Python alembic.op.drop_constraint() Examples

def upgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('fido',
    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
    sa.Column('created_at', sqlalchemy_utils.types.arrow.ArrowType(), nullable=False),
    sa.Column('updated_at', sqlalchemy_utils.types.arrow.ArrowType(), nullable=True),
    sa.Column('credential_id', sa.String(), nullable=False),
    sa.Column('uuid', sa.String(), nullable=False),
    sa.Column('public_key', sa.String(), nullable=False),
    sa.Column('sign_count', sa.Integer(), nullable=False),
    sa.Column('name', sa.String(length=128), nullable=False),
    sa.ForeignKeyConstraint(['uuid'], ['users.fido_uuid'], ondelete='cascade'),
    sa.PrimaryKeyConstraint('id'),
    sa.UniqueConstraint('public_key')
    )
    op.create_index(op.f('ix_fido_credential_id'), 'fido', ['credential_id'], unique=True)
    op.drop_constraint('users_fido_credential_id_key', 'users', type_='unique')
    op.drop_constraint('users_fido_pk_key', 'users', type_='unique')
    op.drop_column('users', 'fido_sign_count')
    op.drop_column('users', 'fido_pk')
    op.drop_column('users', 'fido_credential_id')
    # ### end Alembic commands ### 

def downgrade():
    """ Alter the pull_requests table to update the foreign key to cascade
    on delete.
    """

    op.drop_constraint(
        'pull_requests_project_id_from_fkey',
        'pull_requests',
        type_='foreignkey')
    op.create_foreign_key(
        name='pull_requests_project_id_from_fkey',
        source_table='pull_requests',
        referent_table='projects',
        local_cols=['project_id_from'],
        remote_cols=['id'],
        onupdate='cascade',
        ondelete='cascade',
    ) 

def upgrade():
    """ Alter the pull_requests table to update the foreign key to set null
    on delete.
    """

    op.drop_constraint(
        'pull_requests_project_id_from_fkey',
        'pull_requests',
        type_='foreignkey')
    op.create_foreign_key(
        name='pull_requests_project_id_from_fkey',
        source_table='pull_requests',
        referent_table='projects',
        local_cols=['project_id_from'],
        remote_cols=['id'],
        onupdate='cascade',
        ondelete='set null',
    ) 

def downgrade():
    bind = op.get_bind()
    session = Session(bind=bind)
    # ### commands auto generated by Alembic - please adjust! ###
    op.add_column('pull_mirror', sa.Column('gitlab_id', sa.INTEGER(), nullable=True))

    for pull_mirror in session.query(PullMirror):
        pull_mirror.gitlab_id = pull_mirror.project.gitlab_id
        session.add(pull_mirror)
    session.commit()

