"""moving icons to their own table

Revision ID: 25ca960a207
Revises: 19bdaa6208e
Create Date: 2015-08-03 14:36:21.626411

"""

# revision identifiers, used by Alembic.
revision = '25ca960a207'
down_revision = '19bdaa6208e'

from alembic import op
import sqlalchemy as sa

import conf


def upgrade():
    op.create_table('icon',
            sa.Column('url', sa.String(), nullable=False),
            sa.Column('content', sa.String(), nullable=True),
            sa.Column('mimetype', sa.String(), nullable=True),
            sa.PrimaryKeyConstraint('url'))
    op.add_column('feed', sa.Column('icon_url', sa.String(), nullable=True))
    if 'sqlite' not in conf.SQLALCHEMY_DATABASE_URI:
        op.create_foreign_key(None, 'feed', 'icon', ['icon_url'], ['url'])
        op.drop_column('feed', 'icon')


def downgrade():
    op.add_column('feed', sa.Column('icon', sa.VARCHAR(), nullable=True))
    if 'sqlite' not in conf.SQLALCHEMY_DATABASE_URI:
        op.drop_constraint(None, 'feed', type_='foreignkey')
        op.drop_column('feed', 'icon_url')
    op.drop_table('icon')