display measurement info within sensor on devices endpoint

app/controllers/v0/devices_controller.rb

@@ -6,15 +6,15 @@ class DevicesController < ApplicationController
 
     def show
       @device = Device.includes(
-        :owner, :sensors,:tags).find(params[:id])
+        :owner,:tags, {sensors: :measurement}).find(params[:id])
       authorize @device
       @device
     end
 
     def index
       raise_ransack_errors_as_bad_request do
         @q = policy_scope(Device)
-          .includes(:owner, :tags, :components, :sensors)
+          .includes(:owner, :tags, :components, {sensors: :measurement})
           .ransack(params[:q], auth_object: (current_user&.is_admin? ? :admin : nil))
 
         # We are here customly adding multiple tags into the Ransack query.

app/models/device.rb

@@ -213,8 +213,9 @@ def formatted_data
 
     components.sort_by {|c| c.sensor.name }.each do |component|
       sensor = component.sensor
-      sa = sensor.attributes.except(*%w{key equation reverse_equation})
+      sa = sensor.attributes.except(*%w{key equation reverse_equation measurement_id})
       sa = sa.merge(
+        measurement: sensor.measurement.for_sensor_json,
         value: (data ? data["#{sensor.id}"] : nil),
         prev_value: (old_data ? old_data["#{sensor.id}"] : nil),
         last_reading_at: component.last_reading_at
@@ -233,33 +234,6 @@ def self.geocode_all_without_location
     end
   end
 
-  def self.old_for_world_map(authorized=false)
-    where
-      .not(latitude: nil)
-      .where.not(data: nil)
-      .where(is_test: false)
-      .includes(:owner,:tags)
-      .map do |device|
-      {
-        id: device.id,
-        name: device.name,
-        description: (device.description.present? ? device.description : nil),
-        owner_id: device.owner_id,
-        owner_username: device.owner_id ? device.owner_username : nil,
-        latitude: device.latitude,
-        longitude: device.longitude,
-        city: device.city,
-        hardware: device.hardware(authorized),
-        country_code: device.country_code,
-        state: device.state,
-        system_tags: device.system_tags,
-        user_tags: device.user_tags,
-        updated_at: device.updated_at,
-        last_reading_at: (device.last_reading_at.present? ? device.last_reading_at : nil)
-      }
-    end
-  end
-
   def remove_mac_address_for_newly_registered_device!
     update(old_mac_address: mac_address, mac_address: nil)
   end

app/models/measurement.rb

@@ -3,4 +3,8 @@ class Measurement < ActiveRecord::Base
   has_many :sensors
   validates_presence_of :name, :description
   validates_uniqueness_of :name
+
+  def for_sensor_json
+    attributes.except(*%w{created_at updated_at})
+  end
 end