ruby on rails - NoMethodError - undefined method `file' for on simple query -

i want show picture throws same error. join correct doesn't show image instead throws error.

within /series_images/ show , index image displayed with

<%= image_tag(@series_image.file, class: "img-responsive",) %> 

that's working without problems.

here server

started "/series/beyond-the-boundary" 127.0.0.1 @ 2016-01-06 01:44:03 +0100 processing seriescontroller#show html   parameters: {"id"=>"beyond-the-boundary"}   series load (0.3ms)  select  "series".* "series" "series"."slug" = $1  order "series"."id" asc limit 1  [["slug", "beyond-the-boundary"]]   seriesimage load (0.3ms)  select "series_images".* "series_images" "series_images"."series_id" = $1  [["series_id", 1]]   rendered series/show.html.erb within layouts/application (3.4ms) completed 500 internal server error in 7ms (activerecord: 0.5ms)  nomethoderror - undefined method `file' #<seriesimage::activerecord_associations_collectionproxy:0x007fc0e70be6e0>:   activerecord (4.2.5) lib/active_record/relation/delegation.rb:136:in `method_missing'   activerecord (4.2.5) lib/active_record/relation/delegation.rb:99:in `method_missing'   app/views/series/show.html.erb:2:in `_app_views_series_show_html_erb__1653679829410534096_70233272992260'   actionview (4.2.5) lib/action_view/template.rb:145:in `block in render'   activesupport (4.2.5) lib/active_support/notifications.rb:166:in `instrument'   actionview (4.2.5) lib/action_view/template.rb:333:in `instrument'   actionview (4.2.5) lib/action_view/template.rb:143:in `render'   actionview (4.2.5) lib/action_view/renderer/template_renderer.rb:54:in `block (2 levels) in render_template'   actionview (4.2.5) lib/action_view/renderer/abstract_renderer.rb:39:in `block in instrument'   activesupport (4.2.5) lib/active_support/notifications.rb:164:in `block in instrument'   activesupport (4.2.5) lib/active_support/notifications/instrumenter.rb:20:in `instrument'   activesupport (4.2.5) lib/active_support/notifications.rb:164:in `instrument'   actionview (4.2.5) lib/action_view/renderer/abstract_renderer.rb:39:in `instrument'   actionview (4.2.5) lib/action_view/renderer/template_renderer.rb:53:in `block in render_template'   actionview (4.2.5) lib/action_view/renderer/template_renderer.rb:61:in `render_with_layout'   actionview (4.2.5) lib/action_view/renderer/template_renderer.rb:52:in `render_template'   actionview (4.2.5) lib/action_view/renderer/template_renderer.rb:14:in `render'   actionview (4.2.5) lib/action_view/renderer/renderer.rb:42:in `render_template'   actionview (4.2.5) lib/action_view/renderer/renderer.rb:23:in `render'   actionview (4.2.5) lib/action_view/rendering.rb:100:in `_render_template'   actionpack (4.2.5) lib/action_controller/metal/streaming.rb:217:in `_render_template'   actionview (4.2.5) lib/action_view/rendering.rb:83:in `render_to_body'   actionpack (4.2.5) lib/action_controller/metal/rendering.rb:32:in `render_to_body'   actionpack (4.2.5) lib/action_controller/metal/renderers.rb:37:in `render_to_body'   actionpack (4.2.5) lib/abstract_controller/rendering.rb:25:in `render'   actionpack (4.2.5) lib/action_controller/metal/rendering.rb:16:in `render'   actionpack (4.2.5) lib/action_controller/metal/instrumentation.rb:44:in `block (2 levels) in render'   activesupport (4.2.5) lib/active_support/core_ext/benchmark.rb:12:in `block in ms'   /users/woorari/.rbenv/versions/2.2.3/lib/ruby/2.2.0/benchmark.rb:303:in `realtime'   activesupport (4.2.5) lib/active_support/core_ext/benchmark.rb:12:in `ms'   actionpack (4.2.5) lib/action_controller/metal/instrumentation.rb:44:in `block in render'   actionpack (4.2.5) lib/action_controller/metal/instrumentation.rb:87:in `cleanup_view_runtime'   activerecord (4.2.5) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime'   actionpack (4.2.5) lib/action_controller/metal/instrumentation.rb:43:in `render'   actionpack (4.2.5) lib/action_controller/metal/implicit_render.rb:10:in `default_render'   actionpack (4.2.5) lib/action_controller/metal/implicit_render.rb:5:in `send_action'   actionpack (4.2.5) lib/abstract_controller/base.rb:198:in `process_action'   actionpack (4.2.5) lib/action_controller/metal/rendering.rb:10:in `process_action'   actionpack (4.2.5) lib/abstract_controller/callbacks.rb:20:in `block in process_action'   activesupport (4.2.5) lib/active_support/callbacks.rb:117:in `call'   activesupport (4.2.5) lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'   activesupport (4.2.5) lib/active_support/callbacks.rb:505:in `call'   activesupport (4.2.5) lib/active_support/callbacks.rb:92:in `__run_callbacks__'   activesupport (4.2.5) lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'   