flask_crud_app/definitions/models.py

from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import Enum, Integer, String, Date, Column
from config import item_attributes, sql_conf
from definitions.attribute import textAttribute, intAttribute, floatAttribute, dateAttribute, selectAttribute

# Initialize SQLAlchemy
db = SQLAlchemy()

def create_asset_model():
    """
    Dynamically creates the Asset model based on the configuration in item_attributes.
    """
    # Define the table name and basic methods
    attrs = {
        '__tablename__': sql_conf.SQL_TABLE,  # Table name from config
        '__init__': lambda self, **kwargs: self.__dict__.update(kwargs),  # Constructor
        '__repr__': lambda self: f"<Asset {getattr(self, next(attrib.attrib_name for attrib in item_attributes if attrib.primary))}>"  # Representation
    }

    # Define columns based on item_attributes
    for attrib in item_attributes:
        # Determine the column type
        if isinstance(attrib, textAttribute):
            column_type = String(50)
        elif isinstance(attrib, dateAttribute):
            column_type = Date
        elif isinstance(attrib, selectAttribute):
            column_type = Enum(*attrib.options)
        elif isinstance(attrib, (intAttribute, floatAttribute)):
            column_type = Integer if isinstance(attrib, intAttribute) else Float
        else:
            raise ValueError(f"Unsupported attribute type: {type(attrib)}")

        # Define the column with additional properties
        attrs[attrib.attrib_name] = Column(
            column_type,
            primary_key=attrib.primary,
            unique=attrib.unique,
            nullable=not attrib.required,
            default=attrib.default_val
        )

    # Create the Asset class dynamically
    Asset = type('Asset', (db.Model,), attrs)
    return Asset

# Create the Asset model
Asset = create_asset_model()