expose first_reading_at in the api

app/lib/presenters/device_presenter.rb

@@ -13,7 +13,7 @@ def default_options
     end
 
     def exposed_fields
-      %i{id uuid name description state system_tags user_tags last_reading_at created_at updated_at notify device_token mac_address postprocessing location data_policy hardware owner components}
+      %i{id uuid name description state system_tags user_tags first_reading_at last_reading_at created_at updated_at notify device_token mac_address postprocessing location data_policy hardware owner components}
     end
 
     def notify

app/views/v0/devices/_device.jbuilder

@@ -12,6 +12,7 @@ json.(
   :state,
   :system_tags,
   :user_tags,
+  :first_reading_at,
   :last_reading_at,
   :created_at,
   :updated_at

spec/presenters/device_presenter_spec.rb

@@ -91,6 +91,10 @@
     expect(presenter.as_json[:user_tags]).to eq(device.user_tags)
   end
 
+  it "exposes the first_reading_at date" do
+    expect(presenter.as_json[:first_reading_at]).to eq(device.first_reading_at)
+  end
+
   it "exposes the last_reading_at date" do
     expect(presenter.as_json[:last_reading_at]).to eq(device.last_reading_at)
   end

spec/requests/v0/devices_spec.rb

@@ -24,7 +24,7 @@
       expect(json.length).to eq(2)
       # expect(json[0]['name']).to eq(first.name)
       # expect(json[1]['name']).to eq(second.name)
-      expect(json[0].keys).to eq(%w(id uuid name description state system_tags user_tags last_reading_at created_at updated_at notify device_token postprocessing location data_policy hardware owner data experiment_ids))
+      expect(json[0].keys).to eq(%w(id uuid name description state system_tags user_tags first_reading_at last_reading_at created_at updated_at notify device_token postprocessing location data_policy hardware owner data experiment_ids))
     end
 
     describe "when not logged in" do

spec/requests/v1/devices_spec.rb

@@ -25,7 +25,7 @@
       expect(json.length).to eq(2)
       # expect(json[0]['name']).to eq(first.name)
       # expect(json[1]['name']).to eq(second.name)
-      expect(json[0].keys).to eq(%w(id uuid name description state system_tags user_tags last_reading_at created_at updated_at notify device_token postprocessing location data_policy hardware owner data experiment_ids))
+      expect(json[0].keys).to eq(%w(id uuid name description state system_tags user_tags first_reading_at last_reading_at created_at updated_at notify device_token postprocessing location data_policy hardware owner data experiment_ids))
     end
 
     describe "when not logged in" do