Add and apply Style/RedundantSelf rubocop rule

.rubocop.yml

@@ -499,6 +499,9 @@ Style/RedundantParentheses:
 Style/RedundantReturn:
   Enabled: true
 
+Style/RedundantSelf:
+  Enabled: true
+
 Style/SafeNavigation:
   Enabled: true
 

app/models/admin_notification.rb

@@ -43,7 +43,7 @@ class AdminNotification < ApplicationRecord
       return unless link.present?
 
       unless link =~ /\A(http:\/\/|https:\/\/|\/)/
-        self.link = "http://#{self.link}"
+        self.link = "http://#{link}"
       end
     end
 end

app/models/budget/investment.rb

@@ -364,11 +364,11 @@ class Budget
     end
 
     def assigned_valuators
-      self.valuators.map(&:description_or_name).compact.join(", ").presence
+      valuators.map(&:description_or_name).compact.join(", ").presence
     end
 
     def assigned_valuation_groups
-      self.valuator_groups.map(&:name).compact.join(", ").presence
+      valuator_groups.map(&:name).compact.join(", ").presence
     end
 
     def self.with_milestone_status_id(status_id)

app/models/budget/phase.rb

@@ -14,8 +14,8 @@ class Budget
     include Imageable
 
     belongs_to :budget, touch: true
-    belongs_to :next_phase, class_name: self.name, inverse_of: :prev_phase
-    has_one :prev_phase, class_name: self.name, foreign_key: :next_phase_id, inverse_of: :next_phase
+    belongs_to :next_phase, class_name: name, inverse_of: :prev_phase
+    has_one :prev_phase, class_name: name, foreign_key: :next_phase_id, inverse_of: :next_phase
 
     validates_translation :name, presence: true
     validates_translation :description, length: { maximum: DESCRIPTION_MAX_LENGTH }

app/models/concerns/globalizable.rb

@@ -25,7 +25,7 @@ module Globalizable
       translated_attribute_names.any? { |attr| required_attribute?(attr) }
     end
 
-    if self.paranoid? && translation_class.attribute_names.include?("hidden_at")
+    if paranoid? && translation_class.attribute_names.include?("hidden_at")
       translation_class.send :acts_as_paranoid, column: :hidden_at
     end
 

app/models/local_census_record.rb

@@ -13,8 +13,8 @@ class LocalCensusRecord < ApplicationRecord
   private
 
     def sanitize
-      self.document_type   = self.document_type&.strip
-      self.document_number = self.document_number&.strip
-      self.postal_code     = self.postal_code&.strip
+      self.document_type   = document_type&.strip
+      self.document_number = document_number&.strip
+      self.postal_code     = postal_code&.strip
     end
 end

app/models/proposal_notification.rb

@@ -58,6 +58,6 @@ class ProposalNotification < ApplicationRecord
   private
 
     def set_author
-      self.update(author_id: self.proposal.author_id) if self.proposal
+      update(author_id: proposal.author_id) if proposal
     end
 end

app/models/related_content.rb

@@ -8,7 +8,7 @@ class RelatedContent < ApplicationRecord
   belongs_to :author, class_name: "User"
   belongs_to :parent_relationable, polymorphic: true, optional: false, touch: true
   belongs_to :child_relationable, polymorphic: true, optional: false, touch: true
-  has_one :opposite_related_content, class_name: self.name, foreign_key: :related_content_id
+  has_one :opposite_related_content, class_name: name, foreign_key: :related_content_id
   has_many :related_content_scores, dependent: :destroy
 
   validates :parent_relationable_id, uniqueness: { scope: [:parent_relationable_type, :child_relationable_id, :child_relationable_type] }

config/initializers/devise-security.rb

@@ -42,11 +42,11 @@ module Devise
   module Models
     module PasswordExpirable
       def need_change_password?
-        self.administrator? && password_expired?
+        administrator? && password_expired?
       end
 
       def password_expired?
-        self.password_changed_at < self.expire_password_after.ago
+        password_changed_at < expire_password_after.ago
       end
     end
 
@@ -60,11 +60,11 @@ module Devise
       end
 
       def current_equal_password_validation
-        if !self.new_record? && !self.encrypted_password_change.nil? && !self.erased?
+        if !new_record? && !encrypted_password_change.nil? && !erased?
           dummy = self.class.new
-          dummy.encrypted_password = self.encrypted_password_change.first
-          dummy.password_salt = self.password_salt_change.first if self.respond_to?(:password_salt_change) && !self.password_salt_change.nil?
-          self.errors.add(:password, :equal_to_current_password) if dummy.valid_password?(self.password)
+          dummy.encrypted_password = encrypted_password_change.first
+          dummy.password_salt = password_salt_change.first if respond_to?(:password_salt_change) && !password_salt_change.nil?
+          errors.add(:password, :equal_to_current_password) if dummy.valid_password?(password)
         end
       end
     end