Merge pull request #189 from sanger/dpl146_increase_baracoda_current_…

…value

Dpl146 increase baracoda current value

.release-version

@@ -1 +1 @@
-2.7.0
+2.7.1

alembic/versions/bc442d63d7d3_move_forward_current_value_for_heron.py

@@ -0,0 +1,43 @@
+"""Move forward current value for heron
+
+Revision ID: bc442d63d7d3
+Revises: a32c725ae353
+Create Date: 2021-10-13 14:07:48.425000
+
+"""
+from alembic import op
+import os
+
+# revision identifiers, used by Alembic.
+revision = "bc442d63d7d3"
+down_revision = "a32c725ae353"
+branch_labels = None
+depends_on = None
+
+
+def __DANGER_restart_sequence_with(value):
+    if os.environ.get("CONFIRM_HERON_SEQUENCE_RESTART") is None:
+        description = (
+            "'This migration is potentially destructive. Update the value for RESTART WITH"
+            "to a known unused value and set the environment variable "
+            "CONFIRM_HERON_SEQUENCE_RESTART to confirm you want to apply this migration.'"
+        )
+        raise ValueError(description)
+    # Last value in database is 2564197, we want to move forward past this value
+    op.execute(f"ALTER SEQUENCE heron RESTART WITH { value };")
+
+
+def upgrade():
+    # Last value in database is 2564197, we want to move forward past this value
+    __DANGER_restart_sequence_with(2564300)
+
+
+def downgrade():
+    # Actual value in Baracoda is 2156143, but if we rollback we can leave a bit of space
+    # Please retrieve a sensible value and edit if you plan to downgrade
+    description = (
+        "\nPlease substitute this exception with a line in python like: \n"
+        "__DANGER_restart_sequence_with(<newvalue>)\n"
+        "where <newvalue> is a SAFE value you estimate.\n"
+    )
+    raise Exception(description)