feat(db): add observers_txt column to t_base_visit

Add revision alembic

Reviewed-by: andriacap

backend/geonature/migrations/versions/8309591841f3_add_observers_txt_column_t_base_visit.py

@@ -0,0 +1,37 @@
+"""add_observers_txt_column_t_base_visit
+
+Revision ID: 8309591841f3
+Revises: f1dd984bff97
+Create Date: 2023-10-06 11:07:43.532623
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "8309591841f3"
+down_revision = "f1dd984bff97"
+branch_labels = None
+depends_on = None
+
+
+monitorings_schema = "gn_monitoring"
+table = "t_base_visits"
+column = "observers_txt"
+
+
+def upgrade():
+    op.add_column(
+        table,
+        sa.Column(
+            column,
+            sa.Text(),
+            nullable=True,
+        ),
+        schema=monitorings_schema,
+    )
+
+
+def downgrade():
+    op.drop_column(table, column, schema=monitorings_schema)