ruby on rails - FactoryGirl - can't write unknown attribute, and undefined method `name' -

i'm trying create photo factory that's in many 1 association gallery. , i'm getting 2 errors, depending on how specify association between 2 models.

here's models:

photo

belongs_to :gallery, class_name: "sevengallery::gallery" 

gallery

has_many :photos, class_name: "sevengallery::photo", foreign_key: "seven_gallery_gallery_id", dependent: :destroy 

and migrations

create_table :seven_gallery_galleries |t|  t.string :title      t.timestamps null: false end  create_table :seven_gallery_photos |t|    t.string :caption    t.string :image    t.references :seven_gallery_gallery, index: true    t.timestamps null: false  end   add_foreign_key :seven_gallery_photos, :seven_gallery_galleries, on_delete: :cascade 

now here's factories: gallery:

factorygirl.define   factory :gallery, class: 'sevengallery::gallery'     title "an event gallery"     factory :gallery_with_photos          after(:build) |gallery|              gallery.photos << factorygirl.create(:photo_one, seven_gallery_gallery_id: gallery)             gallery.photos << factorygirl.create(:photo_two, seven_gallery_gallery_id: gallery)             gallery.photos << factorygirl.create(:photo_three, seven_gallery_gallery_id: gallery)         end     end   end end 

and photo:

factorygirl.define   factory :photo, class: "sevengallery::photo"        factory :photo_one       end        factory :photo_two       end        factory :photo_three       end        factory :photo_with_gallery         gallery        end   end end 

and here's controller spec generates error:

it "changes is_main true in self , false in rest"     photo_one = factorygirl.create(:photo_with_gallery)     expect(photo_one.gallery).to be_a sevengallery::gallery end 

whenever run test error:

failure/error: photo_one = factorygirl.create(:photo_with_gallery)      activemodel::missingattributeerror:        can't write unknown attribute `gallery_id`      # ./spec/controllers/seven_gallery/photos_controller_spec.rb: 

when change association part be:

factory :photo_with_gallery   association :gallery, factory: gallery     end 

i error:

failure/error: photo_one = factorygirl.create(:photo_with_gallery)   nomethoderror:      undefined method `name' :photo_with_gallery:symbol     # ./spec/controllers/seven_gallery/photos_controller_spec.rb:8 

schema.rb

activerecord::schema.define(version: 20150428105107)    create_table "seven_event_events", force: :cascade |t|     t.string   "title"     t.text     "description"     t.datetime "start_at"     t.datetime "created_at",  null: false     t.datetime "updated_at",  null: false   end    create_table "seven_gallery_galleries", force: :cascade |t|     t.string   "title"     t.datetime "created_at",           null: false     t.datetime "updated_at",           null: false     t.integer  "seven_event_event_id"   end    add_index "seven_gallery_galleries", ["seven_event_event_id"], name: "index_seven_gallery_galleries_on_seven_event_event_id"    create_table "seven_gallery_photos", force: :cascade |t|     t.string   "caption"     t.string   "image"     t.integer  "seven_gallery_gallery_id"     t.datetime "created_at",                               null: false     t.datetime "updated_at",                               null: false     t.boolean  "is_new",                   default: true     t.boolean  "is_featured",              default: false     t.text     "description"     t.string   "alt"     t.integer  "position",                 default: 0     t.boolean  "is_main",                  default: false   end    add_index "seven_gallery_photos", ["seven_gallery_gallery_id"], name: "index_seven_gallery_photos_on_seven_gallery_gallery_id"  end 

backtrace:

# /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/attribute.rb:138:in `with_value_from_database'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/attribute_set.rb:39:in `write_from_user'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/attribute_methods/write.rb:74:in `write_attribute_with_type_cast'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/attribute_methods/write.rb:56:in `write_attribute'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/attribute_methods/dirty.rb:96:in `write_attribute'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/attribute_methods.rb:373:in `[]='      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/associations/belongs_to_association.rb:83:in `replace_keys'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/associations/belongs_to_association.rb:14:in `replace'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/associations/singular_association.rb:17:in `writer'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-4.2.1/lib/active_record/associations/builder/association.rb:123:in `gallery='      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:16:in `public_send'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:16:in `block (2 levels) in object'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:15:in `each'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:15:in `block in object'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:14:in `tap'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/attribute_assigner.rb:14:in `object'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/evaluation.rb:12:in `object'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/strategy/create.rb:9:in `result'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/factory.rb:42:in `run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/factory_runner.rb:23:in `block in run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.1/lib/active_support/notifications.rb:166:in `instrument'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/factory_runner.rb:22:in `run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/factory_girl-4.5.0/lib/factory_girl/strategy_syntax_method_registrar.rb:20:in `block in define_singular_strategy_method'      # ./spec/controllers/seven_gallery/photos_controller_spec.rb:8:in `block (3 levels) in <module:sevengallery>'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:177:in `instance_exec'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:177:in `block in run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:385:in `block in with_around_and_singleton_context_hooks'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:343:in `block in with_around_example_hooks'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/hooks.rb:474:in `block in run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/hooks.rb:614:in `block in run_around_example_hooks_for'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:247:in `call'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:247:in `call'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-rails-3.2.1/lib/rspec/rails/example/controller_example_group.rb:179:in `block (2 levels) in <module:controllerexamplegroup>'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:333:in `instance_exec'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:333:in `instance_exec'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/hooks.rb:387:in `execute_with'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/hooks.rb:616:in `block (2 levels) in run_around_example_hooks_for'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:247:in `call'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:247:in `call'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-rails-3.2.1/lib/rspec/rails/adapters.rb:113:in `block (2 levels) in <module:minitestlifecycleadapter>'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:333:in `instance_exec'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:333:in `instance_exec'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/hooks.rb:387:in `execute_with'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/hooks.rb:616:in `block (2 levels) in run_around_example_hooks_for'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:247:in `call'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:247:in `call'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/hooks.rb:617:in `run_around_example_hooks_for'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/hooks.rb:474:in `run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:343:in `with_around_example_hooks'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:385:in `with_around_and_singleton_context_hooks'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example.rb:174:in `run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example_group.rb:549:in `block in run_examples'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example_group.rb:545:in `map'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example_group.rb:545:in `run_examples'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example_group.rb:512:in `run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example_group.rb:513:in `block in run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example_group.rb:513:in `map'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/example_group.rb:513:in `run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/runner.rb:110:in `block (3 levels) in run_specs'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/runner.rb:110:in `map'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/runner.rb:110:in `block (2 levels) in run_specs'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/configuration.rb:1526:in `with_suite_hooks'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/runner.rb:109:in `block in run_specs'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/reporter.rb:62:in `report'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/runner.rb:108:in `run_specs'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/runner.rb:86:in `run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/runner.rb:70:in `run'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/lib/rspec/core/runner.rb:38:in `invoke'      # /home/rafael/.rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rspec-core-3.2.3/exe/rspec:4:in `<top (required)>'      # /home/rafael/.rbenv/versions/2.2.0/bin/rspec:23:in `load'      # /home/rafael/.rbenv/versions/2.2.0/bin/rspec:23:in `<main>' 

any ne appreciated. thanks.

to facing same problem. solution include foreign_key in both sides: has_many side , belongs_to side.