diff --git a/.erb_lint.yml b/.erb_lint.yml
index 4bb191313..8b73dcd4d 100644
--- a/.erb_lint.yml
+++ b/.erb_lint.yml
@@ -11,6 +11,8 @@ linters:
         - .rubocop.yml
       Layout/InitialIndentation:
         Enabled: false
+      Layout/LeadingEmptyLines:
+        Enabled: false
       Layout/TrailingEmptyLines:
         Enabled: false
       Layout/TrailingWhitespace:
diff --git a/app/decorators/enclosure_decorator.rb b/app/decorators/enclosure_decorator.rb
new file mode 100644
index 000000000..467a1de95
--- /dev/null
+++ b/app/decorators/enclosure_decorator.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class EnclosureDecorator < ApplicationDecorator
+  def display_name
+    composants = object.composants.pluck(:name)
+
+    composants_sentence = if composants.empty?
+                            "0 #{Composant.model_name.human(count: 0).downcase}"
+                          else
+                            composants.map { |c| c.presence || "n/c" }.to_sentence
+                          end
+
+    "#{object.class.model_name.human} #{position} (#{composants_sentence})"
+  end
+end
diff --git a/app/models/cluster.rb b/app/models/cluster.rb
index 594791087..c1aa953dc 100644
--- a/app/models/cluster.rb
+++ b/app/models/cluster.rb
@@ -4,6 +4,7 @@ class Cluster < ApplicationRecord
   has_changelog
 
   has_many :servers, dependent: :restrict_with_error
+  has_many :cluster_rooms, dependent: :destroy
 
   scope :sorted, -> { order(Arel.sql("LOWER(name)")) }
 
diff --git a/app/models/composant.rb b/app/models/composant.rb
index 179cb81c9..cc55e8649 100644
--- a/app/models/composant.rb
+++ b/app/models/composant.rb
@@ -7,7 +7,7 @@ class Composant < ApplicationRecord
   belongs_to :enclosure
   has_one :modele, through: :enclosure
 
-  has_many :cards
+  has_many :cards, dependent: :restrict_with_error
 
   validates :name, format: { without: /\s/ }, allow_blank: true
 
diff --git a/app/models/frame.rb b/app/models/frame.rb
index 41ccc7dc4..2068a9e7a 100644
--- a/app/models/frame.rb
+++ b/app/models/frame.rb
@@ -10,11 +10,14 @@ class Frame < ApplicationRecord # rubocop:disable Metrics/ClassLength
   has_changelog
 
   belongs_to :bay
+
+  has_one :islet, through: :bay
+  has_one :room, through: :islet
+
   has_many :materials, -> { order("servers.position desc") }, class_name: "Server", dependent: :restrict_with_error
   has_many :pdus, -> { only_pdus }, class_name: "Server", dependent: :restrict_with_error
   has_many :servers, -> { no_pdus.order("servers.position desc") }, class_name: "Server", dependent: :restrict_with_error
-  has_one :islet, through: :bay
-  has_one :room, through: :islet
+
   delegate :name, to: :room, prefix: true, allow_nil: true
 
   validates :position, uniqueness: { scope: :bay_id }
diff --git a/app/models/modele.rb b/app/models/modele.rb
index aed1a560d..c822a1028 100644
--- a/app/models/modele.rb
+++ b/app/models/modele.rb
@@ -7,14 +7,15 @@ class Modele < ApplicationRecord
 
   has_changelog
 
-  has_many :servers, dependent: :restrict_with_error
-  has_many :enclosures, dependent: :restrict_with_error
-  has_many :composants, through: :enclosures
-
   belongs_to :manufacturer, counter_cache: true
   belongs_to :architecture, counter_cache: true
   belongs_to :category, counter_cache: true
 
+  has_many :servers, dependent: :restrict_with_error
+  has_many :enclosures, dependent: :destroy
+  has_many :composants, through: :enclosures
+  has_many :cards, through: :composants
+
   accepts_nested_attributes_for :enclosures,
                                 allow_destroy: true,
                                 reject_if: :all_blank
diff --git a/app/models/port_type.rb b/app/models/port_type.rb
index 3ba349040..4f220ad1c 100644
--- a/app/models/port_type.rb
+++ b/app/models/port_type.rb
@@ -3,7 +3,7 @@
 class PortType < ApplicationRecord
   has_changelog
 