    op.drop_constraint(None, 'pull_mirror', type_='foreignkey')
    op.drop_index(op.f('ix_pull_mirror_project_id'), table_name='pull_mirror')
    op.drop_column('pull_mirror', 'project_id')
    op.drop_index(op.f('ix_push_mirror_user_id'), table_name='push_mirror')
    op.drop_index(op.f('ix_push_mirror_project_id'), table_name='push_mirror')
    op.drop_table('push_mirror')
    op.drop_table('project')
    # ### end Alembic commands ### 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.add_column('task_result', sa.Column('traceback', sa.TEXT(), autoincrement=False, nullable=True))
    op.add_column('task_result', sa.Column('task_id', sa.VARCHAR(length=155), autoincrement=False, nullable=True))
    op.add_column('task_result', sa.Column('date_done', postgresql.TIMESTAMP(), autoincrement=False, nullable=True))
    op.add_column('task_result', sa.Column('status', sa.VARCHAR(length=50), autoincrement=False, nullable=True))
    op.add_column('task_result', sa.Column('result', postgresql.BYTEA(), autoincrement=False, nullable=True))
    op.drop_constraint(None, 'task_result', type_='foreignkey')
    op.create_unique_constraint('task_result_task_id_key', 'task_result', ['task_id'])
    op.drop_index(op.f('ix_task_result_celery_taskmeta_id'), table_name='task_result')
    op.drop_column('task_result', 'celery_taskmeta_id')
    op.drop_table('celery_tasksetmeta')
    op.drop_table('celery_taskmeta')
    # ### end Alembic commands ### 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(op.f('fk_kernels_scaling_group_scaling_groups'), 'kernels', type_='foreignkey')
    op.drop_index(op.f('ix_kernels_scaling_group'), table_name='kernels')
    op.drop_column('kernels', 'scaling_group')
    op.drop_constraint(op.f('fk_agents_scaling_group_scaling_groups'), 'agents', type_='foreignkey')
    op.drop_index(op.f('ix_agents_scaling_group'), table_name='agents')
    op.drop_column('agents', 'scaling_group')
    op.drop_index(op.f('ix_sgroups_for_keypairs_scaling_group'), table_name='sgroups_for_keypairs')
    op.drop_index(op.f('ix_sgroups_for_keypairs_access_key'), table_name='sgroups_for_keypairs')
    op.drop_table('sgroups_for_keypairs')
    op.drop_index(op.f('ix_sgroups_for_groups_scaling_group'), table_name='sgroups_for_groups')
    op.drop_index(op.f('ix_sgroups_for_groups_group'), table_name='sgroups_for_groups')
    op.drop_table('sgroups_for_groups')
    op.drop_index(op.f('ix_sgroups_for_domains_scaling_group'), table_name='sgroups_for_domains')
    op.drop_index(op.f('ix_sgroups_for_domains_domain'), table_name='sgroups_for_domains')
    op.drop_table('sgroups_for_domains')
    op.drop_index(op.f('ix_scaling_groups_is_active'), table_name='scaling_groups')
    op.drop_table('scaling_groups')
    # ### end Alembic commands ### 

def upgrade():
    op.drop_constraint('fk_vfolder_attachment_vfolder_vfolders', 'vfolder_attachment', type_='foreignkey')
    op.drop_constraint('fk_vfolder_attachment_kernel_kernels', 'vfolder_attachment', type_='foreignkey')
    op.drop_constraint('pk_kernels', 'kernels', type_='primary')
    op.add_column('kernels',
                  sa.Column('id', GUID(),
                            server_default=sa.text('uuid_generate_v4()'),
                            nullable=False))
    op.add_column('kernels', sa.Column('role', sa.String(length=16), nullable=False, default='master'))
    op.create_primary_key('pk_kernels', 'kernels', ['id'])
    op.alter_column(
        'kernels', 'sess_id',
        existing_type=postgresql.UUID(),
        type_=sa.String(length=64),
        nullable=True,
        existing_server_default=sa.text('uuid_generate_v4()'))
    op.create_index(op.f('ix_kernels_sess_id'), 'kernels', ['sess_id'], unique=False)
    op.create_index(op.f('ix_kernels_sess_id_role'), 'kernels', ['sess_id', 'role'], unique=False)
    op.create_foreign_key('fk_vfolder_attachment_vfolder_vfolders',
                          'vfolder_attachment', 'vfolders',
                          ['vfolder'], ['id'], onupdate='CASCADE', ondelete='CASCADE')
    op.create_foreign_key('fk_vfolder_attachment_kernel_kernels',
                          'vfolder_attachment', 'kernels',
                          ['kernel'], ['id'], onupdate='CASCADE', ondelete='CASCADE') 

def upgrade():
    bind = op.get_bind()
    # NOTE(sileht): mysql can't delete an index on a foreign key
    # even this one is not the index used by the foreign key itself...
    # In our case we have two indexes fk_resource_history_id_resource_id and
    # and ix_resource_history_id, we want to delete only the second, but mysql
    # can't do that with a simple DROP INDEX ix_resource_history_id...
    # so we have to remove the constraint and put it back...
    if bind.engine.name == "mysql":
        op.drop_constraint("fk_resource_history_id_resource_id",
                           type_="foreignkey", table_name="resource_history")

