Order results by distance

app/models/hub.rb

@@ -1,5 +1,9 @@
 class Hub < ApplicationRecord
   def self.by_local_authority(*authorities)
-    where("areas && ARRAY[?]::varchar[]", authorities)
+    result = []
+    authorities.each do |authority|
+      result << where("areas && ARRAY[?]::varchar[]", [authority]).to_a
+    end
+    result.flatten.uniq
   end
 end

spec/models/hub_spec.rb

@@ -0,0 +1,16 @@
+RSpec.describe Hub, type: :model do
+  before do
+    LocalAuthority::Importer.new.reload!
+    Hub::Importer.new.reload!
+  end
+
+  let(:authorities) { ["Birmingham", "Sandwell", "Dudley", "Bromsgrove", "Wyre Forest"] }
+  let(:hub_names) do
+    ["Ark Teaching School Hub", "Arthur Terry Teaching School Hub - North Birmingham",
+     "Haybridge Teaching School Hub", "Tudor Grange Teaching School Hub", "Prince Henry's Teaching School Hub"]
+  end
+
+  it "sorts results by distance" do
+    expect(described_class.by_local_authority(*authorities).map(&:name)).to eq(hub_names)
+  end
+end