如何使用 rails_admin_import gem 导入关联的 model？

Question

I'm trying to import my database, which have Project and Technology models (project has many technologies). Each project should have at least 1 technology. I use rails_admin_import gem for this task. As far as I understand, during project import gem is supposed to find associations of the model (technologies in my case) and connect them to model if they exist.

Everything is fine when I import technologies, but as soon as I'm importing projects, I receive this error for each of the projects:

Failed to create Project_1: Technologies minimum allowed: 1

I tried to import projects before importing technologies and after that, added to both of them mapping key, but nothing changed:

config.model 'Project' do
  import do
    mapping_key :name
    include_all_fields
  end
end
config.model 'Technology' do
  import do
    mapping_key :name
    include_all_fields
  end
end

Maybe anyone can help me and say what am I doing wrong?

UPD: The problem is that I exported data using default rails_admin export, which saves data in csv like that:

But rails_admin_import expects data in this format:

So I need to change my question. How should I configure rails_admin so that it would export data in a format accepted by rails_admin_import?

Answer 1

I found a way to do this, but probably not the best one.

I used before_import_associations method of rails_admin_import to create needed technologies key manually.

def before_import_associations(record)
  record[:technologies] = record[:name_technologies].split(',')
end