deduplicar arduinos

app/controllers/readings_controller.rb

@@ -21,7 +21,7 @@ class ReadingsController < ActionController::API
       params[:arduinos]&.reject do |a|
         a[:id].blank? || a[:sensores].empty?
       end&.each do |a|
-        arduino = reading.arduinos.build local_id: a[:id], raspberry: raspberry
+        arduino = reading.arduinos.find_or_initialize_by(local_id: a[:id], raspberry: raspberry)
 
         a[:sensores].each do |s|
           arduino.sensors.build(sensor_params s)
@@ -73,7 +73,7 @@ class ReadingsController < ActionController::API
                                       :sample,
                                       :signature,
                                       coordinates: %i[lat lng]).tap do |p|
-                                        p[:timestamp] = Time.at p[:timestamp]
+                                        p[:timestamp] = Time.at p[:timestamp].to_i
                                       rescue TypeError
                                       end
   end

db/migrate/20220514213623_deduplicate_arduinos.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# Elimina arduinos multiplicados
+class DeduplicateArduinos < ActiveRecord::Migration[6.1]
+  def up
+    Raspberry.find_each do |raspberry|
+      unique_local_ids = raspberry.arduinos.distinct(:local_id).pluck(:local_id)
+
+      unique_local_ids.each do |unique_local_id|
+        arduinos = raspberry.arduinos.where(local_id: unique_local_id)
+        unique_arduino = arduinos.first
+        duplicated_arduinos = arduinos.where.not(id: unique_arduino.id)
+
+        result = Sensor.where(arduino_id: duplicated_arduinos.pluck(:id)).update_all(arduino_id: unique_arduino.id)
+        duplicated_arduinos.destroy_all if result
+      end
+    end
+  end
+
+  def down; end
+end