Performance improvements: Add Brainstorming Label to idea + broadcast lane update

lib/mindwendel/brainstormings.ex

@@ -98,6 +98,10 @@ defmodule Mindwendel.Brainstormings do
     end
   end
 
+  def get_bare_brainstorming!(id) do
+    Repo.get!(Brainstorming, id)
+  end
+
   @doc """
   Gets a single brainstorming with the admin url id
   """

lib/mindwendel/brainstormings/idea_idea_label.ex

@@ -24,4 +24,13 @@ defmodule Mindwendel.Brainstormings.IdeaIdeaLabel do
       name: :idea_idea_labels_idea_id_idea_label_id_index
     )
   end
+
+  def bare_creation_changeset(idea_idea_label \\ %__MODULE__{}, attrs) do
+    idea_idea_label
+    |> cast(attrs, [:idea_id, :idea_label_id])
+    |> validate_required([:idea_id, :idea_label_id])
+    |> unique_constraint([:idea_id, :idea_label_id],
+      name: :idea_idea_labels_idea_id_idea_label_id_index
+    )
+  end
 end

lib/mindwendel/idea_labels.ex

@@ -28,29 +28,24 @@ defmodule Mindwendel.IdeaLabels do
     nil
   end
 
-  def add_idea_label_to_idea(%Idea{} = idea, %IdeaLabel{} = idea_label) do
-    idea = Repo.preload(idea, :idea_labels)
-
-    idea_labels =
-      (idea.idea_labels ++ [idea_label])
-      |> Enum.map(&Ecto.Changeset.change/1)
-
+  # As the broadcast results in a full reload of the ideas, we don't need to actually update
+  # the idea struct, a new association is enough
+  def add_idea_label_to_idea(idea, idea_label_id) do
     result =
-      idea
-      |> Ecto.Changeset.change()
-      |> Ecto.Changeset.put_assoc(:idea_labels, idea_labels)
-      |> Repo.update()
+      %{idea_id: idea.id, idea_label_id: idea_label_id}
+      |> IdeaIdeaLabel.bare_creation_changeset()
+      |> Repo.insert()
 
     Lanes.broadcast_lanes_update(idea.brainstorming_id)
     result
   end
 
-  def remove_idea_label_from_idea(%Idea{} = idea, %IdeaLabel{} = idea_label) do
+  def remove_idea_label_from_idea(%Idea{} = idea, idea_label_id) do
     result =
       from(idea_idea_label in IdeaIdeaLabel,
         where:
           idea_idea_label.idea_id == ^idea.id and
-            idea_idea_label.idea_label_id == ^idea_label.id
+            idea_idea_label.idea_label_id == ^idea_label_id
       )
       |> Repo.delete_all()
 

lib/mindwendel/lanes.ex

@@ -72,10 +72,7 @@ defmodule Mindwendel.Lanes do
   def get_lanes_for_brainstorming_with_labels_filtered(id) do
     {:ok, brainstorming} = Brainstormings.get_brainstorming(id)
 
-    filter_label =
-      if length(brainstorming.filter_labels_ids) > 0,
-        do: %{filter_labels_ids: brainstorming.filter_labels_ids},
-        else: %{}
+    filter_label = %{filter_labels_ids: brainstorming.filter_labels_ids}
 
     get_lanes_for_brainstorming(id, filter_label)
   end
@@ -89,7 +86,7 @@ defmodule Mindwendel.Lanes do
       [%Lane{}, ...]
 
   """
-  def get_lanes_for_brainstorming(id, filters \\ %{}) do
+  def get_lanes_for_brainstorming(id, filters \\ %{filter_labels_ids: []}) do
     lane_query =
       from lane in Lane,
         where: lane.brainstorming_id == ^id,
@@ -105,6 +102,10 @@ defmodule Mindwendel.Lanes do
     |> Repo.preload(ideas: {ideas_advanced_query, [:link, :likes, :idea_labels, :files]})
   end
 
+  defp build_ideas_query_with_filter(%{filter_labels_ids: []}) do
+    from(idea in Idea)
+  end
+
   defp build_ideas_query_with_filter(%{filter_labels_ids: filter_labels_ids}) do
     distinct_ideas =
       from idea in Idea,
@@ -118,10 +119,6 @@ defmodule Mindwendel.Lanes do
     )
   end
 