activesupport (4.2.5) lib/active_support/callbacks.rb:81:in `run_callbacks'   actionpack (4.2.5) lib/abstract_controller/callbacks.rb:19:in `process_action'   actionpack (4.2.5) lib/action_controller/metal/rescue.rb:29:in `process_action'   actionpack (4.2.5) lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'   activesupport (4.2.5) lib/active_support/notifications.rb:164:in `block in instrument'   activesupport (4.2.5) lib/active_support/notifications/instrumenter.rb:20:in `instrument'   activesupport (4.2.5) lib/active_support/notifications.rb:164:in `instrument'   actionpack (4.2.5) lib/action_controller/metal/instrumentation.rb:30:in `process_action'   actionpack (4.2.5) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'   activerecord (4.2.5) lib/active_record/railties/controller_runtime.rb:18:in `process_action'   actionpack (4.2.5) lib/abstract_controller/base.rb:137:in `process'   actionview (4.2.5) lib/action_view/rendering.rb:30:in `process'   actionpack (4.2.5) lib/action_controller/metal.rb:196:in `dispatch'   actionpack (4.2.5) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'   actionpack (4.2.5) lib/action_controller/metal.rb:237:in `block in action'   actionpack (4.2.5) lib/action_dispatch/routing/route_set.rb:76:in `dispatch'   actionpack (4.2.5) lib/action_dispatch/routing/route_set.rb:45:in `serve'   actionpack (4.2.5) lib/action_dispatch/journey/router.rb:43:in `block in serve'   actionpack (4.2.5) lib/action_dispatch/journey/router.rb:30:in `serve'   actionpack (4.2.5) lib/action_dispatch/routing/route_set.rb:817:in `call'   warden (1.2.4) lib/warden/manager.rb:35:in `block in call'   warden (1.2.4) lib/warden/manager.rb:34:in `call'   rack (1.6.4) lib/rack/etag.rb:24:in `call'   rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'   rack (1.6.4) lib/rack/head.rb:13:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/params_parser.rb:27:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/flash.rb:260:in `call'   rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'   rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/cookies.rb:560:in `call'   activerecord (4.2.5) lib/active_record/query_cache.rb:36:in `call'   activerecord (4.2.5) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'   activerecord (4.2.5) lib/active_record/migration.rb:377:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'   activesupport (4.2.5) lib/active_support/callbacks.rb:88:in `__run_callbacks__'   activesupport (4.2.5) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'   activesupport (4.2.5) lib/active_support/callbacks.rb:81:in `run_callbacks'   actionpack (4.2.5) lib/action_dispatch/middleware/callbacks.rb:27:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/reloader.rb:73:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'   better_errors (2.1.1) lib/better_errors/middleware.rb:84:in `protected_app_call'   better_errors (2.1.1) lib/better_errors/middleware.rb:79:in `better_errors_call'   better_errors (2.1.1) lib/better_errors/middleware.rb:57:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'   web-console (2.2.1) lib/web_console/middleware.rb:39:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'   railties (4.2.5) lib/rails/rack/logger.rb:38:in `call_app'   railties (4.2.5) lib/rails/rack/logger.rb:20:in `block in call'   activesupport (4.2.5) lib/active_support/tagged_logging.rb:68:in `block in tagged'   activesupport (4.2.5) lib/active_support/tagged_logging.rb:26:in `tagged'   activesupport (4.2.5) lib/active_support/tagged_logging.rb:68:in `tagged'   railties (4.2.5) lib/rails/rack/logger.rb:20:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/request_id.rb:21:in `call'   rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'   rack (1.6.4) lib/rack/runtime.rb:18:in `call'   activesupport (4.2.5) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'   rack (1.6.4) lib/rack/lock.rb:17:in `call'   actionpack (4.2.5) lib/action_dispatch/middleware/static.rb:116:in `call'   rack (1.6.4) lib/rack/sendfile.rb:113:in `call'   railties (4.2.5) lib/rails/engine.rb:518:in `call'   railties (4.2.5) lib/rails/application.rb:165:in `call'   rack (1.6.4) lib/rack/lock.rb:17:in `call'   rack (1.6.4) lib/rack/content_length.rb:15:in `call'   rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service'   /users/woorari/.rbenv/versions/2.2.3/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'   /users/woorari/.rbenv/versions/2.2.3/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'   /users/woorari/.rbenv/versions/2.2.3/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'    started post "/__better_errors/a376ff2bf7c7dd19/variables" 127.0.0.1 @ 2016-01-06 01:44:03 +0100 

