Add the 'active' field to the 'tasks' table

alembic/versions/719f2d1539c8_add_active_field_to_tasks.py

@@ -0,0 +1,33 @@
+"""Add active field to tasks
+
+Revision ID: 719f2d1539c8
+Revises: ac2bd309d20c
+Create Date: 2020-05-20 13:01:33.239007
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '719f2d1539c8'
+down_revision = 'ac2bd309d20c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    with op.batch_alter_table('tasks') as tasks:
+        tasks.add_column(
+            sa.Column(
+                'active',
+                sa.Boolean,
+                server_default=sa.sql.expression.true(),
+                nullable=False
+            )
+        )
+
+
+def downgrade():
+    with op.batch_alter_table('tasks') as tasks:
+        tasks.drop_column('active')