sql migration

migrations/versions/2020_062811_7128f87af701_.py

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+"""empty message
+
+Revision ID: 7128f87af701
+Revises: a3c9a43e41f4
+Create Date: 2020-06-28 11:18:22.765690
+
+"""
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '7128f87af701'
+down_revision = 'a3c9a43e41f4'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('mailbox', sa.Column('nb_failed_checks', sa.Integer(), server_default='0', nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('mailbox', 'nb_failed_checks')
+    # ### end Alembic commands ###