    for table, colname in resource_tables + history_tables + other_tables:
        op.drop_index("ix_%s_%s" % (table, colname), table_name=table)

    if bind.engine.name == "mysql":
        op.create_foreign_key("fk_resource_history_id_resource_id",
                              "resource_history", "resource", ["id"], ["id"],
                              ondelete="CASCADE") 

def upgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.add_column('rss_parser_feed_name_lut', sa.Column('feed_id', sa.BigInteger(), nullable=False))
    op.create_index(op.f('ix_rss_parser_feed_name_lut_feed_id'), 'rss_parser_feed_name_lut', ['feed_id'], unique=False)
    op.drop_index('ix_rss_parser_feed_name_lut_feed_name', table_name='rss_parser_feed_name_lut')
    op.drop_constraint('rss_parser_feed_name_lut_feed_netloc_feed_name_key', 'rss_parser_feed_name_lut', type_='unique')
    op.create_unique_constraint(None, 'rss_parser_feed_name_lut', ['feed_netloc', 'feed_id'])
    op.drop_constraint('rss_parser_feed_name_lut_feed_name_fkey', 'rss_parser_feed_name_lut', type_='foreignkey')
    op.create_foreign_key(None, 'rss_parser_feed_name_lut', 'rss_parser_funcs', ['feed_id'], ['id'])
    op.drop_column('rss_parser_feed_name_lut', 'feed_name')
    op.add_column('rss_parser_feed_name_lut_version', sa.Column('feed_id', sa.BigInteger(), autoincrement=False, nullable=True))
    op.create_index(op.f('ix_rss_parser_feed_name_lut_version_feed_id'), 'rss_parser_feed_name_lut_version', ['feed_id'], unique=False)
    op.drop_index('ix_rss_parser_feed_name_lut_version_feed_name', table_name='rss_parser_feed_name_lut_version')
    op.drop_column('rss_parser_feed_name_lut_version', 'feed_name')
    op.alter_column('rss_parser_funcs', 'func',
               existing_type=sa.TEXT(),
               nullable=True)
    ### end Alembic commands ### 

def downgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.alter_column('rss_parser_funcs', 'func',
               existing_type=sa.TEXT(),
               nullable=False)
    op.add_column('rss_parser_feed_name_lut_version', sa.Column('feed_name', sa.TEXT(), autoincrement=False, nullable=True))
    op.create_index('ix_rss_parser_feed_name_lut_version_feed_name', 'rss_parser_feed_name_lut_version', ['feed_name'], unique=False)
    op.drop_index(op.f('ix_rss_parser_feed_name_lut_version_feed_id'), table_name='rss_parser_feed_name_lut_version')
    op.drop_column('rss_parser_feed_name_lut_version', 'feed_id')
    op.add_column('rss_parser_feed_name_lut', sa.Column('feed_name', sa.TEXT(), autoincrement=False, nullable=False))
    op.drop_constraint(None, 'rss_parser_feed_name_lut', type_='foreignkey')
    op.create_foreign_key('rss_parser_feed_name_lut_feed_name_fkey', 'rss_parser_feed_name_lut', 'rss_parser_funcs', ['feed_name'], ['feed_name'])
    op.drop_constraint(None, 'rss_parser_feed_name_lut', type_='unique')
    op.create_unique_constraint('rss_parser_feed_name_lut_feed_netloc_feed_name_key', 'rss_parser_feed_name_lut', ['feed_netloc', 'feed_name'])
    op.create_index('ix_rss_parser_feed_name_lut_feed_name', 'rss_parser_feed_name_lut', ['feed_name'], unique=False)
    op.drop_index(op.f('ix_rss_parser_feed_name_lut_feed_id'), table_name='rss_parser_feed_name_lut')
    op.drop_column('rss_parser_feed_name_lut', 'feed_id')
    ### end Alembic commands ### 

