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[migrations] Fix time grain SQLA (#5135)
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superset/migrations/versions/c5756bec8b47_time_grain_sqla.py
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superset/migrations/versions/c5756bec8b47_time_grain_sqla.py
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"""Time grain SQLA
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Revision ID: c5756bec8b47
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Revises: e502db2af7be
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Create Date: 2018-06-04 11:12:59.878742
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"""
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# revision identifiers, used by Alembic.
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revision = 'c5756bec8b47'
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down_revision = 'e502db2af7be'
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from alembic import op
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import json
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy import Column, Integer, String, Text
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from superset import db
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Base = declarative_base()
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class Slice(Base):
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__tablename__ = 'slices'
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id = Column(Integer, primary_key=True)
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datasource_type = Column(String(200))
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slice_name = Column(String(250))
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params = Column(Text)
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def upgrade():
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bind = op.get_bind()
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session = db.Session(bind=bind)
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for slc in session.query(Slice).all():
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try:
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params = json.loads(slc.params)
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if params.get('time_grain_sqla') == 'Time Column':
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params['time_grain_sqla'] = None
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slc.params = json.dumps(params, sort_keys=True)
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except Exception:
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pass
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session.commit()
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session.close()
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def downgrade():
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bind = op.get_bind()
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session = db.Session(bind=bind)
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for slc in session.query(Slice).all():
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try:
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params = json.loads(slc.params)
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if params.get('time_grain_sqla') is None:
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params['time_grain_sqla'] = 'Time Column'
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slc.params = json.dumps(params, sort_keys=True)
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except Exception:
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pass
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session.commit()
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session.close()
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