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What causes this error? ActionView :: Template :: Error: ActionController :: Metal # session delegated @ _request.session, but @_request is zero

In /app/models/review.rb I have a method that is designed to create a PDF file from the result of the review#print action. Also designed to capture my entire print stylesheet and paste it into the header when I'm in production mode:

 def create_pdf snip # code that sets @competitors, @elements & @questions css = Rails.application.assets.find_asset('print').to_s if Rails.env.production? html = ActionController::Base.new.render_to_string "reviews/print", :locals => {:@review => self, :@competitors => @competitors, :@elements => @elements, :@questions => @questions, :@css => css} pdf = HyPDF.new(html, :test => true) upload = pdf.upload_to_s3("Testivate", [self.id, "_", Time.now.full_time, ".pdf"].join.downcase.gsub(" ", "_"), true) self.update_attribute :latest_url, upload NotificationMailer.pdf_creation(self).deliver return html.to_s.truncate(300) # for debugging -- so I can see <head> end

I have tried many variations of this code, including passing :layouts => false and more on render .

My reviews_controller.rb contains:

 class ReviewsController < ApplicationController respond_to :html filter_access_to :all layout "print", :only => [:print, :pdf] def print snip # code that sets @review, @competitors, @elements @questions respond_with(@review) end end

My app/views/reviews/print.html.haml contains:

 !!! %html %head %title Testivate - if @css.present? = content_tag(:style, @css.html_safe, :type => "text/css") - else = stylesheet_link_tag "print", :media => "print, screen, projection"

Why then do I get the following error when I call @review.create_pdf ?

 Rendered reviews/print.html.haml (366.3ms) ActionView::Template::Error: ActionController::Metal#session delegated to @_request.session, but @_request is nil: #<ActionController::Base:0x00000002bffd40 @_routes=nil, @_action_has_layout=true, @_headers={"Content-Type"=>"text/html"}, @_status=200, @_request=nil, @_response=nil, @_prefixes=["action_controller/base"], @_lookup_context=#<ActionView::LookupContext:0x00000002bec560 @details_key=#<ActionView::LookupContext::DetailsKey:0x000000096296a8 @hash=-2527668597365468702>, @details={:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :haml]}, @skip_default_locale=false, @cache=true, @prefixes=["action_controller/base"], @rendered_format=:html, @view_paths=#<ActionView::PathSet:0x00000002bec4c0 @paths=[/app/app/views, /app/vendor/bundle/ruby/1.9.1/gems/declarative_authorization-0.5.7/app/views]>>, @_view_renderer=#<ActionView::Renderer:0x00000002be4a18 @lookup_context=#<ActionView::LookupContext:0x00000002bec560 @details_key=#<ActionView::LookupContext::DetailsKey:0x000000096296a8 @hash=-2527668597365468702>, @details={:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :haml]}, @skip_default_locale=false, @cache=true, @prefixes=["action_controller/base"], @rendered_format=:html, @view_paths=#<ActionView::PathSet:0x00000002bec4c0 @paths=[/app/app/views, /app/vendor/bundle/ruby/1.9.1/gems/declarative_authorization-0.5.7/app/views]>>, @_template_renderer=#<ActionView::TemplateRenderer:0x00000009637870 @lookup_context=#<ActionView::LookupContext:0x00000002bec560 @details_key=#<ActionView::LookupContext::DetailsKey:0x000000096296a8 @hash=-2527668597365468702>, @details={:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :haml]}, @skip_default_locale=false, @cache=true, @prefixes=["action_controller/base"], @rendered_format=:html, @view_paths=#<ActionView::PathSet:0x00000002bec4c0 @paths=[/app/app/views, /app/vendor/bundle/ruby/1.9.1/gems/declarative_authorization-0.5.7/app/views]>>, @view=#<#<Class:0x00000002be4950>:0x000000096da390 @_config={}, @view_renderer=#<ActionView::Renderer:0x00000002be4a18 ...>, @_routes=nil, @_assigns={"_routes"=>nil}, @_controller=#<ActionController::Base:0x00000002bffd40 ...>, @_request=nil, @view_flow=#<ActionView::OutputFlow:0x000000096da200 @content={}>, @output_buffer="", @virtual_path="reviews/print", @competitors=[#<Competitor id: 56, etc etc...>, @css="html,body,div,span,applet,object,iframe,etc ... (which is the css reset at the start of my stylseheet) ...on:none}\n", etc

Update:

I tried to create a method from the Controller action on Review, not a class method, but I got the same ActionView::Template::Error: .

Update 2:

The view code in the request to verify it without trying to access the session:

(I do not think so.)

 !!! %html %head %title Testivate - if @css.present? = content_tag(:style, @css.html_safe, :type => "text/css") - else = stylesheet_link_tag "print", :media => "print, screen, projection" = csrf_meta_tag = analytics_init if Rails.env.production? %body .header .imagebox =image_tag "Testivate-logo.svg", :width => "300" %h1#first Confidential Competitive Website Review & Benchmark .imagebox =image_tag @review.owner_logo.url .body %p Review conducted for #{@review.client_name}. .header %h1 Research overview .body %p The methodology that drives this research is #{@review.product.full_name}. = raw @review.product.description %p Between #{@review.created_at.full_date} and #{@review.updated_at.full_date}, Testivate tested and compared #{pluralize @review.competitors.count, "website"}: - @competitors.sort{|c| c.name <=> c.name}.each do |competitor| .imagebox = image_tag competitor.logo.url(:thumb) %h4 #{competitor.name} %h4 #{competitor.url} .header %h1 Results summary .body %p #{pluralize @review.winners.count, "entrant"} led the review group with a score of #{@review.top_score}: #{@review.winners.map{|w| w.name}.join("; ")}. %table %thead %tr %th.not_controls Website %th Score %th.not_controls Website %th Score %tbody - @competitors.each_slice(2).each do |competitor_pair| %tr %td.not_controls= competitor_pair.first.name %td.not_controls= competitor_pair.first.current_score %td.not_controls - unless competitor_pair.count == 1 = competitor_pair.last.name %td.not_controls - unless competitor_pair.count == 1 = competitor_pair.last.current_score .header %h1 Tested website elements .body %p The research involve testing #{pluralize @elements.count, "element"}: %table %thead %tr %th Element: - @elements.each do |element| %th= element.name %tbody - @competitors.each do |competitor| %tr %td.first= competitor.name - @elements.each do |element| %td.not_controls= competitor.element_score(element) .header %h1 Website testing standards .body %p The research involve testing #{pluralize Standard.all.count, "standard"}: %table %thead %tr %th Standard: - Standard.all.each do |standard| %th= standard.name %tbody - @competitors.each do |competitor| %tr %td.first= competitor.name - Standard.all.each do |standard| %td.not_controls= competitor.standard_score(standard) - @questions.each do |question| .header %h1 Question details .body %h3= question.name %p Standard: #{question.standard.try(:name)} %p Element: #{question.element.try(:name)} %table %thead %tr %th Competitor %th Score %th Explanation %tbody - @competitors.each do |competitor| %tr %td.first= competitor.name %td.not_controls= competitor.current_score_for_question(question) %td.not_controls= competitor.explanation_for_score_for_question(question) - unless question.endmatter.blank? %h3 References %p To understand more about how this question was scored or how to fix any problems that were uncovered, consult the following references: = raw question.endmatter
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1 answer

As Fekmore said, the problem is with the inclusion of csrf_meta_tag in Layout.

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Source: https://habr.com/ru/post/1493123/

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