Fix admin page error when site has no property

app/models/site.rb

@@ -3,4 +3,5 @@ class Site < ActiveRecord::Base
   has_many :subsites
 
   validates :name, presence: true
+  validates :property, presence: true
 end

spec/features/entry_submission_spec.rb

@@ -1,8 +1,8 @@
 require 'rails_helper'
 
 RSpec.describe "submitting an individual entry", type: :feature do
-
-  let(:site) { Site.create! name: "test site", property_id: 22}
+  let(:property) { Property.create! }
+  let(:site) { Site.create! name: "test site", property_id: property.id}
 
   let(:sample) { observation.samples.create subsite_id: 33 }
   let(:observation ) { Observation.create site_id: site.id, protocol: protocol }

spec/models/site_spec.rb

@@ -1,4 +1,10 @@
 require 'rails_helper'
 
 RSpec.describe Site, type: :model do
+  it "model should fail validation if the property is missing" do
+    subject = Site.new
+    subject.name = "The Farm"
+    expect(subject.valid?).to equal false
+    expect(subject.errors.messages).to match({:property=>["can't be blank"]})
+  end
 end