feat(export): include Fee Type in CSV export

Payload and column_order when visible; allowlist, load, sort;
MembersCSV cell for :membership_fee_type.

lib/mv/membership/members_csv.ex

@@ -59,6 +59,13 @@ defmodule Mv.Membership.MembersCSV do
     if is_binary(value), do: value, else: ""
   end
 
+  defp cell_value(member, %{kind: :membership_fee_type, key: :membership_fee_type}) do
+    case Map.get(member, :membership_fee_type) do
+      %{name: name} when is_binary(name) -> name
+      _ -> ""
+    end
+  end
+
   defp cell_value(member, %{kind: :groups, key: :groups}) do
     groups = Map.get(member, :groups) || []
     format_groups(groups)

lib/mv_web/controllers/member_export_controller.ex

@@ -19,7 +19,7 @@ defmodule MvWeb.MemberExportController do
   use Gettext, backend: MvWeb.Gettext
 
   @member_fields_allowlist (Mv.Constants.member_fields() |> Enum.map(&Atom.to_string/1)) ++
-                             ["groups"]
+                             ["membership_fee_type", "groups"]
   @computed_export_fields ["membership_fee_status"]
   @custom_field_prefix Mv.Constants.custom_field_prefix()
 
@@ -238,6 +238,7 @@ defmodule MvWeb.MemberExportController do
       parsed.computed_fields != [] and "membership_fee_status" in parsed.computed_fields
 
     need_groups = "groups" in parsed.member_fields
+    need_membership_fee_type = "membership_fee_type" in parsed.member_fields
 
     query =
       Member
@@ -246,6 +247,7 @@ defmodule MvWeb.MemberExportController do
       |> load_custom_field_values_query(parsed.custom_field_ids)
       |> maybe_load_cycles(need_cycles, parsed.show_current_cycle)
       |> maybe_load_groups(need_groups)
+      |> maybe_load_membership_fee_type(need_membership_fee_type)
 
     query =
       if parsed.selected_ids != [] do
@@ -296,6 +298,12 @@ defmodule MvWeb.MemberExportController do
     Ash.Query.load(query, groups: [:id, :name])
   end
 
+  defp maybe_load_membership_fee_type(query, false), do: query
+
+  defp maybe_load_membership_fee_type(query, true) do
+    Ash.Query.load(query, membership_fee_type: [:id, :name])
+  end
+
   # Adds computed field values to members (e.g. membership_fee_status)
   defp add_computed_fields(members, computed_fields, show_current_cycle) do
     if "membership_fee_status" in computed_fields do
@@ -343,26 +351,45 @@ defmodule MvWeb.MemberExportController do
   defp maybe_sort_export(query, field, order) when is_binary(field) do
     cond do
       field == "groups" ->
-        # Groups sort → in-memory nach dem Read (wie Tabelle)
         {query, true}
 
+      field == "membership_fee_type" ->
+        apply_membership_fee_type_sort_export(query, order)
+
       custom_field_sort?(field) ->
-        # Custom field sort → in-memory nach dem Read (wie Tabelle)
         {query, true}
 
       true ->
-        field_atom = String.to_existing_atom(field)
-
-        if field_atom in (Mv.Constants.member_fields() -- [:notes]) do
-          {Ash.Query.sort(query, [{field_atom, String.to_existing_atom(order)}]), false}
-        else
-          {query, false}
-        end
+        apply_member_field_sort_export(query, field, order)
     end
   rescue
     ArgumentError -> {query, false}
   end
 
+  defp apply_membership_fee_type_sort_export(query, order) do
+    order_atom = if order == "desc", do: :desc, else: :asc
+    {Ash.Query.sort(query, membership_fee_type_id: order_atom), false}
+  end
+
+  defp apply_member_field_sort_export(query, field, order) do
+    field_atom = String.to_existing_atom(field)
+
+    sortable =
+      field_atom in (Mv.Constants.member_fields() -- [:notes]) or
+        field_atom == :membership_fee_type
+
+    if sortable do
+      order_atom = if order == "desc", do: :desc, else: :asc
+
+      sort_field =
+        if field_atom == :membership_fee_type, do: :membership_fee_type_id, else: field_atom
+
+      {Ash.Query.sort(query, [{sort_field, order_atom}]), false}
+    else
+      {query, false}
+    end
+  end
+
   defp custom_field_sort?(field), do: String.starts_with?(field, @custom_field_prefix)
 
   # ------------------------------------------------------------------
@@ -488,6 +515,19 @@ defmodule MvWeb.MemberExportController do
         }
       end)
 
+    membership_fee_type_col =
+      if "membership_fee_type" in parsed.member_fields do
+        [
+          %{
+            header: membership_fee_type_field_header(conn),
+            kind: :membership_fee_type,
+            key: :membership_fee_type
+          }
+        ]
+      else
+        []
+      end
+
     groups_col =
       if "groups" in parsed.member_fields do
         [
@@ -519,7 +559,8 @@ defmodule MvWeb.MemberExportController do
       end)
       |> Enum.reject(&is_nil/1)
 
-    member_cols ++ computed_cols ++ groups_col ++ custom_cols
+    # Table order: ... membership_fee_start_date, membership_fee_type, membership_fee_status, groups, custom
+    member_cols ++ membership_fee_type_col ++ computed_cols ++ groups_col ++ custom_cols
   end
 
   # --- headers: use MemberFields.label for translations ---
@@ -559,6 +600,10 @@ defmodule MvWeb.MemberExportController do
     cf.name
   end
 
+  defp membership_fee_type_field_header(_conn) do
+    MemberFields.label(:membership_fee_type)
+  end
+
   defp groups_field_header(_conn) do
     MemberFields.label(:groups)
   end