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Support SQLite ALTER with batch feature during alembic migrate

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Fix #404
This commit is contained in:
Ymage 2018-11-24 12:04:23 +01:00
parent 2f39512b65
commit 94becb35c6
3 changed files with 12 additions and 7 deletions
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1
migrations/env.py
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@ -73,6 +73,7 @@ def run_migrations_online():
context.configure(connection=connection,
target_metadata=target_metadata,
process_revision_directives=process_revision_directives,
render_as_batch=config.get_main_option('sqlalchemy.url').startswith('sqlite:'),
**current_app.extensions['migrate'].configure_args)
try:

10
migrations/versions/1274ed462010_change_setting_value_data_type.py
View File

@ -33,8 +33,9 @@ def update_data():
)
def upgrade():
# change column data type
op.alter_column('setting', 'value', existing_type=sa.String(256), type_=sa.Text())
with op.batch_alter_table('setting') as batch_op:
# change column data type
batch_op.alter_column('value', existing_type=sa.String(256), type_=sa.Text())
# update data for new schema
update_data()
@ -42,5 +43,6 @@ def upgrade():
def downgrade():
# delete added records in previous version
op.execute("DELETE FROM setting WHERE id > 41")
# change column data type
op.alter_column('setting', 'value', existing_type=sa.Text(), type_=sa.String(256))
with op.batch_alter_table('setting') as batch_op:
# change column data type
batch_op.alter_column('value', existing_type=sa.Text(), type_=sa.String(256))

8
migrations/versions/1274ed462010_remove_all_settings_in_the_db.py
View File

@ -23,8 +23,10 @@ def upgrade():
# written to the DB.
op.execute("DELETE FROM setting")
# drop view column since we don't need it
op.drop_column('setting', 'view')
with op.batch_alter_table('setting') as batch_op:
# drop view column since we don't need it
batch_op.drop_column('view')
def downgrade():
op.add_column('setting', sa.Column('view', sa.String(length=64), nullable=True))
with op.batch_alter_table('setting') as batch_op:
batch_op.add_column(sa.Column('view', sa.String(length=64), nullable=True))