added belongs-to-eager test

test/models/airplane.hpp

@@ -6,27 +6,28 @@
 #include <string>
 
 namespace matador::test {
-
 struct airplane {
   airplane() = default;
+
   airplane(const unsigned int id, std::string b, std::string m)
   : id(id)
-  , brand(std::move(b))
-  , model(std::move(m)) {}
+    , brand(std::move(b))
+    , model(std::move(m)) {
+  }
+
   unsigned int id{};
   std::string brand;
   std::string model;
 
   template<class Operator>
   void process(Operator &op) {
-      namespace field = matador::access;
-      using namespace matador::utils;
-      field::primary_key(op, "id", id);
-      field::attribute(op, "brand", brand, 255);
-      field::attribute(op, "model", model, 255);
+    namespace field = matador::access;
+    using namespace matador::utils;
+    field::primary_key(op, "id", id);
+    field::attribute(op, "brand", brand, 255);
+    field::attribute(op, "model", model, 255);
   }
 };
-
 }
 
 // namespace matador::access {