Migrated links, lyrics and properties

scripts/02_migrate_properties.py

@@ -0,0 +1,48 @@
+import json
+from collections.abc import Iterable
+from typing import TypedDict
+
+from folkugat_web.dal.sql import get_connection
+from folkugat_web.dal.sql.temes import properties as properties_dal
+from folkugat_web.model.temes import Property, PropertyField
+
+query = """ SELECT id, properties FROM temes """
+PropertyRowTuple = tuple[int, str]
+
+
+class OldPropertyRowDict(TypedDict):
+    field: str
+    value: str
+
+
+def _build_property(tema_id: int, property_dict: OldPropertyRowDict) -> Property:
+    return Property(
+        id=None,
+        tema_id=tema_id,
+        field=PropertyField(property_dict["field"]),
+        value=property_dict["value"],
+    )
+
+
+def _build_properties(row: PropertyRowTuple) -> list[Property]:
+    tema_id = row[0]
+    property_dicts: list[OldPropertyRowDict] = json.loads(row[1])
+    return [_build_property(tema_id, property_dict) for property_dict in property_dicts]
+
+
+with get_connection() as con:
+    cur = con.cursor()
+    _ = cur.execute(query)
+    iter_rows: Iterable[PropertyRowTuple] = cur.fetchall()
+    rows = list(map(_build_properties, iter_rows))
+
+    _ = cur.execute("DELETE FROM tema_properties")
+    for properties in rows:
+        for property in properties:
+            _ = properties_dal.insert_property(property=property, con=con)
+
+    drop_query = """ ALTER TABLE temes DROP COLUMN properties"""
+    _ = cur.execute(drop_query)
+
+
+print("DONE!")