-  defp build_ideas_query_with_filter(%{} = _filters) do
-    from(idea in Idea)
-  end
-
   @doc """
   Creates a lane.
 

lib/mindwendel/repo.ex

@@ -2,4 +2,8 @@ defmodule Mindwendel.Repo do
   use Ecto.Repo,
     otp_app: :mindwendel,
     adapter: Ecto.Adapters.Postgres
+
+  def count(query) do
+    aggregate(query, :count)
+  end
 end

lib/mindwendel_web/live/idea_live/card_component.ex

@@ -6,8 +6,8 @@ defmodule MindwendelWeb.IdeaLive.CardComponent do
   alias Mindwendel.Likes
 
   @impl true
-  def handle_event("delete_idea", %{"id" => id}, socket) do
-    idea = Ideas.get_idea!(id)
+  def handle_event("delete_idea", _params, socket) do
+    idea = socket.assigns.idea
 
     %{current_user: current_user, brainstorming: brainstorming} = socket.assigns
 
@@ -19,50 +19,37 @@ defmodule MindwendelWeb.IdeaLive.CardComponent do
     {:noreply, socket}
   end
 
-  def handle_event("like", %{"id" => id}, socket) do
-    Likes.add_like(id, socket.assigns.current_user.id)
+  def handle_event("like", _params, socket) do
+    Likes.add_like(socket.assigns.idea.id, socket.assigns.current_user.id)
 
     {:noreply, socket}
   end
 
-  def handle_event("unlike", %{"id" => id}, socket) do
-    Likes.delete_like(id, socket.assigns.current_user.id)
+  def handle_event("unlike", _params, socket) do
+    Likes.delete_like(socket.assigns.idea.id, socket.assigns.current_user.id)
 
     {:noreply, socket}
   end
 
   def handle_event(
         "add_idea_label_to_idea",
         %{
-          "idea-id" => idea_id,
           "idea-label-id" => idea_label_id
         },
         socket
       ) do
-    idea = Ideas.get_idea!(idea_id)
-    idea_label = IdeaLabels.get_idea_label(idea_label_id)
-
-    case(IdeaLabels.add_idea_label_to_idea(idea, idea_label)) do
-      {:ok, _idea} ->
-        {:noreply, socket}
-
-      {:error, _changeset} ->
-        {:noreply, socket}
-    end
+    IdeaLabels.add_idea_label_to_idea(socket.assigns.idea, idea_label_id)
+    {:noreply, socket}
   end
 
   def handle_event(
         "remove_idea_label_from_idea",
         %{
-          "idea-id" => idea_id,
           "idea-label-id" => idea_label_id
         },
         socket
       ) do
-    idea = Ideas.get_idea!(idea_id)
-    idea_label = IdeaLabels.get_idea_label(idea_label_id)
-
-    IdeaLabels.remove_idea_label_from_idea(idea, idea_label)
+    IdeaLabels.remove_idea_label_from_idea(socket.assigns.idea, idea_label_id)
     {:noreply, socket}
   end
 end

