無法寫未知屬性`info'PrawnPDF

Question

我使用Prawn PDF即時生成發票PDF，但不斷收到錯誤“無法寫入未知屬性'info'”，但在任何相關數據庫表中的任何地方都沒有屬性'info' （或者我的整個數據庫）。 我不知道這是我所缺少的寶石。 這是我正在關注的教程： http : //www.idyllic-software.com/blog/creating-pdf-using-prawn-in-ruby-on-rails/和http://www.sitepoint.com/ pdf-generation-rails /

我確實在初始值設定項中注冊了mime類型（沒有顯示bc如此簡單，但是如果需要的話我可以）

我還多次重新啟動服務器，以確保這不是問題。

我知道gem已正確安裝，因為我可以生成一個空的PDF沒問題，但是當我嘗試添加@invoice時便遇到了問題。

發票顯示控制器操作：

def show
    @invoice = Invoice.find(params[:id])
    @customer = @invoice.customer
    @user = current_user
    @company = @user.company

    respond_to do |format|
        format.html
        format.pdf do
            pdf = InvoicePdf.new(@invoice)
            send_data pdf.render, filename: "invoice_#{@invoice.created_at.strftime("%m/%d/%Y")}.pdf", type: "application/pdf"
        end
    end
end

發票Pdf.rb

class InvoicePdf < Prawn::Document

    def intialize(invoice)
        super()
        @invoice = invoice
    end

    def header
        image "https://www.google.com/images/srpr/logo11w.png", width: 530, height: 150
    end

    def text_content
        y_position = cursor - 50

        bounding_box([0, y_position], :width => 270, :height => 300) do
          text "Lorem ipsum", size: 15, style: :bold
          text "Lorem ipsum dolor sit amet, consectetur adipiscing elit.  Suspendisse interdum semper placerat. Aenean mattis fringilla risus ut fermentum. Fusce posuere dictum venenatis. Aliquam id tincidunt ante, eu pretium eros. Sed eget risus a nisl aliquet scelerisque sit amet id nisi. Praesent porta molestie ipsum, ac commodo erat hendrerit nec. Nullam interdum ipsum a quam euismod, at consequat libero bibendum. Nam at nulla fermentum, congue lectus ut, pulvinar nisl. Curabitur consectetur quis libero id laoreet. Fusce dictum metus et orci pretium, vel imperdiet est viverra. Morbi vitae libero in tortor mattis commodo. Ut sodales libero erat, at gravida enim rhoncus ut."
        end

        bounding_box([300, y_position], :width => 270, :height => 300) do
          text "Duis vel", size: 15, style: :bold
          text "Duis vel tortor elementum, ultrices tortor vel, accumsan dui. Nullam in dolor rutrum, gravida turpis eu, vestibulum lectus. Pellentesque aliquet dignissim justo ut fringilla. Interdum et malesuada fames ac ante ipsum primis in faucibus. Ut venenatis massa non eros venenatis aliquet. Suspendisse potenti. Mauris sed tincidunt mauris, et vulputate risus. Aliquam eget nibh at erat dignissim aliquam non et risus. Fusce mattis neque id diam pulvinar, fermentum luctus enim porttitor. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos."
        end
    end

