Fix #5184: undefined method `to_model' for []:Array searching for IQDB queries with JSON.

test/functional/iqdb_queries_controller_test.rb

@@ -35,6 +35,19 @@ class IqdbQueriesControllerTest < ActionDispatch::IntegrationTest
           assert_select("#post_#{@post.id}")
         end
       end
+
+      context "with a file parameter" do
+        should "render a response" do
+          @matches = [{ post_id: @post.id, score: 95.0 }]
+          mock_iqdb_matches(@matches)
+
+          file = Rack::Test::UploadedFile.new("test/files/test.jpg")
+          post_auth iqdb_queries_path(format: :json), @user, params: { search: { file: file }}
+
+          assert_response :success
+          assert_equal([{ post_id: @post.id, score: 95.0, post: as(@user) { @post.as_json } }.with_indifferent_access], response.parsed_body)
+        end
+      end
     end
   end
 end