support prod ip db import

lib/towerops_web/controllers/api/v1/geoip_controller.ex

@@ -88,10 +88,13 @@ defmodule ToweropsWeb.Api.V1.GeoipController do
   end
 
   defp import_batch("locations", data, truncate) do
+    alias Towerops.GeoIP.Block
     alias Towerops.GeoIP.Location
     alias Towerops.Repo
 
     if truncate do
+      # Must delete blocks first due to foreign key constraint
+      Repo.delete_all(Block)
       Repo.delete_all(Location)
     end