lib/mv/membership/member_export.ex

@@ -16,7 +16,7 @@ defmodule Mv.Membership.MemberExport do
   alias MvWeb.MemberLive.Index.MembershipFeeStatus
 
   @member_fields_allowlist (Mv.Constants.member_fields() |> Enum.map(&Atom.to_string/1)) ++
-                             ["membership_fee_status", "groups"]
+                             ["membership_fee_type", "membership_fee_status", "groups"]
   @computed_export_fields ["membership_fee_status"]
   @computed_insert_after "membership_fee_start_date"
   @custom_field_prefix Mv.Constants.custom_field_prefix()
@@ -326,10 +326,10 @@ defmodule Mv.Membership.MemberExport do
     # Separate groups from other fields (groups is handled as a special field, not a member field)
     groups_field = if "groups" in member_fields, do: ["groups"], else: []
 
-    # final member_fields list (used for column specs order): table order + computed inserted + groups
+    # final member_fields list (used for column specs order): table order + fee type + computed + groups
     ordered_member_fields =
       selectable_member_fields
-      |> insert_computed_fields_like_table(computed_fields)
+      |> insert_fee_type_and_computed_fields_like_table(computed_fields, member_fields)
       |> then(fn fields -> fields ++ groups_field end)
 
     %{
@@ -420,27 +420,52 @@ defmodule Mv.Membership.MemberExport do
     table_order |> Enum.filter(&(&1 in fields))
   end
 
-  defp insert_computed_fields_like_table(db_fields_ordered, computed_fields) do
+  defp insert_fee_type_and_computed_fields_like_table(
-    # Insert membership_fee_status right after membership_fee_start_date (if both selected),
+         db_fields_ordered,
-    # otherwise append at the end of DB fields.
+         computed_fields,
+         member_fields
+       ) do
     computed_fields = computed_fields || []
+    member_fields = member_fields || []
 
     db_with_insert =
       Enum.flat_map(db_fields_ordered, fn f ->
-        if f == @computed_insert_after and "membership_fee_status" in computed_fields do
+        expand_field_with_computed(f, member_fields, computed_fields)
-          [f, "membership_fee_status"]
-        else
-          [f]
-        end
       end)
 
-    remaining =
+    # If fee type is visible but start_date was not in the list, it won't be in db_with_insert
-      computed_fields
+    db_with_insert =
-      |> Enum.reject(&(&1 in db_with_insert))
+      if "membership_fee_type" in member_fields and "membership_fee_type" not in db_with_insert do
+        db_with_insert ++ ["membership_fee_type"]
+      else
+        db_with_insert
+      end
 
+    remaining = Enum.reject(computed_fields, &(&1 in db_with_insert))
     db_with_insert ++ remaining
   end
 
+  # Insert membership_fee_type and membership_fee_status after membership_fee_start_date (table order).
+  defp expand_field_with_computed(f, member_fields, computed_fields) do
+    if f == @computed_insert_after do
+      extra = []
+
+      extra =
+        if "membership_fee_type" in member_fields,
+          do: extra ++ ["membership_fee_type"],
+          else: extra
+
+      extra =
+        if "membership_fee_status" in computed_fields,
+          do: extra ++ ["membership_fee_status"],
+          else: extra
+
+      [f] ++ extra
+    else
+      [f]
+    end
+  end
+
   defp normalize_computed_fields(fields) when is_list(fields) do
     fields
     |> Enum.filter(&is_binary/1)

lib/mv/membership/member_export/build.ex

@@ -134,6 +134,10 @@ defmodule Mv.Membership.MemberExport.Build do
 
     need_groups = "groups" in parsed.member_fields
 
+    need_membership_fee_type =
+      "membership_fee_type" in parsed.member_fields or
+        parsed.sort_field == "membership_fee_type"
+
     query =
       Member
       |> Ash.Query.new()
@@ -141,6 +145,7 @@ defmodule Mv.Membership.MemberExport.Build do
       |> load_custom_field_values_query(custom_field_ids_union)
       |> 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
@@ -196,8 +201,10 @@ defmodule Mv.Membership.MemberExport.Build do
   defp sort_members_in_memory(members, field, order) when is_binary(field) do
     field_atom = String.to_existing_atom(field)
 