-  has_many :card_types
+  has_many :card_types, dependent: :restrict_with_error
 
   scope :sorted, -> { order(name: :asc) }
 
diff --git a/app/models/server.rb b/app/models/server.rb
index 969dda200..2559b372f 100644
--- a/app/models/server.rb
+++ b/app/models/server.rb
@@ -19,7 +19,7 @@ class Server < ApplicationRecord # rubocop:disable Metrics/ClassLength
   belongs_to :modele, counter_cache: true
   has_one :manufacturer, through: :modele
 
-  has_many :cards, -> { joins(:composant).includes(:composant) }
+  has_many :cards, -> { joins(:composant).includes(:composant) }, dependent: :destroy
   has_many :card_types, through: :cards
   has_many :ports, through: :cards
   has_many :connections, through: :ports
diff --git a/app/views/clusters/destroy.html.erb b/app/views/clusters/destroy.html.erb
index b16c0ddff..eef0bf319 100644
--- a/app/views/clusters/destroy.html.erb
+++ b/app/views/clusters/destroy.html.erb
@@ -8,7 +8,8 @@
 
 <div class="col-12 p-4 border-top">
   <%= render DeleteDependencyComponent.new(
-    @cluster,
-    confirmation_path: cluster_path(@cluster, confirm: true)
-  ) %>
+        @cluster,
+        except: %i[cluster_rooms],
+        confirmation_path: cluster_path(@cluster, confirm: true),
+      ) %>
 </div>
diff --git a/app/views/rooms/destroy.html.erb b/app/views/rooms/destroy.html.erb
index 1b866abe6..349b907a0 100644
--- a/app/views/rooms/destroy.html.erb
+++ b/app/views/rooms/destroy.html.erb
@@ -8,7 +8,8 @@
 
 <div class="col-12 p-4 border-top">
   <%= render DeleteDependencyComponent.new(
-    @room,
-    confirmation_path: room_path(@room, confirm: true)
-  ) %>
+        @room,
+        except: %i[cluster_rooms],
+        confirmation_path: room_path(@room, confirm: true),
+      ) %>
 </div>
diff --git a/config/locales/activerecord.en.yml b/config/locales/activerecord.en.yml
index 363935bef..8970fcdf2 100644
--- a/config/locales/activerecord.en.yml
+++ b/config/locales/activerecord.en.yml
@@ -15,6 +15,9 @@ en:
         one: Network hub cluster
         other: Network hub clusters
       color: Color
+      composant:
+        one: Component
+        other: Components
       connection: Connection
       contact: Contact
       contact_assignment: Assignment
diff --git a/config/locales/activerecord.fr.yml b/config/locales/activerecord.fr.yml
index ac54850ea..bae8f8161 100644
--- a/config/locales/activerecord.fr.yml
+++ b/config/locales/activerecord.fr.yml
@@ -12,6 +12,9 @@ fr:
         other: Châssis
       modele: Modèle
       category: Catégorie
+      composant:
+        one: Composant
+        other: Composants
       air_conditioner: Climatisation
       air_conditioner_model: Modèle de climatisation
       architecture: Architecture
diff --git a/spec/decorators/enclosure_decorator_spec.rb b/spec/decorators/enclosure_decorator_spec.rb
new file mode 100644
index 000000000..fda834b6b
--- /dev/null
+++ b/spec/decorators/enclosure_decorator_spec.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+describe EnclosureDecorator, type: :decorator do
+  let(:object) { enclosures(:one) }
+  let(:decorated_user) { described_class.new(object) }
+
+  describe "#display_name" do
+    it { expect(decorated_user.display_name).to eq("Enclosure 1 (compo1, compo2 et SL3)") }
+
+    context "without composants" do
+      let(:object) { Enclosure.new(position: 1) }
+
+      it { expect(decorated_user.display_name).to eq("Enclosure 1 (0 composant)") }
+    end
+
+    context "with composant with empty name" do
+      let(:object) { Enclosure.new(position: 1) }
+
+      before { allow(object).to receive(:composants).and_return([Composant.new]) }
+
+      it { expect(decorated_user.display_name).to eq("Enclosure 1 (n/c)") }
+    end
+  end
+end
diff --git a/spec/models/cluster_spec.rb b/spec/models/cluster_spec.rb
index edb0f6aec..f4999a9e3 100644
--- a/spec/models/cluster_spec.rb
+++ b/spec/models/cluster_spec.rb
@@ -8,7 +8,8 @@
   it_behaves_like "changelogable", new_attributes: { name: "New name" }
 