def upgrade():
    conn = op.get_bind()

    insp = inspect(conn)
    fk_names = [fk['name'] for fk in insp.get_foreign_keys('host')]
    if ("fk_hypervisor_id_resource_id" not in fk_names and
            "fk_host_id_resource_id" in fk_names):
        # NOTE(sileht): we are already good, the BD have been created from
        # scratch after "a54c57ada3f5"
        return

    op.drop_constraint("fk_hypervisor_id_resource_id", "host",
                       type_="foreignkey")
    op.drop_constraint("fk_hypervisor_history_resource_history_revision",
                       "host_history", type_="foreignkey")
    op.create_foreign_key("fk_host_id_resource_id", "host", "resource",
                          ["id"], ["id"], ondelete="CASCADE")
    op.create_foreign_key("fk_host_history_resource_history_revision",
                          "host_history", "resource_history",
                          ["revision"], ["revision"], ondelete="CASCADE") 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.add_column('web_pages_version', sa.Column('is_delta', sa.BOOLEAN(), autoincrement=False, nullable=True))
    op.drop_constraint(None, 'web_pages_version', type_='foreignkey')
    op.drop_column('web_pages_version', 'parent_hash')
    op.drop_column('web_pages_version', 'data_hash')
    op.add_column('rss_parser_funcs_version', sa.Column('is_delta', sa.BOOLEAN(), autoincrement=False, nullable=True))
    op.drop_constraint(None, 'rss_parser_funcs_version', type_='foreignkey')
    op.drop_column('rss_parser_funcs_version', 'parent_hash')
    op.drop_column('rss_parser_funcs_version', 'data_hash')
    op.add_column('rss_parser_feed_name_lut_version', sa.Column('is_delta', sa.BOOLEAN(), autoincrement=False, nullable=True))
    op.drop_constraint(None, 'rss_parser_feed_name_lut_version', type_='foreignkey')
    op.drop_column('rss_parser_feed_name_lut_version', 'parent_hash')
    op.drop_column('rss_parser_feed_name_lut_version', 'data_hash')
    op.add_column('raw_web_pages_version', sa.Column('is_delta', sa.BOOLEAN(), autoincrement=False, nullable=True))
    op.drop_constraint(None, 'raw_web_pages_version', type_='foreignkey')
    op.drop_column('raw_web_pages_version', 'parent_hash')
    op.drop_column('raw_web_pages_version', 'data_hash')
    # ### end Alembic commands ### 

def upgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint('nu_outbound_wrappers_client_id_client_key_seriesname_releas_key', 'nu_outbound_wrappers', type_='unique')
    op.create_unique_constraint(None, 'nu_outbound_wrappers', ['client_id', 'client_key', 'seriesname', 'releaseinfo', 'groupinfo', 'actual_target'])
    ### end Alembic commands ### 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(None, 'user', type_='foreignkey')
    op.drop_column('user', 'default_transfer_account_id')
    # ### end Alembic commands ### 

def downgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(None, 'feed_pages', type_='foreignkey')
    op.drop_index(op.f('ix_feed_pages_feed_id'), table_name='feed_pages')
    op.drop_column('feed_pages', 'feed_id')
    ### end Alembic commands ### 

def downgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(None, 'nu_outbound_wrappers', type_='unique')
    ### end Alembic commands ### 

def downgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(None, 'nu_outbound_wrappers', type_='unique')
    op.create_unique_constraint('nu_outbound_wrappers_client_id_client_key_seriesname_releas_key', 'nu_outbound_wrappers', ['client_id', 'client_key', 'seriesname', 'releaseinfo', 'groupinfo'])
    ### end Alembic commands ### 

def upgrade():
    """ Drop the pull_request_check constraint. """
    connection = op.get_bind()
    connection.begin_nested()
    try:
        op.drop_constraint("pull_requests_check", "pull_requests")
    except sa.exc.ProgrammingError:
        connection.connection.connection.rollback()
        print(
            'Ignoring the pull_requests_check '
            'constraint if it does not exist') 

