Rails order active records with assign_attributes - ruby

Question

I have a User model which has a Scoring model which has a score value.
In my rails view I want to make an order of my users by score.
=> User.joins (: scoring) .order (: score)
So far, so good.
it gets complicated when I would dynamically change the score of some User without modifying them in the database according to certain attributes such as geolocation.
I tried the assign_attributes function but it does not change because the .order function calls the score fields in the database.
Use case: I do a user search by geolocation and the users near the geolocation appear in my search with their scores. I would like to weight the scores of users nearby since they are not on the exact geolocation
My code:
#Get scoring in other geolocation
#fiches_proxi = Fiche.joins(:user).merge(User.joins(:scoring)).near([#geo.lat_long_DMS.to_f, #geo.lat_long_grd.to_f], proxi_calcule(#geo.population_2012.to_i),units: :km, :order => 'scorings.score DESC').order('scorings.score DESC').where.not(geo: #geo.id).limit(10)
#Get scoring in real geolocation
#fiche_order_algo_all = Fiche.joins(:user).merge(User.joins(:scoring)).where(geo_id: #geo)
#Find all scores
#fiches_all = Fiche.where(id: #fiche_order_algo_all.pluck(:id) + #fiches_proxi.pluck(:id))
#pagy, #fiche_order_algo = pagy(#fiches_all.joins(:user).merge(User.joins(:scoring).order('scorings.score DESC')), items: 12)
#fiche_order_algo.each do |f|
if f.geo.id != #geo.id
f.user.scoring.assign_attributes(score: (f.user.scoring.score - 10.0))
else
f.user.scoring.score
end
end
My score is updated but my order is the same !

Answer 1

When you call .each on your relation, it returns an array, so you can use Array#sort_by
#fiche_order_algo.each do |f|
if f.geo.id != #geo.id
f.user.scoring.assign_attributes(score: (f.user.scoring.score - 10.0))
else
f.user.scoring.score
end
end
#fiche_order_algo.sort_by!{|f| f.scoring.score}
If you're working with large data sets, this might not be optimized, but won't be any less efficient than what you already have.
But you can also do it in one go with:
#fiche_order_algo.sort_by! do |f|
if f.geo.id != #geo.id
f.user.scoring.assign_attributes(score: (f.user.scoring.score - 10.0))
end
f.user.scoring.score
end