Add duplicate action

demo/lib/demo/tag.ex

@@ -14,7 +14,7 @@ defmodule Demo.Tag do
     timestamps()
   end
 
-  @required_fields ~w[name inserted_at]a
+  @required_fields ~w[name]a
 
   def update_changeset(category, attrs, _metadata \\ []) do
     category

demo/lib/demo_web/item_actions/duplicate_tag.ex

@@ -0,0 +1,72 @@
+defmodule DemoWeb.ItemActions.DuplicateTag do
+    @moduledoc false
+
+    use BackpexWeb, :item_action
+
+    alias Demo.Repo
+
+    @impl Backpex.ItemAction
+    def icon(assigns) do
+      ~H"""
+      <Heroicons.document_duplicate class="h-5 w-5 cursor-pointer transition duration-75 hover:scale-110 hover:text-green-600" />
+      """
+    end
+
+    @impl Backpex.ItemAction
+    def fields do
+      [
+        name: %{
+          module: Backpex.Fields.Text,
+          label: "Name",
+          searchable: true,
+          placeholder: "Tag name"
+        }
+      ]
+
+      # DemoWeb.TagLive.fields()
+    end
+
+    @impl Backpex.ItemAction
+    def label(_assigns), do: "Duplicate"
+
+    @impl Backpex.ItemAction
+    def confirm(_assigns), do: "Please complete the form to duplicate the item."
+
+    @impl Backpex.ItemAction
+    def confirm_label(assigns), do: "Duplicate"
+
+    @impl Backpex.ItemAction
+    def cancel_label(assigns), do: "Cancel"
+
+    @impl Backpex.ItemAction
+    def changeset(item, change, target, assigns) do
+      Demo.Tag.create_changeset(item, change)
+    end
+
+    @impl Backpex.ItemAction
+    def init_change(assigns) do
+      [item | _other] = assigns.selected_items
+
+      item
+    end
+
+    @impl Backpex.ItemAction
+    def handle(socket, [item | _items] = items, params) do
+      result =
+        %Demo.Tag{}
+        |> Demo.Tag.create_changeset(params, [target: nil, assigns: socket.assigns])
+        |> Repo.insert()
+
+      socket =
+        case result do
+          {:ok, created} ->
+            put_flash(socket, :info, "Item has been duplicated.")
+
+          _error ->
+            put_flash(socket, :error, "Error while duplicating item.")
+        end
+
+
+      {:noreply, socket}
+    end
+end

demo/lib/demo_web/live/tag_live.ex

@@ -26,8 +26,22 @@ defmodule DemoWeb.TagLive do
       },
       inserted_at: %{
         module: Backpex.Fields.DateTime,
-        label: "Date"
+        label: "Inserted At",
+        only: [:show, :index]
       }
     ]
   end
+
+  @impl Backpex.LiveResource
+  def item_actions(default_actions) do
+    Enum.concat(
+      [
+        duplicate: %{
+          module: DemoWeb.ItemActions.DuplicateTag,
+          only: [:row]
+        }
+      ],
+      default_actions
+    )
+  end
 end

lib/backpex/item_actions/item_action.ex

@@ -197,13 +197,6 @@ defmodule Backpex.ItemAction do
     quote do
       @before_compile Backpex.ItemAction
       @behaviour Backpex.ItemAction
-
-      @impl Backpex.ItemAction
-      def init_change(_assigns) do
-        types = Backpex.Field.changeset_types(fields())
-
-        {%{}, types}
-      end
     end
   end
 
@@ -225,6 +218,13 @@ defmodule Backpex.ItemAction do
         init_change(assigns)
         |> Ecto.Changeset.change()
       end
+
+      @impl Backpex.ItemAction
+      def init_change(_assigns) do
+        types = Backpex.Field.changeset_types(fields())
+
+        {%{}, types}
+      end
     end
   end
 end