') # low, medium, high, critical
|
|
|
|
# Supplier
|
|
supplier_id = Column(UUID(as_uuid=True), nullable=True)
|
|
|
|
# Calculation details (stored as JSONB)
|
|
safety_stock_calculation = Column(JSONB, nullable=True)
|
|
shelf_life_adjustment = Column(JSONB, nullable=True)
|
|
inventory_projection = Column(JSONB, nullable=True)
|
|
|
|
# Timestamps
|
|
created_at = Column(TIMESTAMP(timezone=True), nullable=False, default=datetime.utcnow)
|
|
|
|
# Relationships
|
|
plan = relationship("ReplenishmentPlan", back_populates="items")
|
|
|
|
|
|
class InventoryProjection(Base):
|
|
"""Daily inventory projection"""
|
|
__tablename__ = "inventory_projections"
|
|
|
|
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
|
|
tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)
|
|
|
|
# Ingredient
|
|
ingredient_id = Column(UUID(as_uuid=True), nullable=False, index=True)
|
|
ingredient_name = Column(String(200), nullable=False)
|
|
|
|
# Projection date
|
|
projection_date = Column(Date, nullable=False, index=True)
|
|
|
|
# Stock levels
|
|
starting_stock = Column(Numeric(12, 3), nullable=False)
|
|
forecasted_consumption = Column(Numeric(12, 3), nullable=False, default=0)
|
|
scheduled_receipts = Column(Numeric(12, 3), nullable=False, default=0)
|
|
projected_ending_stock = Column(Numeric(12, 3), nullable=False)
|
|
|
|
# Flags
|
|
is_stockout = Column(Boolean, nullable=False, default=False, index=True)
|
|
coverage_gap = Column(Numeric(12, 3), nullable=False, default=0) # Negative if stockout
|
|
|
|
# Reference to replenishment plan
|
|
replenishment_plan_id = Column(UUID(as_uuid=True), nullable=True)
|
|
|
|
# Timestamps
|
|
created_at = Column(TIMESTAMP(timezone=True), nullable=False, default=datetime.utcnow)
|
|
|
|
__table_args__ = (
|
|
# Unique constraint: one projection per ingredient per date per tenant
|
|
{'schema': None}
|
|
)
|
|
|
|
|
|
class SupplierAllocation(Base):
|
|
"""Supplier allocation for a requirement"""
|
|
__tablename__ = "supplier_allocations"
|
|
|
|
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
|
|
|
|
# References
|
|
replenishment_plan_item_id = Column(UUID(as_uuid=True), ForeignKey("replenishment_plan_items.id"), nullable=True, index=True)
|
|
requirement_id = Column(UUID(as_uuid=True), nullable=True, index=True) # Reference to procurement_requirements
|
|
|
|
# Supplier
|
|
supplier_id = Column(UUID(as_uuid=True), nullable=False, index=True)
|
|
supplier_name = Column(String(200), nullable=False)
|
|
|
|
# Allocation
|
|
allocation_type = Column(String(20), nullable=False) # primary, backup, diversification
|
|
allocated_quantity = Column(Numeric(12, 3), nullable=False)
|
|
allocation_percentage = Column(Numeric(5, 4), nullable=False) # 0.0000 - 1.0000
|
|
|
|
# Pricing
|
|
unit_price = Column(Numeric(12, 2), nullable=False)
|
|
total_cost = Column(Numeric(12, 2), nullable=False)
|
|
|
|
# Lead time
|
|
lead_time_days = Column(Integer, nullable=False)
|
|
|
|
# Scoring
|
|
supplier_score = Column(Numeric(5, 2), nullable=False)
|
|
score_breakdown = Column(JSONB, nullable=True)
|
|
|
|
# Reasoning
|
|
allocation_reason = Column(Text, nullable=True)
|
|
|
|
# Timestamps
|
|
created_at = Column(TIMESTAMP(timezone=True), nullable=False, default=datetime.utcnow)
|
|
|
|
|
|
class SupplierSelectionHistory(Base):
|
|
"""Historical record of supplier selections for analytics"""
|
|
__tablename__ = "supplier_selection_history"
|
|
|
|
id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
|
|
tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)
|
|
|
|
# Selection details
|
|
ingredient_id = Column(UUID(as_uuid=True), nullable=False, index=True)
|
|
ingredient_name = Column(String(200), nullable=False)
|
|
selected_supplier_id = Column(UUID(as_uuid=True), nullable=False, index=True)
|
|
selected_supplier_name = Column(String(200), nullable=False)
|
|
|
|
# Order details
|
|
selection_date = Column(Date, nullable=False, index=True)
|
|
quantity = Column(Numeric(12, 3), nullable=False)
|
|
unit_price = Column(Numeric(12, 2), nullable=False)
|
|
total_cost = Column(Numeric(12, 2), nullable=False)
|
|
|
|
# Metrics
|
|
lead_time_days = Column(Integer, nullable=False)
|
|
quality_score = Column(Numeric(5, 2), nullable=True)
|
|
delivery_performance = Column(Numeric(5, 2), nullable=True)
|
|
|
|
# Selection strategy
|
|
selection_strategy = Column(String(50), nullable=False) # single_source, dual_source, multi_source
|
|
was_primary_choice = Column(Boolean, nullable=False, default=True)
|
|
|
|
# Timestamps
|
|
created_at = Column(TIMESTAMP(timezone=True), nullable=False, default=datetime.utcnow)
|