accounts.rb

# Read about factories at https://github.com/thoughtbot/factory_girl

FactoryGirl.define do
  factory :account do
    name "MyString"
    factory :account_with_projects do
      transient do
        projects_count 2
      end

      after(:create) do |account, evaluator|
        create_list(:project, evaluator.projects_count, account: account)
      end
    end
  end
end

exception.md

 Failure/Error: let(:user) { FactoryGirl.create :user }
 NoMethodError:
   undefined method `projects_count' for #<FactoryGirl::SyntaxRunner:0x007fb36a4a78b8>

user.rb

FactoryGirl.define do
  factory :user do
    name 'MyString'
    email 'email@email.com'
    password 'password'
    after(:build) do |user|
      user.password_confirmation = user.password
      user.confirm!
    end
    account_with_projects
  end
end

# Read about factories at https://github.com/thoughtbot/factory_girl

FactoryGirl.define do
  factory :account do
    name "MyString"
    trait :with_projects do
      transient do
        projects_count 2
      end

      after(:create) do |account, evaluator|
        create_list(:project, evaluator.projects_count, account: account)
      end
    end

    factory :account_with_projects, traits: [:with_projects]
  end
end