Current sync

app/controllers/money_moves_controller.rb

@@ -4,7 +4,7 @@ class MoneyMovesController < ApplicationController
   end
 
   def create
-   money_move = MoneyMove.new(money_move_params)
+   money_move = MoneyMove.create_move(money_move_params)
    if money_move.save
      json_response(money_move)
    else

app/models/homie.rb

@@ -1,14 +1,12 @@
 class Homie < ApplicationRecord
-  has_many :money_moves_from, class_name: 'MoneyMove', foreign_key: :from_homie_id
-  has_many :money_moves_to, class_name: 'MoneyMove', foreign_key: :to_homie_id
+  has_many :money_moves
 
   def self.cash(importance)
-    got = Homie.all.joins(:money_moves_to).group(:id).order(:id).sum(:amount)
-    owe = Homie.all.joins(:money_moves_from).group(:id).order(:id).sum(:amount)
+     totals = Homie.all.joins(:money_moves).group(:id).order(:id).sum(:amount)
 
     result = [] 
     Homie.where(["importance > ?", importance]).map do |homie|
-      total = got.fetch(homie.id, 0) - owe.fetch(homie.id,0)
+      total = totals.fetch(homie.id, 0) 
       { homie: homie, amount: total } 
     end
   end

app/models/money_move.rb

@@ -1,4 +1,25 @@
 class MoneyMove < ApplicationRecord
-  belongs_to :from_homie, class_name: 'Homie'
-  belongs_to :to_homie, class_name: 'Homie'
+  belongs_to :homie
+
+  def create_move(params)
+    common_params = { description: params[:description] } 
+
+    move_from = MoneyMove.new(
+      common_params + { 
+        homie_id: params[:from_homie_id],
+        amount: -BigDecimal.new(params[:amount])   
+      } 
+    )
+    move_to = MoneyMove.new(
+      common_params + { 
+        homie_id: params[:from_homie_id],
+        amount: BigDecimal.new(params[:amount])
+      }
+    )
+
+    MoneyMove.transaction do 
+      move_from.save!
+      move_to.save!
+    end
+  end
 end