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annotate libervia/backend/memory/migration/versions/79e5f3313fa4_create_table_for_pubsub_subscriptions.py @ 4212:5f2d496c633f

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core: get rid of `pickle`: Use of `pickle` to serialise data was a technical legacy that was causing trouble to store in database, to update (if a class was serialised, a change could break update), and to security (pickle can lead to code execution). This patch remove all use of Pickle in favour in JSON, notably: - for caching data, a Pydantic model is now used instead - for SQLAlchemy model, the LegacyPickle is replaced by JSON serialisation - in XEP-0373 a class `PublicKeyMetadata` was serialised. New method `from_dict` and `to_dict` method have been implemented to do serialisation. - new methods to (de)serialise data can now be specified with Identity data types. It is notably used to (de)serialise `path` of avatars. A migration script has been created to convert data (for upgrade or downgrade), with special care for XEP-0373 case. Depending of size of database, this migration script can be long to run. rel 443
author Goffi <goffi@goffi.org>
date Fri, 23 Feb 2024 13:31:04 +0100
parents 4b842c1fb686
children 0d7bb4df2343
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1 """create table for pubsub subscriptions
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2
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3 Revision ID: 79e5f3313fa4
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4 Revises: 129ac51807e4
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5 Create Date: 2022-03-14 17:15:00.689871
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6
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7 """
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8 from alembic import op
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9 import sqlalchemy as sa
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4b842c1fb686 refactoring: renamed `sat` package to `libervia.backend`
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10 from libervia.backend.memory.sqla_mapping import JID
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13 # revision identifiers, used by Alembic.
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14 revision = '79e5f3313fa4'
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15 down_revision = '129ac51807e4'
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16 branch_labels = None
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17 depends_on = None
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20 def upgrade():
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21 op.create_table('pubsub_subs',
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22 sa.Column('id', sa.Integer(), nullable=False),
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23 sa.Column('node_id', sa.Integer(), nullable=False),
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24 sa.Column('subscriber', JID(), nullable=True),
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25 sa.Column('state', sa.Enum('SUBSCRIBED', 'PENDING', name='state'), nullable=True),
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26 sa.ForeignKeyConstraint(['node_id'], ['pubsub_nodes.id'], name=op.f('fk_pubsub_subs_node_id_pubsub_nodes'), ondelete='CASCADE'),
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27 sa.PrimaryKeyConstraint('id', name=op.f('pk_pubsub_subs')),
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28 sa.UniqueConstraint('node_id', 'subscriber', name=op.f('uq_pubsub_subs_node_id'))
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29 )
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32 def downgrade():
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33 op.drop_table('pubsub_subs')