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-rw-r--r--activerecord/lib/active_record/database_configurations.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/database_configurations.rb b/activerecord/lib/active_record/database_configurations.rb
index a6c702cbbc..4656045fe5 100644
--- a/activerecord/lib/active_record/database_configurations.rb
+++ b/activerecord/lib/active_record/database_configurations.rb
@@ -106,7 +106,7 @@ module ActiveRecord
build_db_config = configs.each_pair.flat_map do |env_name, config|
walk_configs(env_name.to_s, "primary", config)
- end.compact
+ end.flatten.compact
if url = ENV["DATABASE_URL"]
build_url_config(url, build_db_config)