end

完整跟蹤：

    activerecord (4.1.0) lib/active_record/attribute_methods/write.rb:72:in `write_attribute'
    activerecord (4.1.0) lib/active_record/attribute_methods/dirty.rb:68:in `write_attribute'
    activerecord (4.1.0) lib/active_record/attribute_methods.rb:390:in `[]='
    pdf-core (0.6.0) lib/pdf/core/document_state.rb:42:in `normalize_metadata'
    pdf-core (0.6.0) lib/pdf/core/document_state.rb:5:in `initialize'
    prawn (2.0.2) lib/prawn/document.rb:200:in `new'
    prawn (2.0.2) lib/prawn/document.rb:200:in `initialize'
    app/controllers/invoices_controller.rb:23:in `new'
    app/controllers/invoices_controller.rb:23:in `block (2 levels) in show'
    actionpack (4.1.0) lib/action_controller/metal/mime_responds.rb:258:in `call'
    actionpack (4.1.0) lib/action_controller/metal/mime_responds.rb:258:in `respond_to'
    app/controllers/invoices_controller.rb:20:in `show'
    actionpack (4.1.0) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
    actionpack (4.1.0) lib/abstract_controller/base.rb:189:in `process_action'
    actionpack (4.1.0) lib/action_controller/metal/rendering.rb:10:in `process_action'
    actionpack (4.1.0) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
    activesupport (4.1.0) lib/active_support/callbacks.rb:113:in `call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:113:in `call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
    activesupport (4.1.0) lib/active_support/callbacks.rb:149:in `call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
    activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `block in halting'
    activesupport (4.1.0) lib/active_support/callbacks.rb:149:in `call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
    activesupport (4.1.0) lib/active_support/callbacks.rb:229:in `call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:229:in `block in halting'
    activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:166:in `block in halting'
    activesupport (4.1.0) lib/active_support/callbacks.rb:86:in `call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:86:in `run_callbacks'
    actionpack (4.1.0) lib/abstract_controller/callbacks.rb:19:in `process_action'
    actionpack (4.1.0) lib/action_controller/metal/rescue.rb:29:in `process_action'
    actionpack (4.1.0) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
    activesupport (4.1.0) lib/active_support/notifications.rb:159:in `block in instrument'
    activesupport (4.1.0) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
    activesupport (4.1.0) lib/active_support/notifications.rb:159:in `instrument'
    actionpack (4.1.0) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
    actionpack (4.1.0) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
    activerecord (4.1.0) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
    actionpack (4.1.0) lib/abstract_controller/base.rb:136:in `process'
    actionview (4.1.0) lib/action_view/rendering.rb:30:in `process'
    actionpack (4.1.0) lib/action_controller/metal.rb:195:in `dispatch'
    actionpack (4.1.0) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
    actionpack (4.1.0) lib/action_controller/metal.rb:231:in `block in action'
    actionpack (4.1.0) lib/action_dispatch/routing/route_set.rb:80:in `call'
    actionpack (4.1.0) lib/action_dispatch/routing/route_set.rb:80:in `dispatch'
    actionpack (4.1.0) lib/action_dispatch/routing/route_set.rb:48:in `call'
    actionpack (4.1.0) lib/action_dispatch/journey/router.rb:71:in `block in call'
    actionpack (4.1.0) lib/action_dispatch/journey/router.rb:59:in `each'
    actionpack (4.1.0) lib/action_dispatch/journey/router.rb:59:in `call'
    actionpack (4.1.0) lib/action_dispatch/routing/route_set.rb:676:in `call'
    omniauth (1.2.2) lib/omniauth/strategy.rb:186:in `call!'
    omniauth (1.2.2) lib/omniauth/strategy.rb:164:in `call'
    warden (1.2.3) lib/warden/manager.rb:35:in `block in call'
    warden (1.2.3) lib/warden/manager.rb:34:in `catch'
    warden (1.2.3) lib/warden/manager.rb:34:in `call'
    rack (1.5.2) lib/rack/etag.rb:23:in `call'
    rack (1.5.2) lib/rack/conditionalget.rb:25:in `call'
    rack (1.5.2) lib/rack/head.rb:11:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/flash.rb:254:in `call'
    rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context'
    rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/cookies.rb:560:in `call'
    activerecord (4.1.0) lib/active_record/query_cache.rb:36:in `call'
    activerecord (4.1.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call'
    activerecord (4.1.0) lib/active_record/migration.rb:380:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
    activesupport (4.1.0) lib/active_support/callbacks.rb:82:in `run_callbacks'
    actionpack (4.1.0) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/reloader.rb:73:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
    better_errors (2.1.1) lib/better_errors/middleware.rb:59:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
    railties (4.1.0) lib/rails/rack/logger.rb:38:in `call_app'
    railties (4.1.0) lib/rails/rack/logger.rb:20:in `block in call'
    activesupport (4.1.0) lib/active_support/tagged_logging.rb:68:in `block in tagged'
    activesupport (4.1.0) lib/active_support/tagged_logging.rb:26:in `tagged'
    activesupport (4.1.0) lib/active_support/tagged_logging.rb:68:in `tagged'
    railties (4.1.0) lib/rails/rack/logger.rb:20:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/request_id.rb:21:in `call'
    rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
    rack (1.5.2) lib/rack/runtime.rb:17:in `call'
    activesupport (4.1.0) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
    rack (1.5.2) lib/rack/lock.rb:17:in `call'
    actionpack (4.1.0) lib/action_dispatch/middleware/static.rb:64:in `call'
    rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
    railties (4.1.0) lib/rails/engine.rb:514:in `call'
    railties (4.1.0) lib/rails/application.rb:144:in `call'
    rack (1.5.2) lib/rack/lock.rb:17:in `call'
    rack (1.5.2) lib/rack/content_length.rb:14:in `call'
    rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service'
    /home/action/.parts/packages/ruby2.1/2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service'
    /home/action/.parts/packages/ruby2.1/2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run'
    /home/action/.parts/packages/ruby2.1/2.1.1/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'

Answer 1

仍然不知道問題出在哪里，但是在安裝上肯定有毛刺。 我重新設置了對蝦的整個設置，現在可以正常工作了……沒什么不同。