-    if field_atom in Mv.Constants.member_fields() do
+    if field_atom in Mv.Constants.member_fields() or field_atom == :membership_fee_type do
-      sort_by_field(members, field_atom, order)
+      key_fn = sort_key_fn_for_field(field_atom)
+      compare_fn = build_compare_fn(order)
+      Enum.sort_by(members, key_fn, compare_fn)
     else
       members
     end
@@ -207,13 +214,17 @@ defmodule Mv.Membership.MemberExport.Build do
 
   defp sort_members_in_memory(members, _field, _order), do: members
 
-  defp sort_by_field(members, field_atom, order) do
+  defp sort_key_fn_for_field(:membership_fee_type) do
-    key_fn = fn member -> Map.get(member, field_atom) end
+    fn member ->
-    compare_fn = build_compare_fn(order)
+      case Map.get(member, :membership_fee_type) do
-
+        nil -> nil
-    Enum.sort_by(members, key_fn, compare_fn)
+        rel -> Map.get(rel, :name)
+      end
+    end
   end
 
+  defp sort_key_fn_for_field(field_atom), do: fn member -> Map.get(member, field_atom) end
+
   defp build_compare_fn("asc"), do: fn a, b -> a <= b end
   defp build_compare_fn("desc"), do: fn a, b -> b <= a end
   defp build_compare_fn(_), do: fn _a, _b -> true end
@@ -245,26 +256,41 @@ defmodule Mv.Membership.MemberExport.Build do
 
   defp maybe_sort(query, field, order) when is_binary(field) do
     cond do
-      field == "groups" ->
+      field == "groups" -> {query, true}
-        # Groups sort → in-memory nach dem Read (wie Tabelle)
+      field == "membership_fee_type" -> apply_fee_type_sort(query, order)
-        {query, true}
+      custom_field_sort?(field) -> {query, true}
-
+      true -> apply_standard_member_sort(query, field, order)
-      custom_field_sort?(field) ->
-        {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
     end
   rescue
     ArgumentError -> {query, false}
   end
 
+  defp apply_fee_type_sort(query, order) do
+    order_atom = if order == "desc", do: :desc, else: :asc
+    {Ash.Query.sort(query, [{"membership_fee_type.name", order_atom}]), false}
+  end
+
+  defp apply_standard_member_sort(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.name", order_atom},
+          else: {field_atom, order_atom}
+
+      {Ash.Query.sort(query, [sort_field]), false}
+    else
+      {query, false}
+    end
+  end
+
   defp sort_members_by_custom_field(members, _field, _order, _custom_fields) when members == [],
     do: []
 
@@ -344,6 +370,12 @@ defmodule Mv.Membership.MemberExport.Build 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
+
   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
@@ -393,6 +425,19 @@ defmodule Mv.Membership.MemberExport.Build do
         }
       end)
 
+    membership_fee_type_col =
+      if "membership_fee_type" in parsed.member_fields do
+        [
+          %{
+            key: :membership_fee_type,
+            kind: :membership_fee_type,
+            label: label_fn.(:membership_fee_type)
+          }
+        ]
+      else
+        []
+      end
+
     groups_col =
       if "groups" in parsed.member_fields do
         [
@@ -424,7 +469,8 @@ defmodule Mv.Membership.MemberExport.Build 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
 
   defp build_rows(members, columns, custom_fields_by_id) do
@@ -454,6 +500,17 @@ defmodule Mv.Membership.MemberExport.Build do
     if is_binary(value), do: value, else: ""
   end
 
+  defp cell_value(
+         member,
+         %{kind: :membership_fee_type, key: :membership_fee_type},
+         _custom_fields_by_id
+       ) 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}, _custom_fields_by_id) do
     groups = Map.get(member, :groups) || []
     format_groups(groups)

