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51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
import enum
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from sqlalchemy import Column, Integer, String, Float, Enum, TIMESTAMP
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from sqlalchemy.orm import declarative_base
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from sqlalchemy.sql import func
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Base = declarative_base()
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class MaterialType(enum.Enum):
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suspended_floor_insulation = "suspended_floor_insulation"
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solid_floor_insulation = "solid_floor_insulation"
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external_wall_insulation = "external_wall_insulation"
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internal_wall_insulation = "internal_wall_insulation"
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class DepthUnit(enum.Enum):
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mm = "mm"
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class CostUnit(enum.Enum):
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gbp_sq_meter = "gbp_sq_meter"
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class RValueUnit(enum.Enum):
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square_meter_kelvin_per_watt = "square_meter_kelvin_per_watt"
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class ThermalConductivityUnit(enum.Enum):
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watt_per_meter_kelvin = "watt_per_meter_kelvin"
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class Material(Base):
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__tablename__ = 'material'
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id = Column(Integer, primary_key=True, autoincrement=True)
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type = Column(Enum(MaterialType, values_callable=lambda x: [e.value for e in x]), nullable=False)
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description = Column(String, nullable=False)
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depths = Column(String) # You may want to use a specific JSON type depending on the database
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depth_unit = Column(Enum(DepthUnit, values_callable=lambda x: [e.value for e in x]), nullable=False)
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cost = Column(Float)
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cost_unit = Column(Enum(CostUnit, values_callable=lambda x: [e.value for e in x]), nullable=False)
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r_value_per_mm = Column(Float)
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r_value_unit = Column(Enum(RValueUnit, values_callable=lambda x: [e.value for e in x]), nullable=False)
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thermal_conductivity = Column(Float)
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thermal_conductivity_unit = Column(
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Enum(ThermalConductivityUnit, values_callable=lambda x: [e.value for e in x]),
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nullable=False
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)
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link = Column(String)
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created_at = Column(TIMESTAMP, nullable=False, server_default=func.now())
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