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"]
+                             ["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()
@@ -323,10 +323,14 @@ defmodule Mv.Membership.MemberExport do
       |> Enum.filter(&(&1 in @domain_member_field_strings))
       |> order_member_fields_like_table()
 
-    # final member_fields list (used for column specs order): table order + computed inserted
+    # 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
     ordered_member_fields =
       selectable_member_fields
       |> insert_computed_fields_like_table(computed_fields)
+      |> then(fn fields -> fields ++ groups_field end)
 
     %{
       selected_ids: filter_valid_uuids(extract_list(params, "selected_ids")),

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
@@ -241,16 +244,22 @@ defmodule Mv.Membership.MemberExport.Build do
   defp maybe_sort(query, _field, nil), do: {query, false}
 
   defp maybe_sort(query, field, order) when is_binary(field) do
-    if custom_field_sort?(field) do
-      {query, true}
-    else
-      field_atom = String.to_existing_atom(field)
+    cond do
+      field == "groups" ->
+        # Groups sort → in-memory nach dem Read (wie Tabelle)
+        {query, true}
 
-      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
+      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}
@@ -260,11 +269,25 @@ defmodule Mv.Membership.MemberExport.Build do
     do: []
 
   defp sort_members_by_custom_field(members, field, order, custom_fields) when is_binary(field) do
+    if field == "groups" do
+      sort_members_by_groups_export(members, order)
+    else
+      sort_by_custom_field_value(members, field, order, custom_fields)
+    end
+  end
+
+  defp sort_by_custom_field_value(members, field, order, custom_fields) do
     id_str = String.trim_leading(field, @custom_field_prefix)
     custom_field = Enum.find(custom_fields, fn cf -> to_string(cf.id) == id_str end)
 
-    if is_nil(custom_field), do: members
+    if is_nil(custom_field) do
+      members
+    else
+      sort_members_with_custom_field(members, custom_field, order)
+    end
+  end
 
+  defp sort_members_with_custom_field(members, custom_field, order) do
     key_fn = fn member ->
       cfv = find_cfv(member, custom_field)
       raw = if cfv, do: cfv.value, else: nil
@@ -277,6 +300,26 @@ defmodule Mv.Membership.MemberExport.Build do
     |> Enum.map(fn {m, _} -> m end)
   end
 
+  defp sort_members_by_groups_export(members, order) do
+    # Members with groups first, then by first group name alphabetically (min = first by sort order)
+    # Match table behavior from MvWeb.MemberLive.Index.sort_members_by_groups/2
+    first_group_name = fn member ->
+      (member.groups || [])
+      |> Enum.map(& &1.name)
+      |> Enum.min(fn -> nil end)
+    end
+
+    members
+    |> Enum.sort_by(fn member ->
+      name = first_group_name.(member)
+      # Nil (no groups) sorts last in asc, first in desc
+      {name == nil, name || ""}
+    end)
+    |> then(fn list ->
+      if order == "desc", do: Enum.reverse(list), else: list
+    end)
+  end
+
   defp find_cfv(member, custom_field) do
     (member.custom_field_values || [])
     |> Enum.find(fn cfv ->
@@ -294,6 +337,13 @@ 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 +393,19 @@ 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 +424,7 @@ 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 +454,11 @@ 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 +492,15 @@ 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(),

lib/mv/membership/members_csv.ex

@@ -59,6 +59,11 @@ defmodule Mv.Membership.MembersCSV do
     if is_binary(value), do: value, else: ""
   end
 
+  defp cell_value(member, %{kind: :groups, key: :groups}) 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
@@ -97,4 +102,13 @@ defmodule Mv.Membership.MembersCSV do
   defp format_member_value(%DateTime{} = dt), do: DateTime.to_iso8601(dt)
   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
 end

lib/mv_web/controllers/member_export_controller.ex

@@ -18,7 +18,8 @@ defmodule MvWeb.MemberExportController do
   alias MvWeb.MemberLive.Index.MembershipFeeStatus
   use Gettext, backend: MvWeb.Gettext
 
-  @member_fields_allowlist Mv.Constants.member_fields() |> Enum.map(&Atom.to_string/1)
+  @member_fields_allowlist (Mv.Constants.member_fields() |> Enum.map(&Atom.to_string/1)) ++
+                             ["groups"]
   @computed_export_fields ["membership_fee_status"]
   @custom_field_prefix Mv.Constants.custom_field_prefix()
 
