Add migration for LOA array type

alembic/versions/db161adbafdf_update_loa_to_array_type.py

@@ -0,0 +1,28 @@
+"""Update LOA to Array Type
+
+Revision ID: db161adbafdf
+Revises: b3a1a07cf30b
+Create Date: 2019-02-15 14:28:33.181136
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'db161adbafdf'
+down_revision = 'b3a1a07cf30b'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.execute("ALTER TABLE task_orders ALTER COLUMN loa TYPE varchar[] USING array[loa]")
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.execute("ALTER TABLE task_orders ALTER COLUMN loa TYPE varchar USING loa[1]")
+    # ### end Alembic commands ###