Could you help me write following scope: 

`Cv` belongs\_to `Student` and I want to write scope which gives me all cvs where student has at least one 
 education(`student.edcuations.any?`) and student is valid(have all attributes filled)

I want to write that scope for `Cv`.

*Models*

```
#cv.rb
belongs_to :student

#student.rb
has_many :cvs
has_many :educations

```