@@ -83,6 +84,7 @@ defmodule MvWeb.MemberExportController do
     domain_fields = Mv.Constants.member_fields() |> Enum.map(&Atom.to_string/1)
     selectable = Enum.filter(member_fields, fn f -> f in domain_fields end)
     computed = Enum.filter(member_fields, fn f -> f in @computed_export_fields end)
+    # "groups" is neither a domain field nor a computed field, it's handled separately
     {selectable, computed}
   end
 
@@ -235,12 +237,15 @@ defmodule MvWeb.MemberExportController do
     need_cycles =
       parsed.computed_fields != [] and "membership_fee_status" in parsed.computed_fields
 
+    need_groups = "groups" in parsed.member_fields
+
     query =
       Member
       |> Ash.Query.new()
       |> Ash.Query.select(select_fields)
       |> load_custom_field_values_query(parsed.custom_field_ids)
       |> maybe_load_cycles(need_cycles, parsed.show_current_cycle)
+      |> maybe_load_groups(need_groups)
 
     query =
       if parsed.selected_ids != [] do
@@ -284,6 +289,13 @@ defmodule MvWeb.MemberExportController 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
+
   # 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
@@ -329,17 +341,23 @@ defmodule MvWeb.MemberExportController do
   defp maybe_sort_export(query, _field, nil), do: {query, false}
 
   defp maybe_sort_export(query, field, order) when is_binary(field) do
-    if custom_field_sort?(field) do
-      # Custom field sort → in-memory nach dem Read (wie Tabelle)
-      {query, true}
-    else
-      field_atom = String.to_existing_atom(field)
+    cond do
+      field == "groups" ->
+        # Groups sort → in-memory nach dem Read (wie Tabelle)
+        {query, true}
 
-      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
+      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
     end
   rescue
     ArgumentError -> {query, false}
@@ -358,6 +376,15 @@ defmodule MvWeb.MemberExportController do
   defp sort_members_by_custom_field_export(members, field, order, custom_fields)
        when is_binary(field) do
     order = order || "asc"
+
+    if field == "groups" do
+      sort_members_by_groups_export(members, order)
+    else
+      sort_by_custom_field_value(members, field, order, custom_fields)
+    end
+  end
+
+  defp sort_by_custom_field_value(members, field, order, custom_fields) do
     id_str = String.trim_leading(field, @custom_field_prefix)
 
     custom_field =
@@ -387,6 +414,26 @@ defmodule MvWeb.MemberExportController do
     end
   end
 
+  defp sort_members_by_groups_export(members, order) do
+    # Members with groups first, then by first group name alphabetically (min = first by sort order)
+    # Match table behavior from MvWeb.MemberLive.Index.sort_members_by_groups/2
+    first_group_name = fn member ->
+      (member.groups || [])
+      |> Enum.map(& &1.name)
+      |> Enum.min(fn -> nil end)
+    end
+
+    members
+    |> Enum.sort_by(fn member ->
+      name = first_group_name.(member)
+      # Nil (no groups) sorts last in asc, first in desc
+      {name == nil, name || ""}
+    end)
+    |> then(fn list ->
+      if order == "desc", do: Enum.reverse(list), else: list
+    end)
+  end
+
   defp has_non_empty_custom_field_value?(member, custom_field) do
     case find_cfv(member, custom_field) do
       nil ->
@@ -441,6 +488,19 @@ defmodule MvWeb.MemberExportController do
         }
       end)
 
+    groups_col =
+      if "groups" in parsed.member_fields do
+        [
+          %{
+            header: groups_field_header(conn),
+            kind: :groups,
+            key: :groups
+          }
+        ]
+      else
+        []
+      end
+
     custom_cols =
       parsed.custom_field_ids
       |> Enum.map(fn id ->
@@ -459,7 +519,7 @@ defmodule MvWeb.MemberExportController do
       end)
       |> Enum.reject(&is_nil/1)
 
-    member_cols ++ computed_cols ++ custom_cols
+    member_cols ++ computed_cols ++ groups_col ++ custom_cols
   end
 
   # --- headers: use MemberFields.label for translations ---
@@ -499,6 +559,10 @@ defmodule MvWeb.MemberExportController do
     cf.name
   end
 
+  defp groups_field_header(_conn) do
+    MemberFields.label(:groups)
+  end
+
   defp humanize_field(str) do
     str
     |> String.replace("_", " ")

lib/mv_web/live/member_live/index.ex

@@ -682,6 +682,19 @@ defmodule MvWeb.MemberLive.Index do
         |> update_selection_assigns()
       end
 
