superset/migrations/versions/67a6ac9b727b_update_spatial_params.py

"""update_spatial_params

Revision ID: 67a6ac9b727b
Revises: 4736ec66ce19
Create Date: 2017-12-08 08:19:21.148775

"""
import json

from alembic import op
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, Text

from superset import db

# revision identifiers, used by Alembic.
revision = '67a6ac9b727b'
down_revision = '4736ec66ce19'

Base = declarative_base()


class Slice(Base):
    __tablename__ = 'slices'
    id = Column(Integer, primary_key=True)
    viz_type = Column(String(250))
    params = Column(Text)


def upgrade():
    bind = op.get_bind()
    session = db.Session(bind=bind)

    for slc in session.query(Slice).filter(Slice.viz_type.like('deck_%')):
        params = json.loads(slc.params)
        if params.get('latitude'):
            params['spatial'] = {
                'lonCol': params.get('longitude'),
                'latCol': params.get('latitude'),
                'type': 'latlong',
            }
            del params['latitude']
            del params['longitude']
        slc.params = json.dumps(params)
        session.merge(slc)
        session.commit()
    session.close()


def downgrade():
    pass