Comparison_Project/app/models/mh_dc_client_model.py

from app import db
from datetime import datetime
from sqlalchemy import event
from app.utils.regex_utils import RegularExpression
from decimal import Decimal

class ManholeDomesticChamberClient(db.Model):
    __tablename__ = "mh_dc_client"

    id = db.Column(db.Integer, primary_key=True)

    # Basic Fields
    RA_Bill_No = db.Column(db.String(500))
    Location = db.Column(db.String(500))
    MH_NO = db.Column(db.String(100))
    MH_TOP_LEVEL = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    MH_IL_LEVEL = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    Depth_of_MH = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
   
    # Excavation categories 
    d_0_to_1_5 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_1_5_to_2_0 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_2_0_to_2_5 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_2_5_to_3_0 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_3_0_to_3_5 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_3_5_to_4_0 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_4_0_to_4_5= db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_4_5_to_5_0 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_5_0_to_5_5 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_5_5_to_6_0 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))
    d_6_0_to_6_5 = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))

    Domestic_Chambers = db.Column(db.Numeric(10, 2), default=Decimal("0.00"))

    Total = db.Column(db.Numeric(12, 2), default=Decimal("0.00"))
    Remarks = db.Column(db.String(500), default="Import File")
    created_at = db.Column(db.DateTime,default=datetime.now,nullable=False)

    def __repr__(self):
        return f"<HanholeDomesticChamberConstruction {self.Location}>"


    def serialize(self):
        return {c.name: getattr(self, c.name) for c in self.__table__.columns}


# AUTO TOTAL USING REGEX
def calculate_mh_dc_total(mapper, connection, target):
    total = Decimal("0.00")
    for column in target.__table__.columns:
        if RegularExpression.D_RANGE_PATTERN.match(column.name):
            value = getattr(target, column.name)
            if value is not None:
                total += Decimal(value)
    target.Total = total.quantize(Decimal("0.01"))

event.listen(ManholeDomesticChamberClient, "before_insert", calculate_mh_dc_total)
event.listen(ManholeDomesticChamberClient, "before_update", calculate_mh_dc_total)