superset/migrations/versions/e866bd2d4976_smaller_grid.py

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"""smaller_grid
Revision ID: e866bd2d4976
Revises: 21e88bc06c02
Create Date: 2018-02-13 08:07:40.766277
"""
import json

import sqlalchemy as sa
from alembic import op
from flask_appbuilder.models.mixins import AuditMixin
from sqlalchemy.ext.declarative import declarative_base

from superset import db

revision = "e866bd2d4976"
down_revision = "21e88bc06c02"

Base = declarative_base()
RATIO = 4


class Dashboard(Base):
    """Declarative class to do query in upgrade"""

    __tablename__ = "dashboards"
    id = sa.Column(sa.Integer, primary_key=True)
    position_json = sa.Column(sa.Text)
    dashboard_title = sa.Column(sa.String(500))


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

    dashboards = session.query(Dashboard).all()
    for i, dashboard in enumerate(dashboards):
        print("Upgrading ({}/{}): {}".format(i, len(dashboards), dashboard.id))
        positions = json.loads(dashboard.position_json or "{}")
        for pos in positions:
            if pos.get("v", 0) == 0:
                pos["size_x"] = pos["size_x"] * RATIO
                pos["size_y"] = pos["size_y"] * RATIO
                pos["col"] = ((pos["col"] - 1) * RATIO) + 1
                pos["row"] = pos["row"] * RATIO
                pos["v"] = 1

        dashboard.position_json = json.dumps(positions, indent=2)
        session.merge(dashboard)
        session.commit()

    session.close()


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

    dashboards = session.query(Dashboard).all()
    for i, dashboard in enumerate(dashboards):
        print("Downgrading ({}/{}): {}".format(i, len(dashboards), dashboard.id))
        positions = json.loads(dashboard.position_json or "{}")
        for pos in positions:
            if pos.get("v", 0) == 1:
                pos["size_x"] = pos["size_x"] / 4
                pos["size_y"] = pos["size_y"] / 4
                pos["col"] = ((pos["col"] - 1) / 4) + 1
                pos["row"] = pos["row"] / 4
                pos["v"] = 0

        dashboard.position_json = json.dumps(positions, indent=2)
        session.merge(dashboard)
        session.commit()
    pass