lib/mindwendel_web/live/idea_live/card_component.html.heex

@@ -13,7 +13,6 @@
         class="float-end ms-3 mb-3"
         phx-click="delete_idea"
         phx-target={@myself}
-        phx-value-id={@idea.id}
         title={gettext("Delete idea")}
         data-confirm={gettext("Are you sure you want to delete this idea?")}
       >
@@ -97,7 +96,6 @@
             data-testid={brainstorming_idea_label.id}
             phx-click="add_idea_label_to_idea"
             phx-target={@myself}
-            phx-value-idea-id={@idea.id}
             title={"Label #{brainstorming_idea_label.name}"}
             phx-value-idea-label-id={brainstorming_idea_label.id}
           >
@@ -116,7 +114,6 @@
             data-testid={brainstorming_idea_label.id}
             phx-click="remove_idea_label_from_idea"
             phx-target={@myself}
-            phx-value-idea-id={@idea.id}
             title={"Label #{brainstorming_idea_label.name}"}
             phx-value-idea-label-id={brainstorming_idea_label.id}
           >
@@ -145,11 +142,11 @@
       </span>
       <span class="me-1 text-dark">{length(@idea.likes)}</span>
       <%= if Mindwendel.Likes.exists_user_in_likes?(@idea.likes, @current_user.id) do %>
-        <.link phx-click="unlike" phx-target={@myself} phx-value-id={@idea.id} title="Unlike">
+        <.link phx-click="unlike" phx-target={@myself} title="Unlike">
           <i class="bi-star-fill"></i>
         </.link>
       <% else %>
-        <.link phx-click="like" phx-target={@myself} phx-value-id={@idea.id} title="Like">
+        <.link phx-click="like" phx-target={@myself} title="Like">
           <i class="bi-star"></i>
         </.link>
       <% end %>

priv/gettext/default.pot

@@ -36,7 +36,7 @@ msgid "%{name} - New Idea"
 msgstr ""
 
 #: lib/mindwendel_web/live/comment_live/show_component.html.heex:22
-#: lib/mindwendel_web/live/idea_live/card_component.html.heex:18
+#: lib/mindwendel_web/live/idea_live/card_component.html.heex:17
 #, elixir-autogen, elixir-format
 msgid "Are you sure you want to delete this idea?"
 msgstr ""
@@ -195,7 +195,7 @@ msgstr ""
 
 #: lib/mindwendel_web/controllers/admin/brainstorming_html/export.html.heex:3
 #: lib/mindwendel_web/live/comment_live/show_component.html.heex:40
-#: lib/mindwendel_web/live/idea_live/card_component.html.heex:85
+#: lib/mindwendel_web/live/idea_live/card_component.html.heex:84
 #, elixir-autogen, elixir-format
 msgid "By"
 msgstr ""
@@ -451,13 +451,13 @@ msgstr ""
 msgid "No lanes available"
 msgstr ""
 
-#: lib/mindwendel_web/live/idea_live/card_component.html.heex:25
+#: lib/mindwendel_web/live/idea_live/card_component.html.heex:24
 #, elixir-autogen, elixir-format
 msgid "Edit idea"
 msgstr ""
 
 #: lib/mindwendel_web/live/comment_live/show_component.html.heex:30
-#: lib/mindwendel_web/live/idea_live/card_component.html.heex:17
+#: lib/mindwendel_web/live/idea_live/card_component.html.heex:16
 #, elixir-autogen, elixir-format
 msgid "Delete idea"
 msgstr ""
@@ -472,7 +472,7 @@ msgstr ""
 msgid "Additional Attachment"
 msgstr ""
 
-#: lib/mindwendel_web/live/idea_live/card_component.html.heex:75
+#: lib/mindwendel_web/live/idea_live/card_component.html.heex:74
 #: lib/mindwendel_web/live/idea_live/form_component.html.heex:43
 #: lib/mindwendel_web/live/idea_live/show_component.html.heex:27
 #, elixir-autogen, elixir-format
@@ -529,8 +529,8 @@ msgstr ""
 msgid "No comments available"
 msgstr ""
 
-#: lib/mindwendel_web/live/idea_live/card_component.html.heex:33
-#: lib/mindwendel_web/live/idea_live/card_component.html.heex:140
+#: lib/mindwendel_web/live/idea_live/card_component.html.heex:32
+#: lib/mindwendel_web/live/idea_live/card_component.html.heex:137
 #, elixir-autogen, elixir-format
 msgid "Show idea"
 msgstr ""

test/mindwendel/brainstormings_test.exs

@@ -322,8 +322,8 @@ defmodule Mindwendel.BrainstormingsTest do
 
       like = Factory.insert!(:like, idea: idea)
 
-      {:ok, idea} =
-        IdeaLabels.add_idea_label_to_idea(idea, Enum.at(brainstorming.labels, 0))
+      {:ok, _idea_idea_label} =
+        IdeaLabels.add_idea_label_to_idea(idea, Enum.at(brainstorming.labels, 0).id)
 
       idea = idea |> Repo.preload([:idea_labels])