Added some models

User
Item
Department
Categorie
AssignmentLog
Room

app/models/assignment_log.rb

@@ -0,0 +1,7 @@
+class AssignmentLog < ApplicationRecord
+  belongs_to :item
+  belongs_to :user, optional: true
+  belongs_to :room, optional: true
+
+  validates :assigned_at, presence: true
+end

app/models/assignment_log2.rb

@@ -0,0 +1,5 @@
+class AssignmentLog2 < ApplicationRecord
+  belongs_to :item
+  belongs_to :user
+  belongs_to :room
+end

app/models/category.rb

@@ -0,0 +1,2 @@
+class Category < ApplicationRecord
+end

app/models/department.rb

@@ -0,0 +1,6 @@
+class Department < ApplicationRecord
+  has_many :users, dependent: :nullify
+  has_many :items, through: :users
+
+  validates :name, presence: true, uniqueness: true
+end

app/models/item.rb

@@ -0,0 +1,36 @@
+class Item < ApplicationRecord
+  belongs_to :category
+  belongs_to :user, optional: true # Optional, falls im Raum oder Lager
+  belongs_to :room, optional: true # Optional, falls beim User oder Lager
+  has_many :assignment_logs, dependent: :destroy
+
+  validates :name, :sku, presence: true
+  validates :sticker_id, :serial_number, presence: true, uniqueness: true
+
+  # Validierung: Darf nicht gleichzeitig einem User UND einem Raum gehören
+  validate :either_user_or_room
+
+  # Überwacht Besitzer- oder Raumwechsel für die Historie
+  before_save :track_assignment_changes, if: -> { will_save_change_to_user_id? || will_save_change_to_room_id? }
+
+  private
+
+  def either_user_or_room
+    if user_id.present? && room_id.present?
+      errors.add(:base, "Ein Artikel kann nicht gleichzeitig einem Benutzer und einem Raum zugewiesen sein.")
+    end
+  end
+
+  def track_assignment_changes
+    # 1. Altes Log-Buch schließen, falls es eine vorherige Zuweisung gab
+    if user_id_was.present? || room_id_was.present?
+      last_log = assignment_logs.find_by(user_id: user_id_was, room_id: room_id_was, returned_at: nil)
+      last_log&.update(returned_at: Time.current)
+    end
+
+    # 2. Neues Log-Buch öffnen für den neuen Inhaber oder den neuen Raum
+    if user_id.present? || room_id.present?
+      assignment_logs.build(user_id: user_id, room_id: room_id, assigned_at: Time.current)
+    end
+  end
+end

app/models/room.rb

@@ -0,0 +1,11 @@
+class Room < ApplicationRecord
+  has_many :items, dependent: :nullify
+  has_many :assignment_logs, dependent: :destroy
+  
+  validates :name, presence: true, uniqueness: true
+
+  # Für das Raum-Auswahlfeld im Formular
+  def name_with_building
+    building.present? ? "#{name} (Gebäude #{building})" : name
+  end
+end

app/models/user.rb

@@ -10,13 +10,18 @@ class User < ApplicationRecord
     password_salt.last(10)
   end
 
-
   has_many :sessions, dependent: :destroy
   has_many :events, dependent: :destroy
 
   validates :email, presence: true, uniqueness: true, format: { with: URI::MailTo::EMAIL_REGEXP }
   validates :password, allow_nil: true, length: { minimum: @@min_length_password }
 
+  belongs_to :department, optional: true
+  has_many :items, dependent: :nullify
+  has_many :assignment_logs, dependent: :destroy
+
+  validates :first_name, :last_name, presence: true, on: :update
+
   normalizes :email, with: -> { _1.strip.downcase }
 
   before_validation if: :email_changed?, on: :update do
@@ -39,6 +44,20 @@ class User < ApplicationRecord
     events.create! action: "email_verified"
   end
 
+    # Gibt den vollen Namen zurück
+  def name
+    if first_name.present? && last_name.present?
+      "#{first_name} #{last_name}"
+    else
+      email
+    end
+  end
+
+  # Für das Besitzer-Auswahlfeld im Formular
+  def name_with_department
+    department.present? ? "#{name} (#{department.name})" : name
+  end
+
   def self.min_length_password
     @@min_length_password
   end

db/migrate/20260521120102_create_categories.rb

@@ -0,0 +1,10 @@
+class CreateCategories < ActiveRecord::Migration[8.1]
+  def change
+    create_table :categories do |t|
+      t.string :name
+      t.text :description
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20260521121137_create_departments.rb

@@ -0,0 +1,10 @@
+class CreateDepartments < ActiveRecord::Migration[8.1]
+  def change
+    create_table :departments do |t|
+      t.string :name
+      t.string :code
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20260521124041_create_items.rb

