英文:

How to write tests for child of abstract class? Rails expects a table name to be specified for the parent?

问题

我有两个相关的类：

```ruby
class A < ApplicationRecord
  self.abstract_class = true
  ...
end
class B < A
  ...
end

我想测试是否可以创建类B：

class BTest < ActiveSupport::TestCase
  test "可以创建B" do
    record = B.create!
    assert record.valid?
  end
end

然而，测试套件似乎不理解A是一个抽象类。它给我以下错误：

BTest#test_can_create_b:
ActiveRecord::TableNotSpecified: A没有配置表。使用A.table_name=来设置一个。
    /Users/<username>/.rvm/gems/ruby-2.7.2/gems/activerecord-7.0.6/lib/active_record/model_schema.rb:577:in `load_schema!'

我尝试在模型文件中添加A.table_name=nil。
我尝试在测试文件中添加A.abstract_class=true。

<details>
<summary>英文:</summary>

I have two related classes:

class A < ApplicationRecord
self.abstract_class = true
...
end
class B < A
...
end

I want to test that class B can be created:

class BTest < ActiveSupport::TestCase
test "can create B" do
record = B.create!
assert record.valid?
end
end

However it seems like the test suite does not understand that A is an abstract class. It gives me the following error:

BTest#test_can_create_b:
ActiveRecord::TableNotSpecified: A has no table configured. Set one with A.table_name=
/Users/<username>/.rvm/gems/ruby-2.7.2/gems/activerecord-7.0.6/lib/active_record/model_schema.rb:577:in `load_schema!'

I tried adding A.table_name=nil in the model file.
I tried adding A.abstract_class=true in the test file.

</details>


# 答案1
**得分**: 1

你可能在你的`test/fixtures`中有一个多余的`as.yml`固定装置，所以测试套件正在尝试填充它并抛出错误。

<details>
<summary>英文:</summary>

You probably have a leftover `as.yml` fixture in your `test/fixtures`, so the test suite is trying to populate that and throwing the error.

</details>