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Use inspect_table inplace of redefining them all

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Just like we would have in sqlalchemy-migration inspect_table works and
is better than constantly redefining a table in the migration. This switches
the migration to use that method.
This commit is contained in:
Jessica Tallon 2016-01-18 10:29:01 +00:00
parent 2ddebb97bf
commit 83d9b6c3f6
1 changed files with 11 additions and 37 deletions
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48
mediagoblin/db/migrations/versions/101510e3a713_removes_graveyard_items_from_.py
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@ -10,40 +10,9 @@ Create Date: 2016-01-12 10:46:26.486610
revision = '101510e3a713' revision = '101510e3a713'
down_revision = '52bf0ccbedc1' down_revision = '52bf0ccbedc1'
from sqlalchemy import MetaData
from alembic import op from alembic import op
from mediagoblin.db.migration_tools import inspect_table
import sqlalchemy as sa
from sqlalchemy.sql import and_
# Create the tables to query
gmr_table = sa.Table(
"core__generic_model_reference",
sa.MetaData(),
sa.Column("id", sa.Integer, primary_key=True),
sa.Column("obj_pk", sa.Integer),
sa.Column("model_type", sa.Unicode)
)
graveyard_table = sa.Table(
"core__graveyard",
sa.MetaData(),
sa.Column("id", sa.Integer, primary_key=True),
sa.Column("public_id", sa.Unicode, unique=True),
sa.Column("deleted", sa.DateTime, nullable=False),
sa.Column("object_type", sa.Unicode, nullable=False),
sa.Column("actor_id", sa.Integer)
)
collection_items_table = sa.Table(
"core__collection_items",
sa.MetaData(),
sa.Column("id", sa.Integer, primary_key=True),
sa.Column("collection", sa.Integer, nullable=False),
sa.Column("note", sa.UnicodeText),
sa.Column("added", sa.DateTime, nullable=False),
sa.Column("position", sa.Integer),
sa.Column("object_id", sa.Integer, index=True)
)
def upgrade(): def upgrade():
""" """
@ -55,11 +24,16 @@ def upgrade():
This migration is to remove any Graveyard objects (tombstones) from any This migration is to remove any Graveyard objects (tombstones) from any
Collection. Collection.
""" """
connection = op.get_bind() db = op.get_bind()
metadata = MetaData(bind=db)
for tombstone in connection.execute(graveyard_table.select()): gmr_table = inspect_table(metadata, "core__generic_model_reference")
collection_items_table = inspect_table(metadata, "core__collection_items")
graveyard_table = inspect_table(metadata, "core__graveyard")
for tombstone in db.execute(graveyard_table.select()):
# Get GMR for tombstone # Get GMR for tombstone
gmr = connection.execute(gmr_table.select().where(and_( gmr = db.execute(gmr_table.select().where(and_(
gmr_table.c.obj_pk == tombstone.id, gmr_table.c.obj_pk == tombstone.id,
gmr_table.c.model_type == "core__graveyard" gmr_table.c.model_type == "core__graveyard"
))).first() ))).first()
@ -70,7 +44,7 @@ def upgrade():
continue continue
# Delete all the CollectionItem objects for this GMR # Delete all the CollectionItem objects for this GMR
connection.execute(collection_items_table.delete().where( db.execute(collection_items_table.delete().where(
collection_items_table.c.object_id == gmr.id collection_items_table.c.object_id == gmr.id
)) ))