pg, `change_column_default` accepts `[]`. Closes #11586.

1 files changed, 9 insertions, 1 deletions

diff --git a/activerecord/test/cases/adapters/postgresql/array_test.rb b/activerecord/test/cases/adapters/postgresql/array_test.rb
index 18dd4a6de8..d7d536c79d 100644
--- a/activerecord/test/cases/adapters/postgresql/array_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/array_test.rb
@@ -61,7 +61,7 @@ class PostgresqlArrayTest < ActiveRecord::TestCase
 
   def test_change_column_with_array
     @connection.add_column :pg_arrays, :snippets, :string, array: true, default: []
-    @connection.change_column :pg_arrays, :snippets, :text, array: true, default: "{}"
+    @connection.change_column :pg_arrays, :snippets, :text, array: true, default: []
 
     PgArray.reset_column_information
     column = PgArray.columns.find { |c| c.name == 'snippets' }
@@ -80,6 +80,14 @@ class PostgresqlArrayTest < ActiveRecord::TestCase
     end
   end
 
+  def test_change_column_default_with_array
+    @connection.change_column_default :pg_arrays, :tags, []
+
+    PgArray.reset_column_information
+    column = PgArray.columns_hash['tags']
+    assert_equal [], column.default
+  end
+
   def test_type_cast_array
     data = '{1,2,3}'
     oid_type  = @column.instance_variable_get('@oid_type').subtype