ruby - 如何为 RSpec 测试创建临时 DataMapper 模型？

Question

我想按照这些思路在 RSpec 测试期间创建一个 DataMapper 模型。但是如何从 RSpec 测试中创建底层 temp_models 表？

require 'spec_helper'

class TempModel
  include DataMapper::Resource
  property :id, Serial
  property :foo, String
end

describe "MyTests" do
  before(:all) do
    # what goes here to create the table and finalize the model?
  end
  after(:all) do
    # what goes here to drop the table?
  end
  before(:each) do
    TempModel.destroy!
  end

  it 'creates a TempModel' do
    expect { TempModel.create(:foo => "yowza")}.to_not raise_error
  end
end

所以，就像代码说的那样，我应该在before(:all)块中添加什么来在数据库中创建表并创建 DataMapper 模型？并在after(:all)块中删除表？

更新

或者，如何创建“本地迁移”并对其执行上下移动？

Answer 1

我挖掘了资源并尝试提出这个解决方案。如果有人对此有改进，请告诉我：

require 'spec_helper'

class TempModel
  include DataMapper::Resource
  property :id, Serial
  property :foo, String
end

describe "MyTests" do
  before(:all) do
    DataMapper.auto_upgrade!
    TempModel.finalize
  end
  after(:all) do
    adapter = DataMapper.repository(:default).adapter
    adapter.execute("DROP TABLE #{TempModel.storage_name}")
  end
  before(:each) do
    TempModel.destroy!
  end

  it 'creates a TempModel' do
    expect { TempModel.create(:foo => "yowza")}.to_not raise_error
  end
end