restrict ammo groups by user_id

lib/cannery/ammo.ex

@@ -52,7 +52,7 @@ defmodule Cannery.Ammo do
 
   """
   @spec get_average_cost_for_ammo_type!(AmmoType.t()) :: float()
-  def get_average_cost_for_ammo_type!(%{id: ammo_type_id}) do
+  def get_average_cost_for_ammo_type!(%AmmoType{id: ammo_type_id}) do
     Repo.one!(
       from ag in AmmoGroup,
         where: ag.ammo_type_id == ^ammo_type_id,
@@ -140,21 +140,34 @@ defmodule Cannery.Ammo do
     do: AmmoType.changeset(ammo_type, attrs)
 
   @doc """
-  Returns the list of ammo_groups.
+  Returns the list of ammo_groups for a user and type.
+
+  ## Examples
+
+      iex> list_ammo_groups_for_type(%AmmoType{id: 123}, %User{id: 123})
+      [%AmmoGroup{}, ...]
+
+  """
+  @spec list_ammo_groups_for_type(AmmoType.t(), User.t()) :: [AmmoGroup.t()]
+  def list_ammo_groups_for_type(%AmmoType{id: ammo_type_id}, %User{id: user_id}) do
+    Repo.all(
+      from am in AmmoGroup,
+        where: am.ammo_type_id == ^ammo_type_id,
+        where: am.user_id == ^user_id
+    )
+  end
+
+  @doc """
+  Returns the list of ammo_groups for a user.
 
   ## Examples
 
       iex> list_ammo_groups(%User{id: 123})
       [%AmmoGroup{}, ...]
 
-      iex> list_ammo_groups(123)
-      [%AmmoGroup{}, ...]
-
   """
-  @spec list_ammo_groups(User.t() | User.id()) :: [AmmoGroup.t()]
-  def list_ammo_groups(%{id: user_id}), do: list_ammo_groups(user_id)
-
-  def list_ammo_groups(user_id) do
+  @spec list_ammo_groups(User.t()) :: [AmmoGroup.t()]
+  def list_ammo_groups(%User{id: user_id}) do
     Repo.all(from am in AmmoGroup, where: am.user_id == ^user_id)
   end
 

lib/cannery_web/live/ammo_type_live/show.ex

@@ -5,7 +5,7 @@ defmodule CanneryWeb.AmmoTypeLive.Show do
 
   use CanneryWeb, :live_view
   import CanneryWeb.AmmoGroupLive.AmmoGroupCard
-  alias Cannery.{Ammo, Repo}
+  alias Cannery.{Ammo}
 
   @impl true
   def mount(_params, session, socket) do
@@ -13,14 +13,16 @@ defmodule CanneryWeb.AmmoTypeLive.Show do
   end
 
   @impl true
-  def handle_params(%{"id" => id}, _, socket) do
-    ammo_type = Ammo.get_ammo_type!(id) |> Repo.preload(:ammo_groups)
+  def handle_params(%{"id" => id}, _, %{assigns: %{current_user: current_user}} = socket) do
+    ammo_type = Ammo.get_ammo_type!(id)
+    ammo_groups = ammo_type |> Ammo.list_ammo_groups_for_type(current_user)
 
     socket =
       socket
       |> assign(
         page_title: page_title(socket.assigns.live_action),
         ammo_type: ammo_type,
+        ammo_groups: ammo_groups,
         avg_cost_per_round: ammo_type |> Ammo.get_average_cost_for_ammo_type!()
       )
 

lib/cannery_web/live/ammo_type_live/show.html.heex

@@ -92,10 +92,10 @@
   <hr class="hr">
 
   <div>
-    <%= if @ammo_type.ammo_groups |> Enum.empty?() do %>
+    <%= if @ammo_groups |> Enum.empty?() do %>
       No ammo for this type
     <% else %>
-      <%= for ammo_group <- @ammo_type.ammo_groups do %>
+      <%= for ammo_group <- @ammo_groups do %>
         <.ammo_group_card ammo_group={ammo_group} />
       <% end %>
     <% end %>