解决活动记录夹具格式错误
我正在尝试测试我的应用程序，并不断收到以下错误：
Error: ContractsControllerTest#test_should_get_show: ActiveRecord::Fixture::FormatError: ActiveRecord::Fixture::FormatError Error: ContractsControllerTest#test_should_get_show: NoMethodError: undefined method `each' for nil:NilClass 下面是我的合同控制器上的代码，我在所有控制器上都有类似的代码。
def index @contract = Contract.all.paginate(page: params[:page], :per_page => 70) end def show @contract = Contract.find(params[:id]) end def new @contract = Contract.new end def create @contract = Contract.new(located) if @contract.save flash[:success] = "A record has been successfully added" redirect_to contracts_path else render 'new' end end def located params.require(:contract).permit(:contract_name, :contract_status, :services_rendered, :contract_value, :award_year) end # editing a record in the contract from cotract table def edit @contract = Contract.find(params[:id]) end def update @contract = Contract.find(params[:id]) if @contract.update_attributes(located) flash[:success] = "Contract form updated" redirect_to contracts_path else render'edit' end end def destroy Contract.find(params[:id]).destroy flash[:success] = "A record has been successfully deleted" redirect_to contracts_path end
下面是运行命令rails db：fixtures：load –trace时的完整错误跟踪
rails aborted! ActiveRecord::Fixture::FormatError: ActiveRecord::Fixture::FormatError /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixture_set/file.rb:72:in `validate' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixture_set/file.rb:49:in `raw_rows' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixture_set/file.rb:37:in `config_row' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixture_set/file.rb:27:in `model_class' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:791:in `block (2 levels) in read_fixture_files' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixture_set/file.rb:15:in `open' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:790:in `block in read_fixture_files' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:789:in `each' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:789:in `each_with_object' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:789:in `read_fixture_files' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:598:in `initialize' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:529:in `new' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:529:in `block (2 levels) in create_fixtures' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:526:in `map' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:526:in `block in create_fixtures' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/connection_adapters/postgresql/referential_integrity.rb: 22:in `disable_referential_integrity' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/fixtures.rb:523:in `create_fixtures' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 5.0.5/lib/active_record/railties/databases.rake:207:in `block (3 levels) in ' /usr/local/rvm/gems/ruby-2.3.0/gems/railties- 5.0.5/lib/rails/commands/rake_proxy.rb:14:in `block in run_rake_task' /usr/local/rvm/gems/ruby-2.3.0/gems/railties- 5.0.5/lib/rails/commands/rake_proxy.rb:11:in `run_rake_task' /usr/local/rvm/gems/ruby-2.3.0/gems/railties- 5.0.5/lib/rails/commands/commands_tasks.rb:51:in `run_command!' /usr/local/rvm/gems/ruby-2.3.0/gems/railties- 5.0.5/lib/rails/commands.rb:18:in `' /home/ubuntu/workspace/final_project/bin/rails:9:in `require' /home/ubuntu/workspace/final_project/bin/rails:9:in `' /usr/local/rvm/gems/ruby-2.3.0/gems/spring- 2.0.2/lib/spring/client/rails.rb:28:in `load' /usr/local/rvm/gems/ruby-2.3.0/gems/spring- 2.0.2/lib/spring/client/rails.rb:28:in `call' /usr/local/rvm/gems/ruby-2.3.0/gems/spring- 2.0.2/lib/spring/client/command.rb:7:in `call' /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/lib/spring/client.rb:30:in `run' /usr/local/rvm/gems/ruby-2.3.0/gems/spring-2.0.2/bin/spring:49:in `' /usr/local/rvm/gems/ruby-2.3.0/gems/spring- 2.0.2/lib/spring/binstub.rb:31:in `load' /usr/local/rvm/gems/ruby-2.3.0/gems/spring- 2.0.2/lib/spring/binstub.rb:31:in`' /home/ubuntu/workspace/final_project/bin/spring:15:in `require' /home/ubuntu/workspace/final_project/bin/spring:15:in `' bin/rails:3:in `load' bin/rails:3:in `' Tasks: TOP => db:fixtures:load (See full trace by running task with --trace)
我的应用程序包含12个控制器，每个控制器都会出现相同的错误。 另外，我的模式中有10个表，其中一些表包含彼此的引用/关系。
我真的不知道出了什么问题，现在我已经在这个问题上苦苦挣扎了四天。 如果有人能帮我提供任何可以帮助我追踪错误来源的代码或信息，我将不胜感激。 如果您能够提供有关我应该在何处放置代码以及跟踪并解决此错误的确切信息，我将不胜感激。
谢谢
test / fixtures中的一个fixture文件格式错误。 问题似乎与您的控制器或测试无关，因为它们正在发生在每一个控制器或测试中。 在每次测试之前，所有灯具都会加载到测试数据库中，即使某些灯具不用于当前测试。 因此，如果其中一个文件中存在错误，则每次测试都会引发错误。
根据来自activerecord源的行 ，该行将错误抛出到您提供的堆栈跟踪的顶部， ActiveRecord期望YAML fixture文件中的每个条目都是引用哈希的键。
灯具中的每个条目都应代表模型实例。 顶级键用作引用该实例的名称（rails通常在为新模型生成fixture模板时将它们命名为one和two ）。 这是一个示例YAML夹具，其中包含一个好的条目和一些不同类型的坏条目。
# This will produce a hash associated to key :hash_entry. # This is the correct type of entry, all others that follow are incorrect for rails fixtures. hash_entry: key1: value1 key2: value2 # This will produce the string "not a hash" associated to key :string_entry string_entry: not a hash # This will produce the array ["also", "not","a","hash"] associated to key :array_entry array_entry: - also - not - a - hash # This will produce nil associated to key :nil_entry nil_entry:
您需要检查test / fixtures中的fixture文件，并查找具有如上所述的错误格式的任何文件。 这是一个rake任务，可帮助您识别需要更正的文件和条目。 首先运行rails g task fixtures check_format ，并将此代码放在lib/tasks/fixtures.rake生成的rake文件中。
namespace :fixtures do desc "Looks for bad fixture files" task check_format: :environment do fixtures_dir = Rails.root.join("test", "fixtures") fixture_files = Pathname.glob("#{fixtures_dir}/**/*.yml") fixture_files.each do |file| fixture = YAML.load(IO.read(file)) fixture.each_pair do |name, entry| puts "Bad fixture entry #{name}: #{entry.inspect} in fixture #{file}" unless entry.is_a? Hash end end end end
然后运行rails fixtures:check_format ，将在命令行打印出有问题的文件和条目，供您查找和更正。