def downgrade():
    """ Remove the existing foreign key in pull_request_flags.token_id and
    re-create it with without specifying the behavior on delete and update.
    """
    op.drop_constraint(
        'pull_request_flags_token_id_fkey', 'pull_request_flags',
        type_='foreignkey')
    op.create_foreign_key(
        u'pull_request_flags_token_id_fkey',
        'pull_request_flags',
        'tokens',
        ['token_id'],
        ['id'],
    ) 

def upgrade():
    """ Remove the constraint named: commit_flags_uid_key, pass otherwise. """
    try:
        op.drop_constraint('commit_flags_uid_key', 'commit_flags')
    except:
        pass 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(None, 'users', type_='foreignkey')
    op.drop_constraint(None, 'tstresults', type_='foreignkey')
    op.add_column('tasks', sa.Column('taskdesc', sa.TEXT(length=252), nullable=True))
    op.drop_constraint(None, 'tasks', type_='foreignkey')
    op.drop_constraint(None, 'tasks', type_='foreignkey')
    op.drop_constraint(None, 'projects', type_='unique')
    op.drop_constraint(None, 'interfacetests', type_='foreignkey')
    op.drop_table('userloginlog')
    # ### end Alembic commands ### 

def downgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(None, 'objects', type_='foreignkey')
    op.drop_column('objects', 'in_reply_to_id')
    ### end Alembic commands ### 

def downgrade():
    """ Remove the composite unique constraints on UID + pull_request_uid
    in pull_request_flags and make it an unique constraint on UID .
    """
    op.drop_constraint(
        'pull_request_flags_uid_pull_request_uid_key',
        'pull_request_flags')
    op.create_unique_constraint(
            "pull_request_flags_uid_key",
            'pull_request_flags',
            ["uid"]
    ) 

def downgrade():
    op.drop_constraint(op.f('fk_users_domain_name_domains'), 'users', type_='foreignkey')
    op.drop_index(op.f('ix_users_domain_name'), table_name='users')
    op.drop_column('users', 'domain_name')
    op.drop_table('domains') 

def upgrade():
    """ Remove the unique constraints on UID in pull_request_flags and make
    it a composite unique constraint on UID + pull_request_uid.
    """
    # alter the constraints
    op.drop_constraint('pull_request_flags_uid_key', 'pull_request_flags')
    op.create_unique_constraint(
            "pull_request_flags_uid_pull_request_uid_key",
            'pull_request_flags',
            ["uid", "pull_request_uid"]
    ) 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(op.f('fk_keypairs_user_users'), 'keypairs', type_='foreignkey')
    op.drop_column('keypairs', 'user')
    op.drop_index(op.f('ix_users_email'), table_name='users')
    op.drop_table('users')
    # ### end Alembic commands ###

