Return just the address if name is blank

Otherwise the returned string would look like " <[email protected]>".

Author: thutterer

actionmailer/CHANGELOG.md

@@ -1,3 +1,8 @@
+*   `email_address_with_name` returns just the address if name is blank.
+
+    *Thomas Hutterer*
+
+
 ## Rails 7.0.0.alpha2 (September 15, 2021) ##
 
 *   No changes.

actionmailer/lib/action_mailer/base.rb

@@ -563,10 +563,12 @@ def deliver_mail(mail) # :nodoc:
       end
 
       # Returns an email in the format "Name <[email protected]>".
+      #
+      # If the name is a blank string, it returns just the address.
       def email_address_with_name(address, name)
         Mail::Address.new.tap do |builder|
           builder.address = address
-          builder.display_name = name
+          builder.display_name = name.presence
         end.to_s
       end
 
@@ -638,6 +640,8 @@ def mailer_name
     end
 
     # Returns an email in the format "Name <[email protected]>".
+    #
+    # If the name is a blank string, it returns just the address.
     def email_address_with_name(address, name)
       self.class.email_address_with_name(address, name)
     end

actionmailer/test/base_test.rb

@@ -89,6 +89,11 @@ class BaseTest < ActiveSupport::TestCase
     assert_equal("Mikel <[email protected]>", email["Reply-To"].value)
   end
 
+  test "mail() using email_address_with_name with blank string as name" do
+    email = BaseMailer.with_blank_name
+    assert_equal("[email protected]", email["To"].value)
+  end
+
   # Custom headers
   test "custom headers" do
     email = BaseMailer.welcome

actionmailer/test/mailers/base_mailer.rb

@@ -31,6 +31,11 @@ def with_name
     mail(template_name: "welcome", to: to)
   end
 
+  def with_blank_name
+    to = email_address_with_name("[email protected]", "")
+    mail(template_name: "welcome", to: to)
+  end
+
   def html_only(hash = {})
     mail(hash)
   end

guides/source/action_mailer_basics.md

@@ -390,6 +390,8 @@ def welcome_email
 end
 ```
 
+If the name is a blank string, it returns just the address.
+
 [`email_address_with_name`]: https://api.rubyonrails.org/classes/ActionMailer/Base.html#method-i-email_address_with_name
 
 ### Mailer Views