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()
 
@@ -239,6 +239,10 @@ defmodule MvWeb.MemberExportController do
 
     need_groups = "groups" in parsed.member_fields
 
+    need_membership_fee_type =
+      "membership_fee_type" in parsed.member_fields or
+        parsed.sort_field == "membership_fee_type"
+
     query =
       Member
       |> Ash.Query.new()
@@ -246,6 +250,7 @@ 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 +301,12 @@ 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 +354,45 @@ 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)
+        apply_member_field_sort_export(query, field, order)
-
-        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
     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.name", 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 +518,19 @@ 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 +562,8 @@ 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 +603,10 @@ 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

lib/mv_web/controllers/member_pdf_export_controller.ex

@@ -20,7 +20,8 @@ defmodule MvWeb.MemberPdfExportController do
   @invalid_json_message "invalid JSON"
   @export_failed_message "Failed to generate PDF export"
 
-  @allowed_member_field_strings Mv.Constants.member_fields() |> Enum.map(&Atom.to_string/1)
+  @allowed_member_field_strings (Mv.Constants.member_fields() |> Enum.map(&Atom.to_string/1)) ++
+                                  ["membership_fee_type", "groups"]
 
   def export(conn, %{"payload" => payload}) when is_binary(payload) do
     actor = current_actor(conn)

lib/mv_web/live/member_live/index.ex

@@ -615,7 +615,9 @@ defmodule MvWeb.MemberLive.Index do
   # -----------------------------------------------------------------
 
   @impl true
-  def handle_params(params, _url, socket) do
+  def handle_params(params, url, socket) do
+    url = url || request_url_from_socket(socket)
+    params = merge_fields_param_from_uri(params, url)
     prev_sig = build_signature(socket)
 
     fields_in_url? =
@@ -625,20 +627,7 @@ defmodule MvWeb.MemberLive.Index do
       end
 
     url_selection = FieldSelection.parse_from_url(params)
-
+    final_selection = compute_final_field_selection(fields_in_url?, url_selection, socket)
-    merged_selection =
-      FieldSelection.merge_sources(
-        url_selection,
-        socket.assigns.user_field_selection,
-        %{}
-      )
-
-    final_selection =
-      FieldVisibility.merge_with_global_settings(
-        merged_selection,
-        socket.assigns.settings,
-        socket.assigns.all_custom_fields
-      )
 
     visible_member_fields =
       final_selection
@@ -828,6 +817,70 @@ defmodule MvWeb.MemberLive.Index do
     add_boolean_filters(base_params, boolean_filters)
   end
 
+  defp compute_final_field_selection(true, url_selection, socket) do
+    only_url =
+      FieldVisibility.selection_from_url_only(url_selection, socket.assigns.all_custom_fields)
+
+    visible_members = FieldVisibility.get_visible_member_fields(only_url)
+    visible_custom = FieldVisibility.get_visible_custom_fields(only_url)
+
+    if visible_members == [] and visible_custom == [] do
+      # URL had only invalid field names; fall back to session + global.
+      compute_final_field_selection(false, url_selection, socket)
+    else
+      only_url
+    end
+  end
+
+  defp compute_final_field_selection(false, url_selection, socket) do
+    merged =
+      FieldSelection.merge_sources(
+        url_selection,
+        socket.assigns.user_field_selection,
+        %{}
+      )
+
+    FieldVisibility.merge_with_global_settings(
+      merged,
+      socket.assigns.settings,
+      socket.assigns.all_custom_fields
+    )
+  end
+
+  # On full page load conn.params has no query string; read "fields" from URI so column visibility is restored.
+  defp request_url_from_socket(socket) do
+    case socket.private[:connect_info] do
+      %Plug.Conn{} = conn -> Plug.Conn.request_url(conn)
+      _ -> nil
+    end
+  end
+
+  defp merge_fields_param_from_uri(params, nil), do: params
+
+  defp merge_fields_param_from_uri(params, %URI{query: query}) when is_binary(query) do
+    case URI.decode_query(query)["fields"] do
+      nil -> params
+      value -> Map.put(params, "fields", value)
+    end
+  end
+
+  defp merge_fields_param_from_uri(params, %URI{}), do: params
+
+  defp merge_fields_param_from_uri(params, url) when is_binary(url) do
+    case URI.parse(url).query do
+      nil ->
+        params
+
+      q ->
+        case URI.decode_query(q)["fields"] do
+          nil -> params
+          value -> Map.put(params, "fields", value)
+        end
+    end
+  end
+
+  defp merge_fields_param_from_uri(params, _), do: params
+
   defp build_base_params(query, sort_field, sort_order) do
     %{
       "query" => query || "",
@@ -913,6 +966,15 @@ defmodule MvWeb.MemberLive.Index do
     query =
       Ash.Query.load(query, groups: [:id, :name, :slug])
 