   describe "associations" do
-    it { is_expected.to have_many(:servers) }
+    it { is_expected.to have_many(:servers).dependent(:restrict_with_error) }
+    it { is_expected.to have_many(:cluster_rooms).dependent(:destroy) }
   end
 
   describe "#to_s" do
diff --git a/spec/models/composant_spec.rb b/spec/models/composant_spec.rb
index 52ca9bebd..4a020dc68 100644
--- a/spec/models/composant_spec.rb
+++ b/spec/models/composant_spec.rb
@@ -11,7 +11,7 @@
   describe "associations" do
     it { is_expected.to belong_to(:enclosure) }
     it { is_expected.to have_one(:modele).through(:enclosure) }
-    it { is_expected.to have_many(:cards) }
+    it { is_expected.to have_many(:cards).dependent(:restrict_with_error) }
   end
 
   describe "validations" do
diff --git a/spec/models/frame_spec.rb b/spec/models/frame_spec.rb
index 855eee60b..5ee9c790c 100644
--- a/spec/models/frame_spec.rb
+++ b/spec/models/frame_spec.rb
@@ -12,9 +12,11 @@
     it { is_expected.to belong_to(:bay) }
 
     it { is_expected.to have_one(:islet).through(:bay) }
-    it { is_expected.to have_many(:materials) }
-    it { is_expected.to have_many(:pdus) }
-    it { is_expected.to have_many(:servers) }
+    it { is_expected.to have_one(:room).through(:islet) }
+
+    it { is_expected.to have_many(:materials).dependent(:restrict_with_error) }
+    it { is_expected.to have_many(:pdus).dependent(:restrict_with_error) }
+    it { is_expected.to have_many(:servers).dependent(:restrict_with_error) }
   end
 
   describe "validations" do
diff --git a/spec/models/modele_spec.rb b/spec/models/modele_spec.rb
index 0dedc2476..9981edb50 100644
--- a/spec/models/modele_spec.rb
+++ b/spec/models/modele_spec.rb
@@ -11,9 +11,11 @@
     it { is_expected.to belong_to(:manufacturer) }
     it { is_expected.to belong_to(:architecture) }
     it { is_expected.to belong_to(:category) }
-    it { is_expected.to have_many(:servers) }
-    it { is_expected.to have_many(:enclosures) }
+
+    it { is_expected.to have_many(:servers).dependent(:restrict_with_error) }
+    it { is_expected.to have_many(:enclosures).dependent(:destroy) }
     it { is_expected.to have_many(:composants).through(:enclosures) }
+    it { is_expected.to have_many(:cards).through(:composants) }
   end
 
   describe "#validate_network_types_values" do
diff --git a/spec/models/port_type_spec.rb b/spec/models/port_type_spec.rb
index 5f8bf3a6b..ac92d93b0 100644
--- a/spec/models/port_type_spec.rb
+++ b/spec/models/port_type_spec.rb
@@ -8,7 +8,7 @@
   it_behaves_like "changelogable", new_attributes: { name: "New name" }
 
   describe "associations" do
-    it { is_expected.to have_many(:card_types) }
+    it { is_expected.to have_many(:card_types).dependent(:restrict_with_error) }
   end
 
   describe "#is_power_input?" do
diff --git a/spec/models/server_spec.rb b/spec/models/server_spec.rb
index 5375838db..5a17c556c 100644
--- a/spec/models/server_spec.rb
+++ b/spec/models/server_spec.rb
@@ -22,7 +22,7 @@
     it { is_expected.to have_one(:room).through(:islet) }
     it { is_expected.to have_one(:manufacturer).through(:modele) }
 
-    it { is_expected.to have_many(:cards) }
+    it { is_expected.to have_many(:cards).dependent(:destroy) }
     it { is_expected.to have_many(:card_types).through(:cards) }
     it { is_expected.to have_many(:ports).through(:cards) }
     it { is_expected.to have_many(:connections).through(:ports) }