Ruby on rails 为什么升级到Rails 4后会出现这些PostgreSQL错误？

在升级到Ruby 2和Rails 4之前，我的Rspec测试套件完全通过了测试

自那时以来，我：

• 从Ruby 1.9.2升级到Ruby 2.0.0
• 从Rails 3.2.11升级到
• Rails 4.0.2根据需要升级了一些gem

现在，我收到以下错误消息：

PG::ProtocolViolation: ERROR:  bind message supplies 2 parameters, but prepared statement "a24" requires 1

（此问题末尾粘贴了完整堆栈跟踪。）

有问题的测试是：

it "should update a survey" do
  @product = create(:product)
  @question = create(:question, :product => @product)
  @f1 = create(:field, :question => @question)
  @f2 = create(:field, :question => @question)
  @f3 = create(:field, :question => @question)
  @f4 = create(:field, :question => @question)
  @review = create(:review, :product => @product)
  @competitor = @review.competitors.first
  @survey = @competitor.surveys.find_by_question_id(@question.id)
  @parameters = {"api_key"=>"redacted", "id"=>"#{@survey.id}", "environment"=>"production", "postback_url"=>"redacted", "blueprint"=>"three_radio_buttons_simple", "input"=>{redacted}, "status"=>"complete", "output"=>{"Pick_one"=>"option_1", "Sensible"=>"", "Bugs"=>""}, "verbose_output"=>{"Pick_one"=>"option_1", "Sensible"=>"", "Bugs"=>""}}
    post :receive, {:id => @survey.id, :params => @parameters}
  @postback = @survey.postbacks.last
  @postback.content["params"].should == @parameters
end

有问题的行调用以下工厂：

factory :review do
  sequence(:client_name)   {|n| "client-#{n}"}
  url                      {"http://#{client_name.downcase}.com"}
  test_client              true
  product
end

这些模型是这样关联的：

class Product < ActiveRecord::Base
  has_many :reviews
end

class Review < ActiveRecord::Base
  belongs_to :product
end

---

解决方案位于

数据库中。yml

：

test:
  prepared_statements: false

---

这在Rails 4.0.4中已经修复，升级让痛苦消失了

你能发布你的

调查

模型吗？Stacktrace指向

/survey.rb:78

听起来像是又一次。这些问题没有答案，但评论似乎有解决办法。嗨，穆，是的，我看到了其他问题，但没有找到足够的信息继续前进。嗨，斯里坎特。谢谢现在发布。我刚刚将第78行更新为Rails 4标准--

fields.map{f | results.find_或_create_by（：field_id=>f.id）}，除非销毁？

——但我仍然得到相同的错误。

class Survey < ActiveRecord::Base
  belongs_to :competitor, :touch => true
  belongs_to :question
  belongs_to :battery, :touch => true
  belongs_to :review
  has_many :screenshots
  has_many :results, :dependent => :delete_all
  has_many :postbacks, :dependent => :delete_all
  attr_accessible :selection, :input_id, :condition_id, :precondition_id, :override_points, :override_explanation, :bugs, :oddities
  delegate :potential_inputs, :product, :categories, :inputs, :to => :competitor, :allow_nil => true
  delegate :name, :standard, :element, :meta, :fields, :additive, :pictures, :to => :question, :allow_nil => true
  delegate :about, :pic_links, :manual, :level, :requires_data_from_other_question, :input_id, :to => :question, :allow_nil => true
  delegate :url_helpers, to: 'Rails.application.routes'
  after_create :create_matching_results, :delay_create_matching_batteries, :touch_review
  after_touch :delayed_reset_cache, :touch_dependencies  
  after_destroy :destroy_battery_if_empty

  def create_matching_results
    fields.map{|f| results.find_or_create_by_field_id(f.id)} unless destroyed? # line 78
  end  

end

test:
  prepared_statements: false