chore(api) : Add communes migration

A first migration to reflect the new fields (centre, codes postaux)
added on the communes, and remove the now useless fields and indices.

We'll need a second cleanup migration later on (after the next
deployment) to add a spatial index and make the codes_postaux non
nullable.

api/src/alembic/versions/20240830_175854_e3f3dfa4ad01_modified_api__communes.py

@@ -0,0 +1,75 @@
+"""Modified api__communes
+
+Revision ID: e3f3dfa4ad01
+Revises: 517603187775
+Create Date: 2024-08-30 17:58:54.747630
+
+"""
+
+import geoalchemy2
+import sqlalchemy as sa
+from alembic import op
+
+from data_inclusion.api.core.db import SortedTextArray
+
+# revision identifiers, used by Alembic.
+revision = "e3f3dfa4ad01"
+down_revision = "517603187775"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "api__communes",
+        sa.Column(
+            "codes_postaux",
+            SortedTextArray(sa.Text()),
+            nullable=True,
+        ),
+    )
+    op.add_column(
+        "api__communes",
+        sa.Column(
+            "centre",
+            geoalchemy2.types.Geometry(
+                srid=4326, from_text="ST_GeomFromEWKT", name="geometry"
+            ),
+            nullable=True,
+        ),
+    )
+    op.drop_index("ix_api__communes__geography", table_name="api__communes")
+    op.drop_column("api__communes", "geom")
+
+
+def downgrade() -> None:
+    op.add_column(
+        "api__communes",
+        sa.Column(
+            "geom",
+            geoalchemy2.types.Geometry(
+                srid=4326,
+                spatial_index=False,
+                from_text="ST_GeomFromEWKT",
+                name="geometry",
+                _spatial_index_reflected=True,
+            ),
+            autoincrement=False,
+            nullable=True,
+        ),
+    )
+    op.drop_index(
+        "idx_api__communes_centre", table_name="api__communes", postgresql_using="gist"
+    )
+    op.create_index(
+        "ix_api__communes__geography",
+        "api__communes",
+        [
+            sa.text(
+                "(st_simplify(geom, 0.01::double precision)::geography(Geometry,4326))"
+            )
+        ],
+        unique=False,
+    )
+    op.drop_column("api__communes", "centre")
+    op.drop_column("api__communes", "codes_postaux")

api/src/data_inclusion/api/inclusion_data/models.py

@@ -16,10 +16,12 @@ class Commune(Base):
     departement: Mapped[str]
     region: Mapped[str]
     siren_epci: Mapped[str]
-    centre = mapped_column(
-        geoalchemy2.Geometry("Geometry", srid=4326, spatial_index=True)
-    )
-    codes_postaux: Mapped[list[str]]
+    # FIXME(vperron) : This column should have an index (spatial_index=True)
+    # but let's do it in a future migration
+    centre = mapped_column(geoalchemy2.Geometry("Geometry", srid=4326))
+    # FIXME(vperron) : This should not be nullable but at the time of migration
+    # it's necessary as the info is not there yet. Let's clean up later.
+    codes_postaux: Mapped[list[str] | None]
 
     def __repr__(self) -> str:
         return f"<Commune(code={self.code}, nom={self.nom})>"