fix: Handle empty compound conditions on rules index (#965)

* fix: Handle empty compound conditions on rules index

* fix: avoid contradictory rule condition summary on /rules

* refactor: move rules condition display logic from view to model

* fix: localize rule title fallback and preload conditions in rules index

app/controllers/rules_controller.rb

@@ -11,7 +11,7 @@ class RulesController < ApplicationController
     @sort_by = "name" unless allowed_columns.include?(@sort_by)
     @direction = "asc" unless [ "asc", "desc" ].include?(@direction)
 
-    @rules = Current.family.rules.order(@sort_by => @direction)
+    @rules = Current.family.rules.includes(conditions: :sub_conditions).order(@sort_by => @direction)
 
     # Fetch recent rule runs with pagination
     recent_runs_scope = RuleRun

app/models/rule.rb

@@ -86,14 +86,23 @@ class Rule < ApplicationRecord
   end
 
   def primary_condition_title
-    return "No conditions" if conditions.none?
+    condition = displayed_condition
+    return I18n.t("rules.no_condition") if condition.blank?
 
-    first_condition = conditions.first
-    if first_condition.compound? && first_condition.sub_conditions.any?
-      first_sub_condition = first_condition.sub_conditions.first
-      "If #{first_sub_condition.filter.label.downcase} #{first_sub_condition.operator} #{first_sub_condition.value_display}"
-    else
-      "If #{first_condition.filter.label.downcase} #{first_condition.operator} #{first_condition.value_display}"
+    "If #{condition.filter.label.downcase} #{condition.operator} #{condition.value_display}"
+  end
+
+  def displayed_condition
+    displayable_conditions.first
+  end
+
+  def additional_displayable_conditions_count
+    [ displayable_conditions.size - 1, 0 ].max
+  end
+
+  def displayable_conditions
+    conditions.filter_map do |condition|
+      condition.compound? ? condition.sub_conditions.first : condition
     end
   end
 

app/views/rules/_rule.html.erb

@@ -6,20 +6,22 @@
       <h3 class="font-medium text-md"><%= rule.name %></h3>
     <% end %>
     <% if rule.conditions.any? %>
+      <% displayed_condition = rule.displayed_condition %>
+      <% additional_condition_count = rule.additional_displayable_conditions_count %>
       <div class="flex items-center gap-2 mt-1">
         <div class="flex items-center gap-1 text-secondary w-16 shrink-0">
           <span class="font-mono text-xs">IF</span>
         </div>
         <p class="flex items-center flex-wrap gap-1.5 m-0">
           <span class="px-2 py-1 border border-secondary rounded-full">
-            <% if rule.conditions.first.compound? %>
-              <%= rule.conditions.first.sub_conditions.first.filter.label %> <%= rule.conditions.first.sub_conditions.first.operator %> <%= rule.conditions.first.sub_conditions.first.value_display %>
+            <% if displayed_condition.present? %>
+              <%= displayed_condition.filter.label %> <%= displayed_condition.operator %> <%= displayed_condition.value_display %>
             <% else %>
-              <%= rule.conditions.first.filter.label %> <%= rule.conditions.first.operator %> <%= rule.conditions.first.value_display %>
+              <%= t("rules.no_condition") %>
             <% end %>
           </span>
-          <% if rule.conditions.count > 1 %>
-            and <%= rule.conditions.count - 1 %> more <%= rule.conditions.count - 1 == 1 ? "condition" : "conditions" %>
+          <% if additional_condition_count.positive? %>
+            and <%= additional_condition_count %> more <%= additional_condition_count == 1 ? "condition" : "conditions" %>
           <% end %>
         </p>
       </div>

config/locales/views/rules/ca.yml

@@ -19,6 +19,7 @@ ca:
       success: Totes les regles s'han posat a cua per a execució
       view_usage: Veure l'historial d'ús
     no_action: Sense acció
+    no_condition: Sense condició
     recent_runs:
       columns:
         date_time: Data/Hora

config/locales/views/rules/de.yml

@@ -2,6 +2,7 @@
 de:
   rules:
     no_action: Keine Aktion
+    no_condition: Keine Bedingung
     recent_runs:
       title: Letzte Ausführungen
       description: Zeige die Ausführungsgeschichte deiner Regeln einschließlich Erfolgs-/Fehlerstatus und Transaktionsanzahlen.
@@ -22,4 +23,3 @@ de:
         pending: Ausstehend
         success: Erfolgreich
         failed: Fehlgeschlagen
-

config/locales/views/rules/en.yml

@@ -2,6 +2,7 @@
 en:
   rules:
     no_action: No Action
+    no_condition: No condition
     actions:
       value_placeholder: Enter a value
     apply_all:

config/locales/views/rules/es.yml

@@ -2,6 +2,7 @@
 es:
   rules:
     no_action: Sin acción
+    no_condition: Sin condición
     recent_runs:
       title: Ejecuciones Recientes
       description: Ver el historial de ejecución de tus reglas incluyendo el estado de éxito/fallo y los conteos de transacciones.
@@ -22,4 +23,3 @@ es:
         pending: Pendiente
         success: Éxito
         failed: Fallido
-

config/locales/views/rules/fr.yml

@@ -2,6 +2,7 @@
 fr:
   rules:
     no_action: Aucune action
+    no_condition: Aucune condition
     actions:
       value_placeholder: Entrez une valeur
     apply_all:

config/locales/views/rules/nb.yml

@@ -2,6 +2,7 @@
 nb:
   rules:
     no_action: Ingen handling
+    no_condition: Ingen betingelse
     recent_runs:
       title: Siste Kjøringer
       description: Se kjøringsloggen for reglene dine inkludert suksess/feil-status og transaksjonsantall.
@@ -22,4 +23,3 @@ nb:
         pending: Ventende
         success: Vellykket
         failed: Mislyktes
-

config/locales/views/rules/nl.yml

@@ -2,6 +2,7 @@
 nl:
   rules:
     no_action: Geen actie
+    no_condition: Geen voorwaarde
     actions:
       value_placeholder: Voer een waarde in
     apply_all:

config/locales/views/rules/ro.yml

@@ -2,6 +2,7 @@
 ro:
   rules:
     no_action: Nicio acțiune
+    no_condition: Nicio condiție
     recent_runs:
       title: Rulări Recente
       description: Vezi istoricul de execuție al regulilor tale incluzând statusul de succes/eșec și numărul de tranzacții.
@@ -22,4 +23,3 @@ ro:
         pending: În Așteptare
         success: Succes
         failed: Eșuat
-

config/locales/views/rules/tr.yml

@@ -2,6 +2,7 @@
 tr:
   rules:
     no_action: İşlem yok
+    no_condition: Koşul yok
     recent_runs:
       title: Son Çalıştırmalar
       description: Başarı/başarısızlık durumu ve işlem sayıları dahil olmak üzere kurallarınızın yürütme geçmişini görüntüleyin.
@@ -22,4 +23,3 @@ tr:
         pending: Beklemede
         success: Başarılı
         failed: Başarısız
-

config/locales/views/rules/zh-CN.yml

@@ -2,6 +2,7 @@
 zh-CN:
   rules:
     no_action: 无操作
+    no_condition: 无条件
     recent_runs:
       columns:
         date_time: 日期/时间

config/locales/views/rules/zh-TW.yml

@@ -2,6 +2,7 @@
 zh-TW:
   rules:
     no_action: 無動作
+    no_condition: 無條件
     recent_runs:
       title: 最近執行紀錄
       description: 查看規則的執行歷史，包括成功/失敗狀態以及交易處理筆數。

test/controllers/rules_controller_test.rb

@@ -180,6 +180,36 @@ class RulesControllerTest < ActionDispatch::IntegrationTest
     assert_redirected_to rules_url
   end
 
+  test "index renders when rule has empty compound condition" do
+    malformed_rule = @user.family.rules.build(resource_type: "transaction")
+    malformed_rule.conditions.build(condition_type: "compound", operator: "and")
+    malformed_rule.actions.build(action_type: "exclude_transaction")
+    malformed_rule.save!
+
+    get rules_url
+
+    assert_response :success
+    assert_includes response.body, I18n.t("rules.no_condition")
+  end
+
+  test "index uses next valid condition when first compound condition is empty" do
+    rule = @user.family.rules.build(resource_type: "transaction")
+    rule.conditions.build(condition_type: "compound", operator: "and")
+    rule.conditions.build(condition_type: "transaction_name", operator: "like", value: "edge-case-name")
+    rule.actions.build(action_type: "exclude_transaction")
+    rule.save!
+
+    get rules_url
+
+    assert_response :success
+
+    assert_select "##{ActionView::RecordIdentifier.dom_id(rule)}" do
+      assert_select "span", text: /edge-case-name/
+      assert_select "span", text: /#{Regexp.escape(I18n.t("rules.no_condition"))}/, count: 0
+      assert_select "p", text: /and 1 more condition/, count: 0
+    end
+  end
+
   test "should get confirm_all" do
     get confirm_all_rules_url
     assert_response :success

test/models/rule_test.rb

@@ -138,6 +138,40 @@ class RuleTest < ActiveSupport::TestCase
     assert_equal [ "Compound conditions cannot be nested" ], rule.errors.full_messages
   end
 
+  test "displayed_condition falls back to next valid condition when first compound condition is empty" do
+    rule = Rule.new(
+      family: @family,
+      resource_type: "transaction",
+      actions: [ Rule::Action.new(action_type: "exclude_transaction") ],
+      conditions: [
+        Rule::Condition.new(condition_type: "compound", operator: "and"),
+        Rule::Condition.new(condition_type: "transaction_name", operator: "like", value: "starbucks")
+      ]
+    )
+
+    displayed_condition = rule.displayed_condition
+
+    assert_not_nil displayed_condition
+    assert_equal "transaction_name", displayed_condition.condition_type
+    assert_equal "like", displayed_condition.operator
+    assert_equal "starbucks", displayed_condition.value
+  end
+
+  test "additional_displayable_conditions_count ignores empty compound conditions" do
+    rule = Rule.new(
+      family: @family,
+      resource_type: "transaction",
+      actions: [ Rule::Action.new(action_type: "exclude_transaction") ],
+      conditions: [
+        Rule::Condition.new(condition_type: "compound", operator: "and"),
+        Rule::Condition.new(condition_type: "transaction_name", operator: "like", value: "first"),
+        Rule::Condition.new(condition_type: "transaction_amount", operator: ">", value: 100)
+      ]
+    )
+
+    assert_equal 1, rule.additional_displayable_conditions_count
+  end
+
   test "rule matching on transaction details" do
     # Create PayPal transaction with underlying merchant in details
     paypal_entry = create_transaction(