Generate indexed names in input even when objects are not persisted

When you ask to generate multiple nested inputs using:

    field_for('comments[]', Comment.new) do |c|
      c.text_field :body

Rails should generated the names like `post[comments][][body]`.

To make sure we don't have regression the fake models now use the same
implementation of `#to_param` as `ActiveRecord::Base`

Fixes #26942

1 files changed, 4 insertions, 4 deletions

diff --git a/actionview/test/lib/controller/fake_models.rb b/actionview/test/lib/controller/fake_models.rb
index 80649db88b..ddc915895d 100644
--- a/actionview/test/lib/controller/fake_models.rb
+++ b/actionview/test/lib/controller/fake_models.rb
@@ -80,7 +80,7 @@ class Comment
   def to_key; id ? [id] : nil end
   def save; @id = 1; @post_id = 1 end
   def persisted?; @id.present? end
-  def to_param; @id.to_s; end
+  def to_param; @id && @id.to_s; end
   def name
     @id.nil? ? "new #{self.class.name.downcase}" : "#{self.class.name.downcase} ##{@id}"
   end
@@ -101,7 +101,7 @@ class Tag
   def to_key; id ? [id] : nil end
   def save; @id = 1; @post_id = 1 end
   def persisted?; @id.present? end
-  def to_param; @id; end
+  def to_param; @id && @id.to_s; end
   def value
     @id.nil? ? "new #{self.class.name.downcase}" : "#{self.class.name.downcase} ##{@id}"
   end
@@ -120,7 +120,7 @@ class CommentRelevance
   def to_key; id ? [id] : nil end
   def save; @id = 1; @comment_id = 1 end
   def persisted?; @id.present? end
-  def to_param; @id; end
+  def to_param; @id && @id.to_s; end
   def value
     @id.nil? ? "new #{self.class.name.downcase}" : "#{self.class.name.downcase} ##{@id}"
   end
@@ -136,7 +136,7 @@ class TagRelevance
   def to_key; id ? [id] : nil end
   def save; @id = 1; @tag_id = 1 end
   def persisted?; @id.present? end
-  def to_param; @id; end
+  def to_param; @id && @id.to_s; end
   def value
     @id.nil? ? "new #{self.class.name.downcase}" : "#{self.class.name.downcase} ##{@id}"
   end