+    # Update sort components after rendering
+    socket =
+      if socket.assigns[:sort_needs_update] do
+        old_field = socket.assigns[:previous_sort_field] || socket.assigns.sort_field
+
+        socket
+        |> update_sort_components(old_field, socket.assigns.sort_field, socket.assigns.sort_order)
+        |> assign(:sort_needs_update, false)
+        |> assign(:previous_sort_field, nil)
+      else
+        socket
+      end
+
     {:noreply, socket}
   end
 
@@ -940,9 +953,10 @@ defmodule MvWeb.MemberLive.Index do
       )
 
     # Sort in memory if needed (custom fields, groups, group_count; computed fields are blocked)
+    # Note: :groups is in computed_member_fields() but can be sorted in-memory, so we only block :membership_fee_status
     members =
       if sort_after_load and
-           socket.assigns.sort_field not in FieldVisibility.computed_member_fields() do
+           socket.assigns.sort_field != :membership_fee_status do
         sort_members_in_memory(
           members,
           socket.assigns.sort_field,
@@ -1044,21 +1058,15 @@ defmodule MvWeb.MemberLive.Index do
   defp maybe_sort(query, _field, nil, _custom_fields), do: {query, false}
 
   defp maybe_sort(query, field, order, _custom_fields) do
-    if computed_field?(field) do
+    # :groups is in computed_member_fields() but can be sorted in-memory
+    # Only :membership_fee_status should be blocked from sorting
+    if field == :membership_fee_status or field == "membership_fee_status" do
       {query, false}
     else
       apply_sort_to_query(query, field, order)
     end
   end
 
-  defp computed_field?(field) do
-    computed_atoms = FieldVisibility.computed_member_fields()
-    computed_strings = Enum.map(computed_atoms, &Atom.to_string/1)
-
-    (is_atom(field) and field in computed_atoms) or
-      (is_binary(field) and field in computed_strings)
-  end
-
   defp apply_sort_to_query(query, field, order) do
     cond do
       # Groups sort -> after load (in memory)
@@ -1086,13 +1094,19 @@ defmodule MvWeb.MemberLive.Index do
   end
 
   defp valid_sort_field?(field) when is_atom(field) do
-    if field in FieldVisibility.computed_member_fields(),
-      do: false,
-      else: valid_sort_field_db_or_custom?(field)
+    # :groups is in computed_member_fields() but can be sorted
+    # Only :membership_fee_status should be blocked
+    if field == :membership_fee_status do
+      false
+    else
+      valid_sort_field_db_or_custom?(field)
+    end
   end
 
   defp valid_sort_field?(field) when is_binary(field) do
-    if field in Enum.map(FieldVisibility.computed_member_fields(), &Atom.to_string/1) do
+    # "groups" is in computed_member_fields() but can be sorted
+    # Only "membership_fee_status" should be blocked
+    if field == "membership_fee_status" do
       false
     else
       valid_sort_field_db_or_custom?(field)
@@ -1249,10 +1263,13 @@ defmodule MvWeb.MemberLive.Index do
   defp maybe_update_sort(socket, %{"sort_field" => sf, "sort_order" => so}) do
     field = determine_field(socket.assigns.sort_field, sf)
     order = determine_order(socket.assigns.sort_order, so)
+    old_field = socket.assigns.sort_field
 
     socket
     |> assign(:sort_field, field)
     |> assign(:sort_order, order)
+    |> assign(:sort_needs_update, old_field != field or socket.assigns.sort_order != order)
+    |> assign(:previous_sort_field, old_field)
   end
 
   defp maybe_update_sort(socket, _), do: socket
@@ -1261,17 +1278,27 @@ defmodule MvWeb.MemberLive.Index do
   defp determine_field(default, nil), do: default
 
   defp determine_field(default, sf) when is_binary(sf) do
-    computed_strings = Enum.map(FieldVisibility.computed_member_fields(), &Atom.to_string/1)
+    # Handle "groups" specially - it's in computed_member_fields() but can be sorted
+    if sf == "groups" do
+      :groups
+    else
+      computed_strings = Enum.map(FieldVisibility.computed_member_fields(), &Atom.to_string/1)
 
