Ruby on rails 4 NameError:未初始化的常量ModelName
我正在尝试将一些数据从CSV上传到我的db(Rails4中的sqlite3)。我遵循了列出的步骤,不仅是第一条评论中包含的步骤,还有第二条评论中的备选选项。我遇到了一个命名错误:未初始化的常量绘图(我的模型名) 我试图通过将config.autoload_路径+=%W(#{config.root}/lib)作为建议包含进来来修复它,但没有成功。你知道如何解决这个问题吗?不想将CSV文件存储在应用程序中,但要将其行转移到my DB中,并使用它们的值创建记录 lib/tasks/import_图形_csv.rakeRuby on rails 4 NameError:未初始化的常量ModelName,ruby-on-rails-4,rake,Ruby On Rails 4,Rake,我正在尝试将一些数据从CSV上传到我的db(Rails4中的sqlite3)。我遵循了列出的步骤,不仅是第一条评论中包含的步骤,还有第二条评论中的备选选项。我遇到了一个命名错误:未初始化的常量绘图(我的模型名) 我试图通过将config.autoload_路径+=%W(#{config.root}/lib)作为建议包含进来来修复它,但没有成功。你知道如何解决这个问题吗?不想将CSV文件存储在应用程序中,但要将其行转移到my DB中,并使用它们的值创建记录 lib/tasks/import_图形_
task :drawing => :environment do
require 'csv'
csv_text = File.read('path/to/public/imageshello.csv')
CSV.foreach("path/to/public/imageshello.csv", :headers => true) do |row|
Drawing.create!(row.to_hash)
end
end
终端轨迹
javiers-mbp:colour malditojavi$ rake import_drawings_csv
rake aborted!
NameError: uninitialized constant Drawing
/Users/malditojavi/Desktop/colour/lib/tasks/import_drawings_csv.rake:5:in `block in <top (required)>'
/Users/malditojavi/Desktop/colour/lib/tasks/import_drawings_csv.rake:4:in `<top (required)>'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:658:in `load'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:658:in `block in run_tasks_blocks'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:658:in `each'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:658:in `run_tasks_blocks'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/application.rb:438:in `run_tasks_blocks'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:453:in `load_tasks'
/Users/malditojavi/Desktop/colour/Rakefile:6:in `<top (required)>'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `eval'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `<main>'
(See full trace by running task with --trace)
javiers-mbp:colour malditojavi$ rake import_drawings_csv
javiers mbp:Color malditojavi$rake导入\u图纸\u csv
雷克流产了!
NameError:未初始化的常量图形
/Users/malditojavi/Desktop/color/lib/tasks/import_drawings_csv.rake:5:in'block in'
/Users/malditojavi/Desktop/color/lib/tasks/import\u drawings\u csv.rake:4:in`'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:658:in'load'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:658:在“运行中的块任务块”中
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:658:in'each'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:658:在“运行任务块”中
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/application.rb:438:在“运行任务块”中
/Users/malditojavi/.rvm/gems/ruby-2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:453:in'load_tasks'
/用户/malditojavi/Desktop/color/Rakefile:6:in`'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in'eval'
/Users/malditojavi/.rvm/gems/ruby-2.2.0/bin/ruby\u executable\u hooks:15:in`'
(通过使用--trace运行任务查看完整跟踪)
javiers mbp:Color malditojavi$rake导入\u图纸\u csv
application.rb
require File.expand_path('../boot', __FILE__)
require 'rails/all'
# Require the gems listed in Gemfile, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(*Rails.groups)
module Colour
class Application < Rails::Application
# new line added for autoloading libs
config.autoload_paths += %W(#{config.root}/lib)
# Settings in config/environments/* take precedence over those specified here.
# Application configuration should go into files in config/initializers
# -- all .rb files in that directory are automatically loaded.
# Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
# Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
# config.time_zone = 'Central Time (US & Canada)'
# The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
# config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
# config.i18n.default_locale = :de
# Do not swallow errors in after_commit/after_rollback callbacks.
config.active_record.raise_in_transactional_callbacks = true
end
end
需要文件。展开路径('../boot',文件)
需要“rails/all”
#需要Gemfile中列出的宝石,包括任何宝石
#您仅限于:测试、开发或:生产。
Bundler.require(*Rails.groups)
模块颜色
类应用程序
使用以下语法将解决您的问题
namespace :update_drawing do
desc "Drawing desc"
task :draw_me => :environment do
csv_text = File.read('path/to/public/imageshello.csv')
CSV.foreach('path/to/public/imageshello.csv', :headers => true) do |row|
Drawing.create!(row.to_hash)
end
end
end