Mercurial > libervia-backend

view sat/memory/migration/versions/79e5f3313fa4_create_table_for_pubsub_subscriptions.py @ 3914:4cb38c8312a1

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plugin XEP-0384, xml_tools: avoid `getItems` timeout + fix empty node crash + parsing: - use `max_items` in `getItems` calls for bundles, as otherwise some pubsub service may return full nodes, which may be huge is `max_items=1` is not set on the node, possibly resulting in timeouts. - the plugin was crashing when TWOMEMO devices list node has no items at all. This is not the case anymore. - a naive parsing method has been implemented in `xml_tools` to replace the serialisation/deserialisation method. This should be more efficient and will avoid annoying `ns0:` prefixes in XML logs.
author Goffi <goffi@goffi.org>
date Sat, 24 Sep 2022 16:37:46 +0200
parents 658ddbabaf36
children
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"""create table for pubsub subscriptions

Revision ID: 79e5f3313fa4
Revises: 129ac51807e4
Create Date: 2022-03-14 17:15:00.689871

"""
from alembic import op
import sqlalchemy as sa
from sat.memory.sqla_mapping import JID


# revision identifiers, used by Alembic.
revision = '79e5f3313fa4'
down_revision = '129ac51807e4'
branch_labels = None
depends_on = None


def upgrade():
    op.create_table('pubsub_subs',
    sa.Column('id', sa.Integer(), nullable=False),
    sa.Column('node_id', sa.Integer(), nullable=False),
    sa.Column('subscriber', JID(), nullable=True),
    sa.Column('state', sa.Enum('SUBSCRIBED', 'PENDING', name='state'), nullable=True),
    sa.ForeignKeyConstraint(['node_id'], ['pubsub_nodes.id'], name=op.f('fk_pubsub_subs_node_id_pubsub_nodes'), ondelete='CASCADE'),
    sa.PrimaryKeyConstraint('id', name=op.f('pk_pubsub_subs')),
    sa.UniqueConstraint('node_id', 'subscriber', name=op.f('uq_pubsub_subs_node_id'))
    )


def downgrade():
    op.drop_table('pubsub_subs')