Many levels of relationship cause search by ' ' in string attribute using :eq

[cyruscavalcante]

class Model1
  has_many: :model2
end

class Model2
  belongs: :model1
  has_many: :model3
end

class Model3
  belongs: :model2
end

#datatable model3
 name: { source: "Model1.registration", cond: :eq, searchable: true, orderable: true },

#in SQL generate ex: searching by term ab01050
CAST("model1"."registration" AS VARCHAR) ILIKE '')