+    # Load membership_fee_type when the column is visible or when sorting by it
+    query =
+      if :membership_fee_type in socket.assigns.member_fields_visible or
+           socket.assigns.sort_field in [:membership_fee_type, "membership_fee_type"] do
+        Ash.Query.load(query, membership_fee_type: [:id, :name])
+      else
+        query
+      end
+
     query = apply_search_filter(query, search_query)
 
     query = apply_group_filters(query, socket.assigns[:group_filters], socket.assigns[:groups])
@@ -1073,6 +1135,10 @@ defmodule MvWeb.MemberLive.Index do
       field in [:groups, "groups"] ->
         {query, true}
 
+      # Membership fee type sort -> by related name at DB
+      field in [:membership_fee_type, "membership_fee_type"] ->
+        {Ash.Query.sort(query, [{"membership_fee_type.name", order}]), false}
+
       # Custom field sort -> after load
       custom_field_sort?(field) ->
         {query, true}
@@ -1118,11 +1184,16 @@ defmodule MvWeb.MemberLive.Index do
   defp valid_sort_field_db_or_custom?(field) when is_atom(field) do
     non_sortable_fields = [:notes]
     valid_fields = Mv.Constants.member_fields() -- non_sortable_fields
-    field in valid_fields or custom_field_sort?(field) or field == :groups
+    field in valid_fields or custom_field_sort?(field) or field in [:groups, :membership_fee_type]
   end
 
   defp valid_sort_field_db_or_custom?(field) when is_binary(field) do
-    normalized = if field == "groups", do: :groups, else: safe_member_field_atom_only(field)
+    normalized =
+      cond do
+        field == "groups" -> :groups
+        field == "membership_fee_type" -> :membership_fee_type
+        true -> safe_member_field_atom_only(field)
+      end
 
     (normalized != nil and valid_sort_field_db_or_custom?(normalized)) or
       custom_field_sort?(field)
@@ -1647,13 +1718,11 @@ defmodule MvWeb.MemberLive.Index do
       FieldVisibility.computed_member_fields()
       |> Enum.filter(&(&1 in member_fields_computed))
 
-    # Include groups in export only if it's visible in the table
     member_fields_with_groups =
-      if :groups in socket.assigns[:member_fields_visible] do
+      build_export_member_fields_list(
-        ordered_member_fields_db ++ ["groups"]
+        ordered_member_fields_db,
-      else
+        socket.assigns[:member_fields_visible]
-        ordered_member_fields_db
+      )
-      end
 
     # Order custom fields like the table (same as dynamic_cols / all_custom_fields order)
     ordered_custom_field_ids =
@@ -1674,7 +1743,9 @@ defmodule MvWeb.MemberLive.Index do
         export_column_order(
           ordered_member_fields_db,
           ordered_computed_fields,
-          ordered_custom_field_ids
+          ordered_custom_field_ids,
+          :membership_fee_type in socket.assigns[:member_fields_visible],
+          :groups in socket.assigns[:member_fields_visible]
         ),
       query: socket.assigns[:query] || nil,
       sort_field: export_sort_field(socket.assigns[:sort_field]),
@@ -1685,6 +1756,41 @@ defmodule MvWeb.MemberLive.Index do
     }
   end
 