    userrole.drop(op.get_bind()) 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.add_column('kernels', sa.Column('agent_id', sa.VARCHAR(), autoincrement=False, nullable=True))
    op.drop_constraint(op.f('fk_kernels_agent_agents'), 'kernels', type_='foreignkey')
    op.drop_index(op.f('ix_kernels_terminated_at'), table_name='kernels')
    op.drop_index(op.f('ix_kernels_status'), table_name='kernels')
    op.drop_index(op.f('ix_kernels_created_at'), table_name='kernels')
    op.drop_column('kernels', 'status_info')
    op.drop_column('kernels', 'num_queries')
    op.drop_column('kernels', 'net_tx_bytes')
    op.drop_column('kernels', 'net_rx_bytes')
    op.drop_column('kernels', 'max_mem_bytes')
    op.drop_column('kernels', 'io_write_bytes')
    op.drop_column('kernels', 'io_read_bytes')
    op.drop_column('kernels', 'cur_mem_bytes')
    op.drop_column('kernels', 'cpu_used')
    op.drop_column('kernels', 'allocated_cores')
    op.drop_column('kernels', 'agent')
    op.create_table(
        'usage',
        sa.Column('id', postgresql.UUID(), server_default=sa.text('uuid_generate_v4()'), autoincrement=False, nullable=False),
        sa.Column('access_key_id', sa.VARCHAR(length=20), autoincrement=False, nullable=True),
        sa.Column('kernel_type', sa.VARCHAR(), autoincrement=False, nullable=True),
        sa.Column('kernel_id', sa.VARCHAR(), autoincrement=False, nullable=True),
        sa.Column('started_at', postgresql.TIMESTAMP(timezone=True), autoincrement=False, nullable=True),
        sa.Column('terminated_at', postgresql.TIMESTAMP(timezone=True), autoincrement=False, nullable=True),
        sa.Column('cpu_used', sa.INTEGER(), server_default=sa.text('0'), autoincrement=False, nullable=True),
        sa.Column('mem_used', sa.INTEGER(), server_default=sa.text('0'), autoincrement=False, nullable=True),
        sa.Column('io_used', sa.INTEGER(), server_default=sa.text('0'), autoincrement=False, nullable=True),
        sa.Column('net_used', sa.INTEGER(), server_default=sa.text('0'), autoincrement=False, nullable=True),
        sa.ForeignKeyConstraint(['access_key_id'], ['keypairs.access_key'], name='fk_usage_access_key_id_keypairs'),
        sa.PrimaryKeyConstraint('id', name='pk_usage')
    )
    op.drop_table('vfolder_attachment')
    op.drop_table('vfolders')
    op.drop_table('agents')
    # ### end Alembic commands ### 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(op.f('fk_keypairs_resource_policy_keypair_resource_policies'),
                       'keypairs', type_='foreignkey')
    op.add_column(
        'keypairs',
        sa.Column('concurrency_limit', sa.INTEGER(),
                  autoincrement=False, nullable=True))
    op.alter_column('keypairs', 'resource_policy',
                    existing_type=sa.String(length=256),
                    type_=sa.VARCHAR(),
                    nullable=True)
    op.drop_table('keypair_resource_policies')
    default_for_unspecified.drop(op.get_bind())
    # ### end Alembic commands ### 

def downgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_constraint(op.f('fk_kernels_domain_name_domains'), 'kernels', type_='foreignkey')
    op.drop_constraint(op.f('fk_kernels_user_uuid_users'), 'kernels', type_='foreignkey')
    op.drop_constraint(op.f('fk_kernels_group_id_groups'), 'kernels', type_='foreignkey')
    op.drop_column('kernels', 'user_uuid')
    op.drop_column('kernels', 'group_id')
    op.drop_column('kernels', 'domain_name')
    # ### end Alembic commands ### 

def downgrade():
    op.drop_constraint('fk_vfolder_attachment_vfolder_vfolders', 'vfolder_attachment', type_='foreignkey')
    op.drop_constraint('fk_vfolder_attachment_kernel_kernels', 'vfolder_attachment', type_='foreignkey')
    op.drop_constraint('pk_kernels', 'kernels', type_='primary')
    op.drop_index(op.f('ix_kernels_sess_id'), table_name='kernels')
    op.drop_index(op.f('ix_kernels_sess_id_role'), table_name='kernels')
    op.alter_column(
        'kernels', 'sess_id',
        existing_type=sa.String(length=64),
        type_=postgresql.UUID(),
        nullable=False,
        existing_server_default=sa.text('uuid_generate_v4()'),
        postgresql_using='sess_id::uuid')
    op.create_primary_key('pk_kernels', 'kernels', ['sess_id'])
    op.drop_column('kernels', 'id')
    op.drop_column('kernels', 'role')
    op.create_foreign_key('fk_vfolder_attachment_vfolder_vfolders',
                          'vfolder_attachment', 'vfolders',
                          ['vfolder'], ['id'])
    op.create_foreign_key('fk_vfolder_attachment_kernel_kernels',
                          'vfolder_attachment', 'kernels',
                          ['kernel'], ['sess_id'])