the call happen within series/show.html.erb

<%= image_tag(@series.series_image.file, class: "img-responsive",) %> <p>   <strong>name:</strong>   <%= @series.name %> </p> 

series controller

class seriescontroller < applicationcontroller   before_action :set_series, only: [:show, :edit, :update, :destroy]    # /series   # /series.json   def index     @series = series.paginate(:page => params[:page], :per_page => 10)   end    # /series/1   # /series/1.json   def show   end    # /series/new   def new     @series = series.new    end    # /series/1/edit   def edit   end    # post /series   # post /series.json   def create     @series = series.new(series_params)      respond_to |format|       if @series.save         format.html { redirect_to @series, notice: 'series created.' }         format.json { render :show, status: :created, location: @series }       else         format.html { render :new }         format.json { render json: @series.errors, status: :unprocessable_entity }       end     end   end    # patch/put /series/1   # patch/put /series/1.json   def update     respond_to |format|       if @series.update(series_params)         format.html { redirect_to @series, notice: 'series updated.' }         format.json { render :show, status: :ok, location: @series }       else         format.html { render :edit }         format.json { render json: @series.errors, status: :unprocessable_entity }       end     end   end    # delete /series/1   # delete /series/1.json   def destroy     @series.destroy     respond_to |format|       format.html { redirect_to series_index_url, notice: 'series destroyed.' }       format.json { head :no_content }     end   end    private     # use callbacks share common setup or constraints between actions.     def set_series       @series = series.friendly.find(params[:id])     end      # never trust parameters scary internet, allow white list through.     def series_params       params.require(:series).permit(:name, :tagline, :shortdesc, :longdesc, :rating, :release)     end end 

seriesimage controller

class seriesimagescontroller < applicationcontroller   before_action :set_series_image, only: [:show, :edit, :update, :destroy]    # /series_images   # /series_images.json   def index     @series_images = seriesimage.paginate(:page => params[:page], :per_page => 5)   end    # /series_images/1   # /series_images/1.json   def show   end    # /series_images/new   def new     @series_image = seriesimage.new   end    # /series_images/1/edit   def edit   end    # post /series_images   # post /series_images.json   def create     @series_image = seriesimage.new(series_image_params)      respond_to |format|       if @series_image.save         format.html { redirect_to @series_image, notice: 'series image created.' }         format.json { render :show, status: :created, location: @series_image }       else         format.html { render :new }         format.json { render json: @series_image.errors, status: :unprocessable_entity }       end     end   end    # patch/put /series_images/1   # patch/put /series_images/1.json   def update     respond_to |format|       if @series_image.update(series_image_params)         format.html { redirect_to @series_image, notice: 'series image updated.' }         format.json { render :show, status: :ok, location: @series_image }       else         format.html { render :edit }         format.json { render json: @series_image.errors, status: :unprocessable_entity }       end     end   end    # delete /series_images/1   # delete /series_images/1.json   def destroy     @series_image.destroy     respond_to |format|       format.html { redirect_to series_images_url, notice: 'series image destroyed.' }       format.json { head :no_content }     end   end    private     # use callbacks share common setup or constraints between actions.     def set_series_image       @series_image = seriesimage.find(params[:id])     end      # never trust parameters scary internet, allow white list through.     def series_image_params       params.require(:series_image).permit(:series_id, :file, :desc, :head, :headid, :home, :homeid)     end end 

the 2 models

class series < activerecord::base   extend friendlyid   friendly_id :name, use: :slugged    validates :name, presence: true    has_many :series_images  end   class seriesimage < activerecord::base   mount_uploader :file, pictureuploader    belongs_to :series   end 

the gemfile

#better ids gem 'friendly_id', '~> 5.1' #bootstrap gem 'bootstrap-sass', '~> 3.3', '>= 3.3.6' #image upload gem 'carrierwave', '~> 0.10.0' #bootswatch gem 'bootswatch-rails', '~> 3.3', '>= 3.3.5'  # devise user management gem 'devise', '~> 3.5', '>= 3.5.3'  #pagination gem 'will_paginate', '~> 3.1' gem 'will_paginate-bootstrap', '~> 1.0', '>= 1.0.1' 

the migration of series_images

class createseriesimages < activerecord::migration   def change     create_table :series_images |t|       t.belongs_to :series, index:true       t.string :file       t.string :desc       t.boolean :head       t.integer :headid       t.boolean :home       t.integer :homeid        t.timestamps null: false     end   end end 

the problem have 1 many relationship between series , seriesimages. when call @series.series_image in view getting active record collection instead of specific image. try doing @series.series_image.first.try(:file) , give first series_image if exist. if fails return nil.

is series supposed have multiple seriesimages?