Improve validation of Account#public_name, #biography

app/models/account.rb

@@ -50,6 +50,8 @@ class Account < ApplicationRecord
 
   after_initialize :generate_username
 
+  before_validation :turn_blanks_into_nils
+
   before_create :generate_guest_token
 
   ###############
@@ -64,11 +66,6 @@ class Account < ApplicationRecord
             format:     USERNAME_RE,
             uniqueness: { case_sensitive: false }
 
-  validates :public_name,
-            allow_nil:   true,
-            allow_blank: false,
-            presence:    true
-
   validates :biography, length: { maximum: 10_000 }
 
   ###########
@@ -119,4 +116,9 @@ private
   def generate_guest_token
     self.guest_token = SecureRandom.hex
   end
+
+  def turn_blanks_into_nils
+    self.public_name = nil if public_name.blank?
+    self.biography   = nil if biography.blank?
+  end
 end

spec/models/account_spec.rb

@@ -96,18 +96,42 @@ RSpec.describe Account do
     end
 
     it { is_expected.to allow_value nil }
-
+    it { is_expected.to allow_value '' }
-    it { is_expected.not_to allow_value '' }
+    it { is_expected.to allow_value ' ' }
-    it { is_expected.not_to allow_value ' ' }
 
     it { is_expected.to allow_value Faker::Name.name }
     it { is_expected.to allow_value Faker::Name.first_name }
     it { is_expected.to allow_value 'Foo Bar' }
+
+    context 'when it was set to blank value' do
+      subject { create :personal_account, public_name: ' ' * rand(100) }
+
+      specify do
+        expect(subject.public_name).to eq nil
+      end
+    end
   end
 
   describe '#biography' do
-    it { is_expected.not_to validate_presence_of :biography }
+    def allow_value(*)
+      super.for :biography
+    end
+
     it { is_expected.to validate_length_of(:biography).is_at_most(10_000) }
+
+    it { is_expected.to allow_value nil }
+    it { is_expected.to allow_value '' }
+    it { is_expected.to allow_value ' ' }
+
+    it { is_expected.to allow_value Faker::Lorem.sentence }
+
+    context 'when it was set to blank value' do
+      subject { create :personal_account, biography: ' ' * rand(100) }
+
+      specify do
+        expect(subject.biography).to eq nil
+      end
+    end
   end
 
   describe '#has_role?' do