module Ci
  class GroupVariable < ActiveRecord::Base
    extend Gitlab::Ci::Model
    include HasVariable
    include Presentable

    belongs_to :group

    alias_attribute :secret_value, :value

    validates :key, uniqueness: {
      scope: :group_id,
      message: "(%{value}) has already been taken"
    }

    scope :unprotected, -> { where(protected: false) }
  end
end

module Ci
  class GroupVariable < ActiveRecord::Base
    extend Gitlab::Ci::Model
    include HasVariable
    include Presentable

    belongs_to :group, class_name: "::Group"

    alias_attribute :secret_value, :value

    validates :key, uniqueness: {
      scope: :group_id,
      message: "(%{value}) has already been taken"
    }

    scope :unprotected, -> { where(protected: false) }
  end
end

Fix `undefined method 'arel_table' for Ci::Group:Class` error
[Rails5] Fix `undefined method 'arel_table' for Ci::Group:Class` error

Some specs fail in rails5 branch with errors like

```
1) Group#secret_variables_for when the ref is not protected contains only the secret variables
    Failure/Error: variables = Ci::GroupVariable.where(group: list_of_ids)

    NoMethodError:
      undefined method `arel_table' for Ci::Group:Class
```

This commit fixes it.