+  defp expand_db_string_for_export(f, membership_fee_type_visible, computed_strings) do
+    if f == "membership_fee_start_date" do
+      extra =
+        if(membership_fee_type_visible, do: ["membership_fee_type"], else: []) ++
+          if "membership_fee_status" in computed_strings, do: ["membership_fee_status"], else: []
+
+      [f] ++ extra
+    else
+      [f]
+    end
+  end
+
+  defp build_export_member_fields_list(ordered_db, member_fields_visible) do
+    with_extras =
+      Enum.flat_map(ordered_db, fn f ->
+        if f == :membership_fee_start_date and
+             :membership_fee_type in (member_fields_visible || []) do
+          [f, :membership_fee_type]
+        else
+          [f]
+        end
+      end)
+
+    # If fee type is visible but start_date was not in the list, append it
+    with_extras =
+      if :membership_fee_type in (member_fields_visible || []) and
+           :membership_fee_type not in with_extras do
+        with_extras ++ [:membership_fee_type]
+      else
+        with_extras
+      end
+
+    if :groups in (member_fields_visible || []), do: with_extras ++ [:groups], else: with_extras
+  end
+
   defp export_cycle_status_filter(nil), do: nil
   defp export_cycle_status_filter(:paid), do: "paid"
   defp export_cycle_status_filter(:unpaid), do: "unpaid"
@@ -1700,31 +1806,41 @@ defmodule MvWeb.MemberLive.Index do
   defp export_sort_order(o) when is_binary(o), do: o
   # Build a single ordered list that matches the table order:
   # - DB fields in Mv.Constants.member_fields() order (already pre-filtered as ordered_member_fields_db)
-  # - computed fields inserted at the correct position (membership_fee_status after membership_fee_start_date)
+  # - membership_fee_type and membership_fee_status inserted after membership_fee_start_date when visible
+  # - groups appended before custom fields when visible
   # - custom fields appended in the same order as table (already ordered_custom_field_ids)
   defp export_column_order(
          ordered_member_fields_db,
          ordered_computed_fields,
-         ordered_custom_field_ids
+         ordered_custom_field_ids,
+         membership_fee_type_visible,
+         groups_visible
        ) do
     db_strings = Enum.map(ordered_member_fields_db, &Atom.to_string/1)
     computed_strings = Enum.map(ordered_computed_fields, &Atom.to_string/1)
 
-    # Place membership_fee_status right after membership_fee_start_date if present in export
+    # Place membership_fee_type and membership_fee_status after membership_fee_start_date when present
-    db_with_computed =
+    db_with_extras =
-      Enum.flat_map(db_strings, fn f ->
+      Enum.flat_map(
-        if f == "membership_fee_start_date" and "membership_fee_status" in computed_strings do
+        db_strings,
-          [f, "membership_fee_status"]
+        &expand_db_string_for_export(&1, membership_fee_type_visible, computed_strings)
-        else
+      )
-          [f]
+
-        end
+    # If fee type is visible but start_date was not in the list, append it before computed/groups
-      end)
+    db_with_extras =
+      if membership_fee_type_visible and "membership_fee_type" not in db_with_extras do
+        db_with_extras ++ ["membership_fee_type"]
+      else
+        db_with_extras
+      end
 
     # Any remaining computed fields not inserted above (future-proof)
     remaining_computed =
       computed_strings
-      |> Enum.reject(&(&1 in db_with_computed))
+      |> Enum.reject(&(&1 in db_with_extras))
 
