"""empty message

Revision ID: c141a63b2487
Revises: cb6ab141c522
Create Date: 2020-07-09 00:05:39.845465

"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy import orm, func
from app.models import Package, PackageRelease


# revision identifiers, used by Alembic.
revision = 'c141a63b2487'
down_revision = 'cb6ab141c522'
branch_labels = None
depends_on = None


def upgrade():
	op.add_column('package', sa.Column('downloads', sa.Integer(), nullable=False, server_default="0"))

	bind = op.get_bind()
	session = orm.Session(bind=bind)

	for package in session.query(Package).all():
		downloads_result = session.query(func.sum(PackageRelease.downloads)).filter_by(package_id=package.id).one_or_none()
		downloads = 0 if not downloads_result or not downloads_result[0] else downloads_result[0]
		package.downloads = downloads

	session.commit()


def downgrade():
	# ### commands auto generated by Alembic - please adjust! ###
	op.drop_column('package', 'downloads')
	# ### end Alembic commands ###