@@ -0,0 +1,19 @@
+class CreateItems < ActiveRecord::Migration[8.1]
+  def change
+    create_table :items do |t|
+      t.string :name
+      t.string :sku
+      t.string :sticker_id
+      t.string :serial_number
+      t.decimal :price, precision: 8, scale: 2
+      t.text :notes
+      t.references :category, foreign_key: true
+      t.references :user, foreign_key: true
+      t.references :room, foreign_key: true
+
+      t.timestamps
+    end
+    add_index :items, :sticker_id, unique: true
+    add_index :items, :serial_number, unique: true
+  end
+end

db/migrate/20260521124606_create_assignment_logs.rb

@@ -0,0 +1,13 @@
+class CreateAssignmentLogs < ActiveRecord::Migration[8.1]
+  def change
+    create_table :assignment_logs do |t|
+      t.references :item, foreign_key: true
+      t.references :user, foreign_key: true
+      t.references :room, foreign_key: true
+      t.datetime :assigned_at
+      t.datetime :returned_at
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20260521124755_add_details_to_users.rb

@@ -0,0 +1,9 @@
+class AddDetailsToUsers < ActiveRecord::Migration[7.1]
+  def change
+    add_column :users, :first_name, :string
+    add_column :users, :last_name, :string
+    
+    # WICHTIG: null: true erlaubt es, dass alte User erst einmal ohne Abteilung migriert werden
+    add_reference :users, :department, null: true, foreign_key: true
+  end
+end

db/migrate/20260521125254_create_rooms.rb

@@ -0,0 +1,11 @@
+class CreateRooms < ActiveRecord::Migration[8.1]
+  def change
+    create_table :rooms do |t|
+      t.string :name
+      t.string :building
+      t.string :floor
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,34 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.1].define(version: 2026_05_20_205436) do
+ActiveRecord::Schema[8.1].define(version: 2026_05_21_125254) do
+  create_table "assignment_logs", force: :cascade do |t|
+    t.datetime "assigned_at"
+    t.datetime "created_at", null: false
+    t.integer "item_id"
+    t.datetime "returned_at"
+    t.integer "room_id"
+    t.datetime "updated_at", null: false
+    t.integer "user_id"
+    t.index ["item_id"], name: "index_assignment_logs_on_item_id"
+    t.index ["room_id"], name: "index_assignment_logs_on_room_id"
+    t.index ["user_id"], name: "index_assignment_logs_on_user_id"
+  end
+
+  create_table "categories", force: :cascade do |t|
+    t.datetime "created_at", null: false
+    t.text "description"
+    t.string "name"
+    t.datetime "updated_at", null: false
+  end
+
+  create_table "departments", force: :cascade do |t|
+    t.string "code"
+    t.datetime "created_at", null: false
+    t.string "name"
+    t.datetime "updated_at", null: false
+  end
+
   create_table "events", force: :cascade do |t|
     t.string "action", null: false
     t.datetime "created_at", null: false
@@ -21,6 +48,33 @@ ActiveRecord::Schema[8.1].define(version: 2026_05_20_205436) do
     t.index ["user_id"], name: "index_events_on_user_id"
   end
 
+  create_table "items", force: :cascade do |t|
+    t.integer "category_id"
+    t.datetime "created_at", null: false
+    t.string "name"
+    t.text "notes"
+    t.decimal "price", precision: 8, scale: 2
+    t.integer "room_id"
+    t.string "serial_number"
+    t.string "sku"
+    t.string "sticker_id"
+    t.datetime "updated_at", null: false
+    t.integer "user_id"
+    t.index ["category_id"], name: "index_items_on_category_id"
+    t.index ["room_id"], name: "index_items_on_room_id"
+    t.index ["serial_number"], name: "index_items_on_serial_number", unique: true
+    t.index ["sticker_id"], name: "index_items_on_sticker_id", unique: true
+    t.index ["user_id"], name: "index_items_on_user_id"
+  end
+
+  create_table "rooms", force: :cascade do |t|
+    t.string "building"
+    t.datetime "created_at", null: false
+    t.string "floor"
+    t.string "name"
+    t.datetime "updated_at", null: false
+  end
+
   create_table "sessions", force: :cascade do |t|
     t.datetime "created_at", null: false
     t.string "ip_address"
@@ -32,13 +86,24 @@ ActiveRecord::Schema[8.1].define(version: 2026_05_20_205436) do
 
   create_table "users", force: :cascade do |t|
     t.datetime "created_at", null: false
+    t.integer "department_id"
     t.string "email", null: false
+    t.string "first_name"
+    t.string "last_name"
     t.string "password_digest", null: false
     t.datetime "updated_at", null: false
     t.boolean "verified", default: false, null: false
+    t.index ["department_id"], name: "index_users_on_department_id"
     t.index ["email"], name: "index_users_on_email", unique: true
   end
 
