set role_id for all admin users so no admin role data gets lost during migration

migrations/versions/5f462d2d9d25_convert_role_column_to_table.py

@@ -18,7 +18,7 @@ depends_on = None
 
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.create_table(
+    role_table = op.create_table(
         "role",
         sa.Column("id", sa.Integer(), nullable=False),
         sa.Column("name", sa.String(length=64), nullable=True),
@@ -26,9 +26,16 @@ def upgrade():
     )
     op.add_column("app_role", sa.Column("role_id", sa.Integer(), nullable=True))
     op.create_foreign_key(None, "app_role", "role", ["role_id"], ["id"])
-    op.drop_column("app_role", "role")
     # ### end Alembic commands ###
 
+    # Insert default role "admin" as ID 1
+    op.execute(sa.insert(role_table).values(id=1,name="admin"))
+    # Set role_id 1 to all current "admin" users
+    op.execute("UPDATE app_role SET role_id = 1 WHERE role = 'admin'")
+
+    # Drop old column
+    op.drop_column("app_role", "role")
+
 
 def downgrade():
     # ### commands auto generated by Alembic - please adjust! ###