Added CSV export for items

Gemfile

@@ -76,3 +76,5 @@ gem "authentication-zero", "~> 4.0"
 
 
 gem "rqrcode", "~> 3.2"
+
+gem "csv", "~> 3.3"

Gemfile.lock

@@ -107,6 +107,7 @@ GEM
     concurrent-ruby (1.3.6)
     connection_pool (3.0.2)
     crass (1.0.6)
+    csv (3.3.5)
     date (3.5.1)
     debug (1.11.1)
       irb (~> 1.10)
@@ -423,6 +424,7 @@ DEPENDENCIES
   brakeman
   bundler-audit
   capybara
+  csv (~> 3.3)
   debug
   hotwire-spark
   image_processing (~> 1.2)
@@ -479,6 +481,7 @@ CHECKSUMS
   concurrent-ruby (1.3.6) sha256=6b56837e1e7e5292f9864f34b69c5a2cbc75c0cf5338f1ce9903d10fa762d5ab
   connection_pool (3.0.2) sha256=33fff5ba71a12d2aa26cb72b1db8bba2a1a01823559fb01d29eb74c286e62e0a
   crass (1.0.6) sha256=dc516022a56e7b3b156099abc81b6d2b08ea1ed12676ac7a5657617f012bd45d
+  csv (3.3.5) sha256=6e5134ac3383ef728b7f02725d9872934f523cb40b961479f69cf3afa6c8e73f
   date (3.5.1) sha256=750d06384d7b9c15d562c76291407d89e368dda4d4fff957eb94962d325a0dc0
   debug (1.11.1) sha256=2e0b0ac6119f2207a6f8ac7d4a73ca8eb4e440f64da0a3136c30343146e952b6
   dotenv (3.2.0) sha256=e375b83121ea7ca4ce20f214740076129ab8514cd81378161f11c03853fe619d

app/controllers/items_controller.rb

@@ -4,6 +4,19 @@ class ItemsController < ApplicationController
   # GET /items or /items.json
   def index
     @items = Item.all.includes(:category, :user, :room).order(created_at: :desc)
+
+    respond_to do |format|
+    format.html # Rendert ganz normal deine Bestandsliste im Browser
+    format.csv do
+      # Dateiname generieren, z.B. "inventar_export_2026-05-22.csv"
+      filename = "inventar_export_#{Time.current.strftime('%Y-%m-%d')}.csv"
+
+      # Daten generieren und als Download an den Browser senden
+      send_data Item.to_csv,
+                filename: filename,
+                type: "text/csv; charset=utf-8; header=present"
+      end
+    end
   end
 
   # GET /items/1 or /items/1.json

app/models/item.rb

@@ -1,4 +1,5 @@
 require "rqrcode"
+require "csv"
 
 class Item < ApplicationRecord
   belongs_to :category
@@ -31,6 +32,41 @@ class Item < ApplicationRecord
     ).html_safe # Sagt Rails, dass das HTML unbedenklich ausgegeben werden darf
   end
 
+  def self.to_csv
+    # Die Spaltenüberschriften, die in der Excel-Datei erscheinen sollen
+    headers = [ "ID", "Artikelname", "SKU", "Seriennummer", "Sticker_ID", "Einkaufspreis", "Kategorie", "Aktueller_Standort", "Notizen", "Registriert_am" ]
+
+    CSV.generate(headers: true, col_sep: ";", encoding: "UTF-8") do |csv|
+      # 1. Kopfzeile schreiben
+      csv << headers
+
+      # 2. Datenzeilen schreiben (includes verhindert langsame N+1 Datenbankabfragen)
+      all.includes(:category, :user, :room).each do |item|
+        # Dynamischen Standort-Text ermitteln
+        current_location = if item.user.present?
+                            "👤 #{item.user.name}"
+        elsif item.room.present?
+                            "📍 #{item.room.name_with_building}"
+        else
+                            "📦 Im Hauptlager"
+        end
+
+        csv << [
+          item.id,
+          item.name,
+          item.sku,
+          item.serial_number,
+          item.sticker_id,
+          item.price,
+          item.category&.name,
+          current_location,
+          item.notes,
+          item.created_at.strftime("%d.%m.%Y %H:%M")
+        ]
+      end
+    end
+  end
+
   private
 
   def either_user_or_room

app/views/items/_search_bar.html.erb

@@ -16,7 +16,7 @@
       <%= link_to items_path(format: :csv), class: "py-2 px-3 border border-gray-300 rounded-lg text-sm font-medium bg-white text-gray-700 hover:bg-gray-50 flex items-center gap-1.5 transition shadow-sm", title: "Liste als Excel/CSV exportieren" do %>
         <!-- Heroicon: arrow-down-tray -->
         <svg class="h-4 w-4 text-gray-500" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" d="M3 16.5v2.25A2.25 2.25 0 0 0 5.25 21h13.5A2.25 2.25 0 0 0 21 18.75V16.5M16.5 12 12 16.5m0 0L7.5 12m4.5 4.5V3" /></svg>
-        <span>Daten exportieren</span>
+        <span>CSV</span>
       <% end %>
     <% end %>