-    db_with_computed ++ remaining_computed ++ ordered_custom_field_ids
+    result = db_with_extras ++ remaining_computed
+    result = if groups_visible, do: result ++ ["groups"], else: result
+    result ++ ordered_custom_field_ids
   end
 end

lib/mv_web/live/member_live/index.html.heex

@@ -331,6 +331,28 @@
     >
       {MvWeb.MemberLive.Index.format_date(member.membership_fee_start_date)}
     </:col>
+    <:col
+      :let={member}
+      :if={:membership_fee_type in @member_fields_visible}
+      label={
+        ~H"""
+        <.live_component
+          module={MvWeb.Components.SortHeaderComponent}
+          id={:sort_membership_fee_type}
+          field={:membership_fee_type}
+          label={gettext("Fee Type")}
+          sort_field={@sort_field}
+          sort_order={@sort_order}
+        />
+        """
+      }
+    >
+      <%= if member.membership_fee_type do %>
+        {member.membership_fee_type.name}
+      <% else %>
+        <span class="text-base-content/50">—</span>
+      <% end %>
+    </:col>
     <:col
       :let={member}
       :if={:membership_fee_status in @member_fields_visible}

lib/mv_web/live/member_live/index/field_visibility.ex

@@ -28,8 +28,8 @@ defmodule MvWeb.MemberLive.Index.FieldVisibility do
   alias Mv.Membership.Helpers.VisibilityConfig
 
   # Single UI key for "Membership Fee Status"; only this appears in the dropdown.
-  # Groups is also a pseudo field (not a DB attribute, but displayed in the table).
+  # Groups and membership_fee_type are also pseudo fields (not in member_fields(), displayed in the table).
-  @pseudo_member_fields [:membership_fee_status, :groups]
+  @pseudo_member_fields [:membership_fee_status, :membership_fee_type, :groups]
 
   # Export/API may accept this as alias; must not appear in the UI options list.
   @export_only_alias :payment_status
@@ -64,6 +64,25 @@ defmodule MvWeb.MemberLive.Index.FieldVisibility do
     member_fields ++ custom_field_names
   end
 
+  @doc """
+  Builds field selection from URL only: fields in `url_selection` are visible, all others false.
+  Use when `?fields=...` is in the URL so column visibility is not merged with global settings.
+  """
+  @spec selection_from_url_only(%{String.t() => boolean()}, [struct()]) :: %{
+          String.t() => boolean()
+        }
+  def selection_from_url_only(url_selection, custom_fields) when is_map(url_selection) do
+    all_fields = get_all_available_fields(custom_fields)
+
+    Enum.reduce(all_fields, %{}, fn field, acc ->
+      field_string = field_to_string(field)
+      visible = Map.get(url_selection, field_string, false)
+      Map.put(acc, field_string, visible)
+    end)
+  end
+
+  def selection_from_url_only(_, _), do: %{}
+
   @doc """
   Merges user field selection with global settings.
 

lib/mv_web/translations/member_fields.ex

@@ -30,6 +30,7 @@ defmodule MvWeb.Translations.MemberFields do
   def label(:country), do: gettext("Country")
   def label(:membership_fee_start_date), do: gettext("Membership Fee Start Date")
   def label(:membership_fee_status), do: gettext("Membership Fee Status")
+  def label(:membership_fee_type), do: gettext("Fee Type")
   def label(:groups), do: gettext("Groups")
 
   # Fallback for unknown fields

priv/gettext/de/LC_MESSAGES/default.po

@@ -2921,3 +2921,9 @@ msgstr "Sep."
 #, elixir-autogen, elixir-format
 msgid "Required for Vereinfacht integration and cannot be disabled."
 msgstr "Für die Vereinfacht-Integration erforderlich und kann nicht deaktiviert werden."
+
+#: lib/mv_web/live/member_live/index.html.heex
+#: lib/mv_web/translations/member_fields.ex
+#, elixir-autogen, elixir-format
+msgid "Fee Type"
+msgstr "Beitragsart"

priv/gettext/default.pot

@@ -2921,3 +2921,9 @@ msgstr ""
 #, elixir-autogen, elixir-format
 msgid "Required for Vereinfacht integration and cannot be disabled."
 msgstr ""
+
+#: lib/mv_web/live/member_live/index.html.heex
+#: lib/mv_web/translations/member_fields.ex
+#, elixir-autogen, elixir-format
+msgid "Fee Type"
+msgstr ""

