Mercurial > libervia-backend
comparison sat/memory/migration/versions/79e5f3313fa4_create_table_for_pubsub_subscriptions.py @ 3744:658ddbabaf36
core (memory/sqla): new table/mapping to handle Pubsub node subscriptions:
node subscriptions can now be cached, this can be useful for components which must keep
track of subscibers.
rel 364
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Tue, 22 Mar 2022 17:00:42 +0100 |
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| children |
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| 3743:54c249ec35ce | 3744:658ddbabaf36 |
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| 1 """create table for pubsub subscriptions | |
| 2 | |
| 3 Revision ID: 79e5f3313fa4 | |
| 4 Revises: 129ac51807e4 | |
| 5 Create Date: 2022-03-14 17:15:00.689871 | |
| 6 | |
| 7 """ | |
| 8 from alembic import op | |
| 9 import sqlalchemy as sa | |
| 10 from sat.memory.sqla_mapping import JID | |
| 11 | |
| 12 | |
| 13 # revision identifiers, used by Alembic. | |
| 14 revision = '79e5f3313fa4' | |
| 15 down_revision = '129ac51807e4' | |
| 16 branch_labels = None | |
| 17 depends_on = None | |
| 18 | |
| 19 | |
| 20 def upgrade(): | |
| 21 op.create_table('pubsub_subs', | |
| 22 sa.Column('id', sa.Integer(), nullable=False), | |
| 23 sa.Column('node_id', sa.Integer(), nullable=False), | |
| 24 sa.Column('subscriber', JID(), nullable=True), | |
| 25 sa.Column('state', sa.Enum('SUBSCRIBED', 'PENDING', name='state'), nullable=True), | |
| 26 sa.ForeignKeyConstraint(['node_id'], ['pubsub_nodes.id'], name=op.f('fk_pubsub_subs_node_id_pubsub_nodes'), ondelete='CASCADE'), | |
| 27 sa.PrimaryKeyConstraint('id', name=op.f('pk_pubsub_subs')), | |
| 28 sa.UniqueConstraint('node_id', 'subscriber', name=op.f('uq_pubsub_subs_node_id')) | |
| 29 ) | |
| 30 | |
| 31 | |
| 32 def downgrade(): | |
| 33 op.drop_table('pubsub_subs') |