# Wrong number of arguments (1 for 0) **URL:** \ **Category:** Rails\ **Created:** [June 4, 2009, 11:34am UTC](https://www.ruby-forum.com/t/wrong-number-of-arguments-1-for-0/169485 "2009-06-04T11:34:33Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![springbok](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@springbok](https://www.ruby-forum.com/u/springbok)\ **Post date:** [June 4, 2009, 11:34am UTC](https://www.ruby-forum.com/t/wrong-number-of-arguments-1-for-0/169485/1 "2009-06-04T11:34:33Z")
Hi, I hope someone can help me because this is driving me crazy, I’ve spent hours trying to track this down. I’m trying to convert a Rails 1.1 to Rails 2.3.2 and I’m getting the following error when trying to save a many to many relationship. I’ve double checked all the associations, I’ve used console to test my models and they all work ok, I can do manually what I’m trying to do with Rails. There is something in the code somewhere outside of the model code that is causing this problem and I’m at a loss to track it down. I’ve traced into the code for has\_many\_associations.rb: ``` def insert_record(record, force = false, validate = true) set_belongs_to_association_for(record) force ? record.save! : record.save(validate) end ``` and it blows up on the force ? record.save! : record.save(validate) line. Here is the stack trace: wrong number of arguments (1 for 0) RAILS\_ROOT: /var/www/rails/dropzone Application Trace | Framework Trace | Full Trace /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ associations/has\_many\_association.rb:61:in `save' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ associations/has_many_association.rb:61:in`insert\_record’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ associations/association\_proxy.rb:145:in `send' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ associations/association_proxy.rb:145:in`send’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ autosave\_association.rb:291:in `save_collection_association' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ autosave_association.rb:284:in`each’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ autosave\_association.rb:284:in `save_collection_association' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ autosave_association.rb:168:in`autosave\_associated\_records\_for\_booking\_options’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active\_support/ callbacks.rb:180:in `evaluate_method' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/ callbacks.rb:180:in`evaluate\_method’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active\_support/ callbacks.rb:180:in `instance_eval' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/ callbacks.rb:180:in`evaluate\_method’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active\_support/ callbacks.rb:166:in `call' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/ callbacks.rb:93:in`run’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active\_support/ callbacks.rb:92:in `each' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/ callbacks.rb:92:in`send’ /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active\_support/ callbacks.rb:92:in `run' /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/ callbacks.rb:276:in`run\_callbacks’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ callbacks.rb:344:in `callback' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ callbacks.rb:283:in`update’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ base.rb:2868:in `create_or_update_without_callbacks' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ callbacks.rb:250:in`create\_or\_update’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ base.rb:2556:in `save_without_validation!' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ validations.rb:1019:in`save\_without\_dirty!’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ dirty.rb:87:in `save_without_transactions!' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ transactions.rb:200:in`save\_\_without\_trace\_ActiveRecord\_\_\_self\_class\_name\_\_save’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ connection\_adapters/abstract/database\_statements.rb:136:in `transaction' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ transactions.rb:182:in`transaction’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ transactions.rb:200:in `save __without_trace_ActiveRecord___ self_class_name__save' /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/ transactions.rb:208:in`rollback\_active\_record\_state!’ /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active\_record/ transactions.rb:200:in `save __without_trace_ActiveRecord___ self_class_name__save' /var/www/rails/dropzone/vendor/plugins/newrelic_rpm/lib/new_relic/ agent/method_tracer.rb:138:in`save\_\_without\_trace\_ActiveRecord\_save’ /var/www/rails/dropzone/vendor/plugins/newrelic\_rpm/lib/new\_relic/ agent/method\_tracer.rb:41:in `trace_method_execution_with_scope' /var/www/rails/dropzone/vendor/plugins/newrelic_rpm/lib/new_relic/ agent/method_tracer.rb:137:in`save\_\_without\_trace\_ActiveRecord\_save’ /var/www/rails/dropzone/vendor/plugins/newrelic\_rpm/lib/new\_relic/ agent/method\_tracer.rb:141:in `save__without_trace_ActiveRecord_all' /var/www/rails/dropzone/vendor/plugins/newrelic_rpm/lib/new_relic/ agent/method_tracer.rb:141:in`save!’ /var/www/rails/dropzone/app/controllers/bookings\_controller.rb:137:in `update’ Any help appreciated, any suggestions on how to track down what is causing the problem would also be appreciated. Thanks. ---
**Author:** ![springbok](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@springbok](https://www.ruby-forum.com/u/springbok)\ **Post date:** [June 4, 2009, 12:26pm UTC](https://www.ruby-forum.com/t/wrong-number-of-arguments-1-for-0/169485/2 "2009-06-04T12:26:20Z")
On Jun 4, 10:33 am, springbok [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Have you (or a plugin) overwritten a core method somewhere ? Fred