Introduced air quality and weather, onboarding for mobile devices with qr code and otp. Cascade on delete of device with telemtry.

db_migrations/alembic/versions/20251113_2208_0f2632e459d3_add_device_onboarding_tokens_for_secure_.py

@@ -0,0 +1,45 @@
+"""Add device onboarding tokens for secure QR code onboarding
+
+Revision ID: 0f2632e459d3
+Revises: 4e405f1129b1
+Create Date: 2025-11-13 22:08:31.765427+00:00
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '0f2632e459d3'
+down_revision: Union[str, Sequence[str], None] = '4e405f1129b1'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('device_onboarding_tokens',
+    sa.Column('token', sa.Text(), nullable=False),
+    sa.Column('device_id', sa.Text(), nullable=False),
+    sa.Column('certificate_id', sa.Text(), nullable=False),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('expires_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('used_at', sa.DateTime(timezone=True), nullable=True),
+    sa.ForeignKeyConstraint(['device_id'], ['devices.id'], ondelete='CASCADE'),
+    sa.PrimaryKeyConstraint('token')
+    )
+    op.create_index('idx_onboarding_tokens_device_id', 'device_onboarding_tokens', ['device_id'], unique=False)
+    op.create_index('idx_onboarding_tokens_expires', 'device_onboarding_tokens', ['expires_at'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index('idx_onboarding_tokens_expires', table_name='device_onboarding_tokens')
+    op.drop_index('idx_onboarding_tokens_device_id', table_name='device_onboarding_tokens')
+    op.drop_table('device_onboarding_tokens')
+    # ### end Alembic commands ###

db_migrations/alembic/versions/20251113_2318_4b84a36e13f5_add_cascade_delete_to_telemetry.py

@@ -0,0 +1,48 @@
+"""add_cascade_delete_to_telemetry
+
+Revision ID: 4b84a36e13f5
+Revises: 0f2632e459d3
+Create Date: 2025-11-13 23:18:36.029045+00:00
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision: str = '4b84a36e13f5'
+down_revision: Union[str, Sequence[str], None] = '0f2632e459d3'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema: Add ON DELETE CASCADE to telemetry foreign key."""
+    # Drop existing foreign key constraint
+    op.drop_constraint('telemetry_device_id_fkey', 'telemetry', type_='foreignkey')
+    
+    # Re-create foreign key with ON DELETE CASCADE
+    op.create_foreign_key(
+        'telemetry_device_id_fkey',
+        'telemetry',
+        'devices',
+        ['device_id'],
+        ['id'],
+        ondelete='CASCADE'
+    )
+
+
+def downgrade() -> None:
+    """Downgrade schema: Remove CASCADE from telemetry foreign key."""
+    # Drop foreign key with CASCADE
+    op.drop_constraint('telemetry_device_id_fkey', 'telemetry', type_='foreignkey')
+    
+    # Re-create foreign key without CASCADE (original state)
+    op.create_foreign_key(
+        'telemetry_device_id_fkey',
+        'telemetry',
+        'devices',
+        ['device_id'],
+        ['id']
+    )

db_migrations/models.py

@@ -78,7 +78,30 @@ class DeviceCredential(Base):
         return f"<DeviceCredential(id={self.id}, device_id={self.device_id}, type={self.credential_type})>"
 
 
-class Telemetry(Base):
+class DeviceOnboardingToken(Base):
+    """One-time tokens for secure device onboarding via QR code."""
+
+    __tablename__ = "device_onboarding_tokens"
+
+    token = Column(Text, primary_key=True)
+    device_id = Column(
+        Text, ForeignKey("devices.id", ondelete="CASCADE"), nullable=False
+    )
+    certificate_id = Column(Text, nullable=False)
+    created_at = Column(DateTime(timezone=True), nullable=False)
+    expires_at = Column(DateTime(timezone=True), nullable=False)
+    used_at = Column(DateTime(timezone=True))
+
+    __table_args__ = (
+        Index("idx_onboarding_tokens_device_id", "device_id"),
+        Index("idx_onboarding_tokens_expires", "expires_at"),
+    )
+
+    def __repr__(self):
+        return f"<DeviceOnboardingToken(device_id={self.device_id}, used={self.used_at is not None})>"
+
+
+class   Telemetry(Base):
     """
     Time-series telemetry data from devices.
     """