priv/gettext/en/LC_MESSAGES/default.po

@@ -2921,3 +2921,9 @@ msgstr ""
 #, elixir-autogen, elixir-format
 msgid "Required for Vereinfacht integration and cannot be disabled."
 msgstr "Required for Vereinfacht integration and cannot be disabled."
+
+#: lib/mv_web/live/member_live/index.html.heex
+#: lib/mv_web/translations/member_fields.ex
+#, elixir-autogen, elixir-format
+msgid "Fee Type"
+msgstr "Fee Type"

test/mv/membership/members_csv_test.exs

@@ -199,6 +199,43 @@ defmodule Mv.Membership.MembersCSVTest do
       assert csv =~ "M,m@m.com,Paid"
     end
 
+    test "membership_fee_type column exports fee type name" do
+      columns = [
+        %{header: "First Name", kind: :member_field, key: "first_name"},
+        %{header: "Email", kind: :member_field, key: "email"},
+        %{header: "Fee Type", kind: :membership_fee_type, key: :membership_fee_type}
+      ]
+
+      member = %{
+        first_name: "M",
+        email: "m@m.com",
+        membership_fee_type: %{id: "ft-1", name: "Standard"}
+      }
+
+      iodata = MembersCSV.export([member], columns)
+      csv = IO.iodata_to_binary(iodata)
+
+      assert csv =~ "Fee Type"
+      assert csv =~ "Standard"
+      assert csv =~ "M,m@m.com,Standard"
+    end
+
+    test "membership_fee_type column exports empty when no fee type" do
+      columns = [
+        %{header: "First Name", kind: :member_field, key: "first_name"},
+        %{header: "Fee Type", kind: :membership_fee_type, key: :membership_fee_type}
+      ]
+
+      member = %{first_name: "M", email: "m@m.com", membership_fee_type: nil}
+
+      iodata = MembersCSV.export([member], columns)
+      csv = IO.iodata_to_binary(iodata)
+
+      assert csv =~ "Fee Type"
+      assert csv =~ "M,"
+      refute csv =~ "Standard"
+    end
+
     test "CSV injection: formula-like and dangerous prefixes are escaped with apostrophe" do
       member = %{
         first_name: "=SUM(A1:A10)",

test/mv_web/controllers/member_export_controller_test.exs

@@ -146,6 +146,70 @@ defmodule MvWeb.MemberExportControllerTest do
       refute header =~ "unknown_field"
     end
 
