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-rw-r--r--actionview/CHANGELOG.md6
-rw-r--r--actionview/lib/action_view/template.rb2
-rw-r--r--actionview/test/fixtures/test/render_file_instance_variable.erb1
-rw-r--r--actionview/test/template/compiled_templates_test.rb4
4 files changed, 12 insertions, 1 deletions
diff --git a/actionview/CHANGELOG.md b/actionview/CHANGELOG.md
index 59afed1f98..c12fb2e5ae 100644
--- a/actionview/CHANGELOG.md
+++ b/actionview/CHANGELOG.md
@@ -1,3 +1,9 @@
+* Allow render locals to be assigned to instance variables in a view.
+
+ Fixes #27480.
+
+ *Andrew White*
+
* Add `check_parameters` option to `current_page?` which makes it more strict.
*Maksym Pugach*
diff --git a/actionview/lib/action_view/template.rb b/actionview/lib/action_view/template.rb
index 4b793c3b16..c067031d2d 100644
--- a/actionview/lib/action_view/template.rb
+++ b/actionview/lib/action_view/template.rb
@@ -326,7 +326,7 @@ module ActionView
# Only locals with valid variable names get set directly. Others will
# still be available in local_assigns.
locals = @locals - Module::RUBY_RESERVED_KEYWORDS
- locals = locals.grep(/\A(?![A-Z0-9])(?:[[:alnum:]_]|[^\0-\177])+\z/)
+ locals = locals.grep(/\A@?(?![A-Z0-9])(?:[[:alnum:]_]|[^\0-\177])+\z/)
# Double assign to suppress the dreaded 'assigned but unused variable' warning
locals.each_with_object("") { |key, code| code << "#{key} = #{key} = local_assigns[:#{key}];" }
diff --git a/actionview/test/fixtures/test/render_file_instance_variable.erb b/actionview/test/fixtures/test/render_file_instance_variable.erb
new file mode 100644
index 0000000000..5344ac8a66
--- /dev/null
+++ b/actionview/test/fixtures/test/render_file_instance_variable.erb
@@ -0,0 +1 @@
+<%= @foo %> \ No newline at end of file
diff --git a/actionview/test/template/compiled_templates_test.rb b/actionview/test/template/compiled_templates_test.rb
index 40ac867b38..adb2be9be4 100644
--- a/actionview/test/template/compiled_templates_test.rb
+++ b/actionview/test/template/compiled_templates_test.rb
@@ -38,6 +38,10 @@ class CompiledTemplatesTest < ActiveSupport::TestCase
assert_equal "🎂", render(file: "test/render_file_unicode_local", locals: { 🎃: "🎂" })
end
+ def test_template_with_instance_variable_identifier
+ assert_equal "bar", render(file: "test/render_file_instance_variable", locals: { "@foo": "bar" })
+ end
+
def test_template_gets_recompiled_when_using_different_keys_in_local_assigns
assert_equal "one", render(file: "test/render_file_with_locals_and_default")
assert_equal "two", render(file: "test/render_file_with_locals_and_default", locals: { secret: "two" })