Rails UNIQ method not working - Rails 4

Question

i am trying to use the rails helper method uniq but unsure why it is not working. Your help would be much appreciated

• i have a list of application forms eg:3 forms
• 2 of the application forms are by women and 1 is by a man
• The 2 application forms are by the same woman
• @forms.count = 3
• @forms.female_applicants.count = 2
• @forms.female_applicants.uniq.count = gives me 2 but the answer should be 1

Model

• Form belongs to a user
• User has many forms
• User belongs to category_gender
• Category_gender has many users

Form.rb

scope :female_applicants, ->() { joins(:category_gender).where('category_genders.name' => "Female") }

My Question: If the same woman has 2 forms, could one kindly advise me how to display the number of forms uniquely as 1 rather than 2. so when queried @forms.female_applicants.uniq.count the result will be 1 and not 2 if there is a better way than using the uniq method i would very much appreciate if told

Answer 1

@Dan & @hypern you were right - there were non-unique elements present which was why i could not use the rails method uniq

using @forms.female_applicants.group_by(&:user).count resulted in the answer i was looking for

many thanks