小编Ben*_*hol的帖子

我正在跟随rails教程.我在上.6我和SQLite3有一个奇怪的错误(为了记录,我使用的是sqlite 1.3.10版本,教程使用的是1.3.9)

运行rake db:migrate时我没有收到错误,但是当我为测试环境运行迁移时,我得到的是:

$ bundle exec rake test:models

rake aborted!
ActiveRecord::PendingMigrationError:

Migrations are pending. To resolve this issue, run:

    bin/rake db:migrate RAILS_ENV=test

sample_app/test/test_helper.rb:3:in `<top (required)>'
sample_app/test/models/user_test.rb:1:in `require'
sample_app/test/models/user_test.rb:1:in `<top (required)>'
Tasks: TOP => test:models
(See full trace by running task with --trace)


$ bundle exec rake db:migrate RAILS_ENV=test

== 20150628011937 AddIndexToUsersEmail: migrating ===========================
==
    -- add_index(:users, :email, {:unique=>true})
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:


SQLite3::ConstraintException: UNIQUE constraint failed: users.email: CREATE UNIQUE INDEX …

我正在尝试创建一个按日期和school_id查找课程的创建操作.如果这些参数没有课程,那么我创建一个新的课程.我没有使用find_by_or_create或类似方法的原因是因为我想添加Lesson的目标(如果它存在),也不会覆盖它.

这是我的控制器,我相信所有这些都是相关的:

存在吗？call永远不会返回true,即使我运行rails console并使用相同的参数将其键入控制台,它也会返回true.与find_by相同

def create
  find_or_create_lesson
  if @lesson.save
    flash[:success] = "Response logged"
    redirect_to @lesson
  else
    @user = current_user
    @school_options = School.all.map { |s| [s.name, s.id] }
    render 'new'
  end
end

private

  # strong params
  def lesson_params
    params.require(:lesson).permit(:school_id, :date,
                                   goals_attributes: [:id,   :user_id,
                                                      :text, :lesson_id])
  end

  # Finds a lesson with the same date and school, or creates the lesson
  def find_or_create_lesson
    search_params =  { date:      lesson_params[:date],
                       school_id: lesson_params[:school_id] }
    if Lesson.exists?(search_params)
      @lesson = Lesson.find_by(search_params)
      @lesson.goals << Goal.new(goals)
      @lesson.assign_attributes(search_params)
    else
      @lesson …