feat: add groups to export

lib/mv/membership/member_export/build.ex

@@ -132,12 +132,15 @@ defmodule Mv.Membership.MemberExport.Build do
         parsed.computed_fields != [] or
         "membership_fee_status" in parsed.member_fields
 
+    need_groups = "groups" in parsed.member_fields
+
     query =
       Member
       |> Ash.Query.new()
       |> Ash.Query.select(select_fields)
       |> load_custom_field_values_query(custom_field_ids_union)
       |> maybe_load_cycles(need_cycles, parsed.show_current_cycle)
+      |> maybe_load_groups(need_groups)
 
     query =
       if parsed.selected_ids != [] do
@@ -294,6 +297,13 @@ defmodule Mv.Membership.MemberExport.Build do
     MembershipFeeStatus.load_cycles_for_members(query, show_current)
   end
 
+  defp maybe_load_groups(query, false), do: query
+
+  defp maybe_load_groups(query, true) do
+    # Load groups with id and name only (for export formatting)
+    Ash.Query.load(query, groups: [:id, :name])
+  end
+
   defp apply_cycle_status_filter(members, nil, _show_current), do: members
 
   defp apply_cycle_status_filter(members, status, show_current) when status in [:paid, :unpaid] do
@@ -343,6 +353,19 @@ defmodule Mv.Membership.MemberExport.Build do
         }
       end)
 
+    groups_col =
+      if "groups" in parsed.member_fields do
+        [
+          %{
+            key: :groups,
+            kind: :groups,
+            label: label_fn.(:groups)
+          }
+        ]
+      else
+        []
+      end
+
     custom_cols =
       parsed.custom_field_ids
       |> Enum.map(fn id ->
@@ -361,7 +384,7 @@ defmodule Mv.Membership.MemberExport.Build do
       end)
       |> Enum.reject(&is_nil/1)
 
-    member_cols ++ computed_cols ++ custom_cols
+    member_cols ++ computed_cols ++ groups_col ++ custom_cols
   end
 
   defp build_rows(members, columns, custom_fields_by_id) do
@@ -391,6 +414,11 @@ defmodule Mv.Membership.MemberExport.Build do
     if is_binary(value), do: value, else: ""
   end
 
+  defp cell_value(member, %{kind: :groups, key: :groups}, _custom_fields_by_id) do
+    groups = Map.get(member, :groups) || []
+    format_groups(groups)
+  end
+
   defp key_to_atom(k) when is_atom(k), do: k
 
   defp key_to_atom(k) when is_binary(k) do
@@ -424,6 +452,15 @@ defmodule Mv.Membership.MemberExport.Build do
   defp format_member_value(%NaiveDateTime{} = dt), do: NaiveDateTime.to_iso8601(dt)
   defp format_member_value(value), do: to_string(value)
 
+  defp format_groups([]), do: ""
+
+  defp format_groups(groups) when is_list(groups) do
+    groups
+    |> Enum.map(fn group -> Map.get(group, :name) || "" end)
+    |> Enum.reject(&(&1 == ""))
+    |> Enum.join(", ")
+  end
+
   defp build_meta(members) do
     %{
       generated_at: DateTime.utc_now() |> DateTime.to_iso8601(),