+  add_foreign_key "assignment_logs", "items"
+  add_foreign_key "assignment_logs", "rooms"
+  add_foreign_key "assignment_logs", "users"
   add_foreign_key "events", "users"
+  add_foreign_key "items", "categories"
+  add_foreign_key "items", "rooms"
+  add_foreign_key "items", "users"
   add_foreign_key "sessions", "users"
+  add_foreign_key "users", "departments"
 end

db/seeds.rb

@@ -7,3 +7,41 @@
 #   ["Action", "Comedy", "Drama", "Horror"].each do |genre_name|
 #     MovieGenre.find_or_create_by!(name: genre_name)
 #   end
+puts "Bereinige Datenbank..."
+AssignmentLog.destroy_all
+Item.destroy_all
+Room.destroy_all
+User.destroy_all
+Department.destroy_all
+Category.destroy_all
+
+puts "Erstelle Abteilungen..."
+dept_it = Department.create!(name: "IT & Infrastruktur", code: "IT")
+dept_mkt = Department.create!(name: "Marketing", code: "MKT")
+
+puts "Erstelle Benutzer..."
+u1 = User.create!(first_name: "Max", last_name: "Mustermann", email: "max@firma.de", password: "password123123", department: dept_it)
+u2 = User.create!(first_name: "Erika", last_name: "Mustermann", email: "erika@firma.de", password: "password123123", department: dept_mkt)
+
+puts "Erstelle Kategorien..."
+cat_hardware = Category.create!(name: "Hardware", description: "Laptops und Monitore")
+cat_furniture = Category.create!(name: "Möbel", description: "Tische und Stühle")
+
+puts "Erstelle Räume..."
+room_101 = Room.create!(name: "Raum 101", building: "Hauptgebäude", floor: "1. OG")
+room_lab = Room.create!(name: "Technik-Labor", building: "Werkstatt", floor: "EG")
+
+puts "Erstelle Artikel..."
+# Artikel fest an User vergeben
+item_laptop = Item.create!(
+  name: "MacBook Pro 16\"", sku: "MBP16-M3", sticker_id: "10001", serial_number: "C02F1234XYZ",
+  price: 2500.00, notes: "Entwickler-Laptop", category: cat_hardware, user: u1
+)
+
+# Artikel fest an einen Raum vergeben
+item_monitor = Item.create!(
+  name: "Dell 27\" Monitor", sku: "DELL-U27", sticker_id: "10002", serial_number: "CN-0708XX",
+  price: 450.00, notes: "Fest verbaut an der Wand", category: cat_hardware, room: room_101
+)
+
+puts "🎉 Datenbank erfolgreich aufgesetzt!"

test/fixtures/assignment_log2s.yml

@@ -0,0 +1,15 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  item: one
+  user: one
+  room: one
+  assigned_at: 2026-05-21 15:29:43
+  returned_at: 2026-05-21 15:29:43
+
+two:
+  item: two
+  user: two
+  room: two
+  assigned_at: 2026-05-21 15:29:43
+  returned_at: 2026-05-21 15:29:43

test/fixtures/assignment_logs.yml

@@ -0,0 +1,15 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  item: one
+  user: one
+  room: one
+  assigned_at: 2026-05-21 14:46:06
+  returned_at: 2026-05-21 14:46:06
+
+two:
+  item: two
+  user: two
+  room: two
+  assigned_at: 2026-05-21 14:46:06
+  returned_at: 2026-05-21 14:46:06

test/fixtures/categories.yml

@@ -0,0 +1,9 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  name: MyString
+  description: MyText
+
+two:
+  name: MyString
+  description: MyText

test/fixtures/departments.yml

@@ -0,0 +1,9 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  name: MyString
+  code: MyString
+
+two:
+  name: MyString
+  code: MyString

test/fixtures/items.yml

@@ -0,0 +1,23 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  name: MyString
+  serial_number: MyString
+  sku: MyString
+  sticker_id: MyString
+  price: 9.99
+  notes: MyText
+  category: one
+  user: one
+  room: one
+
+two:
+  name: MyString
+  serial_number: MyString
+  sku: MyString
+  sticker_id: MyString
+  price: 9.99
+  notes: MyText
+  category: two
+  user: two
+  room: two

test/fixtures/rooms.yml

@@ -0,0 +1,11 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  name: MyString
+  building: MyString
+  floor: MyString
+
+two:
+  name: MyString
+  building: MyString
+  floor: MyString

test/models/assignment_log2_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class AssignmentLog2Test < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/models/assignment_log_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class AssignmentLogTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/models/category_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class CategoryTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/models/department_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class DepartmentTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/models/item_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class ItemTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end

test/models/room_test.rb

@@ -0,0 +1,7 @@
+require "test_helper"
+
+class RoomTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end