+    test "export includes membership_fee_type column when requested", %{
+      conn: conn,
+      member1: m1
+    } do
+      payload = %{
+        "selected_ids" => [m1.id],
+        "member_fields" => ["first_name", "membership_fee_type", "email"],
+        "custom_field_ids" => [],
+        "query" => nil,
+        "sort_field" => nil,
+        "sort_order" => nil
+      }
+
+      conn = get(conn, "/members")
+      csrf_token = csrf_token_from_conn(conn)
+
+      conn =
+        post(conn, "/members/export.csv", %{
+          "payload" => Jason.encode!(payload),
+          "_csrf_token" => csrf_token
+        })
+
+      assert conn.status == 200
+      body = response(conn, 200)
+      header = body |> export_lines() |> hd()
+
+      # Fee Type column is included (label from MemberFields.label(:membership_fee_type))
+      assert header =~ "Fee Type"
+      assert body =~ "Alice"
+    end
+
+    # Regression: when membership_fee_start_date is not in member_fields, Fee Type must still be exported (append fallback)
+    test "export includes Fee Type when only first_name and membership_fee_type are requested (no start_date)",
+         %{
+           conn: conn,
+           member1: m1
+         } do
+      payload = %{
+        "selected_ids" => [m1.id],
+        "member_fields" => ["first_name", "membership_fee_type"],
+        "custom_field_ids" => [],
+        "query" => nil,
+        "sort_field" => nil,
+        "sort_order" => nil
+      }
+
+      conn = get(conn, "/members")
+      csrf_token = csrf_token_from_conn(conn)
+
+      conn =
+        post(conn, "/members/export.csv", %{
+          "payload" => Jason.encode!(payload),
+          "_csrf_token" => csrf_token
+        })
+
+      assert conn.status == 200
+      body = response(conn, 200)
+      header = body |> export_lines() |> hd()
+
+      assert header =~ "Fee Type"
+      assert header =~ "First Name"
+      assert body =~ "Alice"
+    end
+
     test "export includes membership_fee_status computed field when requested", %{
       conn: conn,
       member1: m1
@@ -501,4 +565,40 @@ defmodule MvWeb.MemberExportControllerTest do
       assert membership_idx < active_idx
     end
   end
+
+  describe "POST /members/export.pdf" do
+    test "PDF export includes Fee Type column when requested without membership_fee_start_date",
+         %{
+           conn: conn
+         } do
+      m =
+        Fixtures.member_fixture(%{first_name: "PDF", last_name: "Test", email: "pdf@example.com"})
+
+      payload = %{
+        "selected_ids" => [m.id],
+        "member_fields" => ["first_name", "membership_fee_type"],
+        "custom_field_ids" => [],
+        "query" => nil,
+        "sort_field" => nil,
+        "sort_order" => nil
+      }
+
+      conn = get(conn, "/members")
+      csrf_token = csrf_token_from_conn(conn)
+
+      conn =
+        post(conn, "/members/export.pdf", %{
+          "payload" => Jason.encode!(payload),
+          "_csrf_token" => csrf_token
+        })
+
+      assert conn.status == 200
+      assert get_resp_header(conn, "content-type") |> List.first() =~ "application/pdf"
+
+      body = response(conn, 200)
+
+      # PDF is generated successfully with Fee Type in columns (regression: fee type without start_date)
+      assert is_binary(body) and byte_size(body) > 0
+    end
+  end
 end

test/mv_web/live/member_live/index/field_visibility_test.exs

@@ -56,6 +56,14 @@ defmodule MvWeb.MemberLive.Index.FieldVisibilityTest do
         assert field in result
       end)
     end
+
+    test "includes pseudo member fields (membership_fee_status, membership_fee_type, groups)" do
+      result = FieldVisibility.get_all_available_fields([])
+
+      assert :membership_fee_status in result
+      assert :membership_fee_type in result
+      assert :groups in result
+    end
   end
 
   describe "merge_with_global_settings/3" do
@@ -278,6 +286,20 @@ defmodule MvWeb.MemberLive.Index.FieldVisibilityTest do
     test "handles invalid input" do
       assert FieldVisibility.get_visible_member_fields(nil) == []
     end
+
+    test "returns membership_fee_type when visible in selection" do
+      selection = %{
+        "first_name" => true,
+        "membership_fee_type" => true,
+        "groups" => false
+      }
+
+      result = FieldVisibility.get_visible_member_fields(selection)
+
+      assert :membership_fee_type in result
+      assert :first_name in result
+      refute :groups in result
+    end
   end
 
   describe "get_visible_custom_fields/1" do

test/mv_web/member_live/index_field_visibility_test.exs

@@ -361,6 +361,18 @@ defmodule MvWeb.MemberLive.IndexFieldVisibilityTest do
       assert html =~ "Alice"
     end
 
+    test "URL with only custom field keeps custom field visible (no invalid fallback)", %{
+      conn: conn,
+      custom_field: custom_field
+    } do
+      conn = conn_with_oidc_user(conn)
+      id = custom_field.id
+      {:ok, _view, html} = live(conn, "/members?fields=custom_field_#{id}")
+
+      # Selection must not be treated as invalid; custom field column stays visible
+      assert html =~ "M001" or html =~ custom_field.name
+    end
+
     test "handles rapid toggling", %{conn: conn} do
       conn = conn_with_oidc_user(conn)
       {:ok, view, _html} = live(conn, "/members")