-    if sf in computed_strings,
-      do: default,
-      else: determine_field_after_computed_check(default, sf)
+      if sf in computed_strings,
+        do: default,
+        else: determine_field_after_computed_check(default, sf)
+    end
   end
 
   defp determine_field(default, sf) when is_atom(sf) do
-    if sf in FieldVisibility.computed_member_fields(),
-      do: default,
-      else: determine_field_after_computed_check(default, sf)
+    # Handle :groups specially - it's in computed_member_fields() but can be sorted
+    if sf == :groups do
+      :groups
+    else
+      if sf in FieldVisibility.computed_member_fields(),
+        do: default,
+        else: determine_field_after_computed_check(default, sf)
+    end
   end
 
   defp determine_field(default, _), do: default
@@ -1620,6 +1647,14 @@ 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
+        ordered_member_fields_db ++ ["groups"]
+      else
+        ordered_member_fields_db
+      end
+
     # Order custom fields like the table (same as dynamic_cols / all_custom_fields order)
     ordered_custom_field_ids =
       socket.assigns.all_custom_fields
@@ -1628,7 +1663,11 @@ defmodule MvWeb.MemberLive.Index do
 
     %{
       selected_ids: socket.assigns.selected_members |> MapSet.to_list(),
-      member_fields: Enum.map(ordered_member_fields_db, &Atom.to_string/1),
+      member_fields:
+        Enum.map(member_fields_with_groups, fn
+          f when is_atom(f) -> Atom.to_string(f)
+          f when is_binary(f) -> f
+        end),
       computed_fields: Enum.map(ordered_computed_fields, &Atom.to_string/1),
       custom_field_ids: ordered_custom_field_ids,
       column_order:

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

@@ -331,6 +331,7 @@
     </:col>
     <:col
       :let={member}
+      :if={:groups in @member_fields_visible}
       label={
         ~H"""
         <.live_component

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

@@ -28,7 +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.
-  @pseudo_member_fields [:membership_fee_status]
+  # Groups is also a pseudo field (not a DB attribute, but displayed in the table).
+  @pseudo_member_fields [:membership_fee_status, :groups]
 
   # Export/API may accept this as alias; must not appear in the UI options list.
   @export_only_alias :payment_status
@@ -201,7 +202,7 @@ defmodule MvWeb.MemberLive.Index.FieldVisibility do
   """
   @spec get_visible_member_fields_computed(%{String.t() => boolean()}) :: [atom()]
   def get_visible_member_fields_computed(field_selection) when is_map(field_selection) do
-    computed_set = MapSet.new(@pseudo_member_fields)
+    computed_set = MapSet.new([:membership_fee_status])
 
     field_selection
     |> Enum.filter(fn {field_string, visible} ->

lib/mv_web/translations/member_fields.ex

@@ -29,6 +29,7 @@ defmodule MvWeb.Translations.MemberFields do
   def label(:postal_code), do: gettext("Postal Code")
   def label(:membership_fee_start_date), do: gettext("Membership Fee Start Date")
   def label(:membership_fee_status), do: gettext("Membership Fee Status")
+  def label(:groups), do: gettext("Groups")
 
   # Fallback for unknown fields
   def label(field) do

priv/gettext/de/LC_MESSAGES/default.po

@@ -2218,6 +2218,7 @@ msgstr "Gruppe erfolgreich gespeichert."
 #: lib/mv_web/live/group_live/index.ex
 #: lib/mv_web/live/member_live/index.html.heex
 #: lib/mv_web/live/member_live/show.ex
+#: lib/mv_web/translations/member_fields.ex
 #, elixir-autogen, elixir-format
 msgid "Groups"
 msgstr "Gruppen"

priv/gettext/default.pot

@@ -2219,6 +2219,7 @@ msgstr ""
 #: lib/mv_web/live/group_live/index.ex
 #: lib/mv_web/live/member_live/index.html.heex
 #: lib/mv_web/live/member_live/show.ex
+#: lib/mv_web/translations/member_fields.ex
 #, elixir-autogen, elixir-format
 msgid "Groups"
 msgstr ""

priv/gettext/en/LC_MESSAGES/default.po

@@ -2219,6 +2219,7 @@ msgstr ""
 #: lib/mv_web/live/group_live/index.ex
 #: lib/mv_web/live/member_live/index.html.heex
 #: lib/mv_web/live/member_live/show.ex
+#: lib/mv_web/translations/member_fields.ex
 #, elixir-autogen, elixir-format
 msgid "Groups"
 msgstr ""