Comparison_Project/app/models/laying_model.py

from app import db
from datetime import datetime

class Laying(db.Model):
    __tablename__ = "laying"

    id = db.Column(db.Integer, primary_key=True)
    #  Foreign Key to Subcontractor tables
    subcontractor_id = db.Column(db.Integer, db.ForeignKey("subcontractors.id"), nullable=False)
    # Relationship for easy access (subcontractor.subcontractor_name)
    subcontractor = db.relationship("Subcontractor", backref="laying_records")

    # Pipe Laying Fields
    Location = db.Column(db.String(500))
    MH_NO = db.Column(db.String(100))
    CC_length = db.Column(db.Float)
    Pipe_Dia_mm = db.Column(db.Float)
    ID_of_MH_m = db.Column(db.Float)
    Laying_Length = db.Column(db.Float)

    pipe_150_mm = db.Column(db.Float)
    pipe_200_mm = db.Column(db.Float)
    pipe_250_mm = db.Column(db.Float)
    pipe_300_mm = db.Column(db.Float)
    pipe_350_mm = db.Column(db.Float)
    pipe_400_mm = db.Column(db.Float)
    pipe_450_mm = db.Column(db.Float)
    pipe_500_mm = db.Column(db.Float)
    pipe_600_mm = db.Column(db.Float)
    pipe_700_mm = db.Column(db.Float)
    pipe_900_mm = db.Column(db.Float)
    pipe_1200_mm = db.Column(db.Float)
    
    Total = db.Column(db.Float)
    Remarks = db.Column(db.String(500))
    RA_Bill_No=db.Column(db.String(500))
    
    created_at = db.Column(db.DateTime, default=datetime.today)


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

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

    def sum_laying_fields():
        return [
            "pipe_150_mm", "pipe_200_mm", "pipe_250_mm",
            "pipe_300_mm", "pipe_350_mm", "pipe_400_mm",
            "pipe_450_mm", "pipe_500_mm", "pipe_600_mm",
            "pipe_700_mm", "pipe_900_mm", "pipe_1200_mm"
        ]