"""
import_xls_into_database_via_sqlalchemy.py

:copyright: (c) 2014-2017 by Onni Software Ltd.
:license: New BSD License, see LICENSE for more details

This code snippet shows you how to import data from an excel
file into a database table via sqlalchemy

created along with pyexcel v0.1.5.

Please install pyexcel-xls
"""
import os
import datetime

import pyexcel

from sqlalchemy import Date, Float, Column, String, Integer, create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base

engine = create_engine("sqlite:///birth.db")
Base = declarative_base()
Session = sessionmaker(bind=engine)


# here is the destination table
class BirthRegister(Base):
    __tablename__ = 'birth'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    weight = Column(Float)
    birth = Column(Date)


Base.metadata.create_all(engine)


# create fixture
data = [
    ["name", "weight", "birth"],
    ["Adam", 3.4, datetime.date(2017, 2, 3)],
    ["Smith", 4.2, datetime.date(2014, 11, 12)]
]
pyexcel.save_as(array=data,
                dest_file_name="birth.xls")

# import the xls file
session = Session()  # obtain a sql session
pyexcel.save_as(file_name="birth.xls",
                name_columns_by_row=0,
                dest_session=session,
                dest_table=BirthRegister)

# verify results
sheet = pyexcel.get_sheet(session=session, table=BirthRegister)
print(sheet)

session.close()
os.unlink('birth.db')
os.unlink("birth.xls")
