ruby - Simple Rails Association causing ArgumentError -

edit: this not dupe of can't migrate after scaffold in hartl's tutorial! have arel updated in gemfile in case, makes no difference. also, post-migration, rake finished fine. after rake, when try query association via console, that when error!

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i have 2 models simple one-to-many association between them. after adding second model , raking db, opened rails console test stuff out, , error every time try use association in query.

here classes:

class startup < activerecord::base   has_many :reqs end  class req < activerecord::base   belongs_to :startup end 

this migration reqs table:

class createreqs < activerecord::migration   def change     create_table :reqs |t|       t.string :title       t.text :desc       t.integer :sort       t.references :startup, index: true        t.timestamps null: false     end   end end 

and here simple test i'm trying test in console afterwards:

> startup = startup.first > startup.reqs              ## generates argumenterror > startup.reqs.build        ## generates same error 

and here beginning of error:

argumenterror: wrong number of arguments (1 0) /usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/connection_adapters/abstract_adapter.rb:271:in `initialize' /usr/local/rvm/gems/ruby-2.1.4@rails4/gems/activerecord-4.2.0.beta4/lib/active_record/connection_adapters/abstract_adapter.rb:271:in

i'm still getting hang of lot of details of ror, please hang me! thought knew, association seems basic have no idea start fixing it. help!

i think may have been sort of fluke or bug in rails. tried again morning , rails console still giving me same error. kicks tried adding model same, different name:

class createskills < activerecord::migration   def change     create_table :skills |t|       t.string :title       t.text :desc       t.integer :sort       t.references :startup, index: true        t.timestamps     end   end end 

after adding has_many skills startup.rb, went rails console , both of associations (startup.skills , startup.reqs) work fine. out of curiosity, did db:rollback , destroyed skill model , went console. startup.reqs still works fine though skill not there anymore.

i have no idea why make difference, wanted post worked me in case else runs similar issue. try generating model kind of "reset" db , can roll , may work you.