proxy lazy resolve progress

include/matador/orm/session.hpp

@@ -59,7 +59,7 @@ public:
       return utils::failure(make_error(error_code::UnknownType, "Failed to determine requested type."));
     }
 
-    session_query_builder eqb(*schema_);
+    session_query_builder eqb(*schema_, *this);
     auto data = eqb.build<Type>(pk);
     if (!data.is_ok()) {
       return utils::failure(make_error(error_code::FailedToBuildQuery, "Failed to build query for type " + info->get().name() + "."));
@@ -87,7 +87,7 @@ public:
       return utils::failure(make_error(error_code::UnknownType, "Failed to determine requested type."));
     }
 
-    session_query_builder eqb(*schema_);
+    session_query_builder eqb(*schema_, *this);
     auto data = eqb.build<Type>();
     if (!data.is_ok()) {
       return utils::failure(make_error(error_code::FailedToBuildQuery, "Failed to build query for type " + info->get().name() + "."));

include/matador/orm/session_query_builder.hpp

@@ -7,6 +7,7 @@
 #include "matador/query/query.hpp"
 
 #include "matador/sql/connection.hpp"
+#include "matador/sql/executor.hpp"
 
 #include "matador/object/join_columns_collector.hpp"
 #include "matador/object/schema.hpp"
@@ -28,11 +29,11 @@ struct entity_query_data {
   std::unique_ptr<query::basic_condition> where_clause{};
 };
 
-class session_query_builder final
-{
+class session_query_builder final {
 public:
-  explicit session_query_builder(const object::schema &scm)
-  : schema_(scm) {}
+  session_query_builder(const object::schema &scm, sql::executor &exec)
+  : schema_(scm)
+  , executor_(exec){}
 
   template<class EntityType, typename PrimaryKeyType>
   utils::result<entity_query_data, query_build_error> build(const PrimaryKeyType &pk) {
@@ -250,6 +251,7 @@ private:
   unsigned int column_index{0};
   unsigned int table_index{0};
   object::join_columns_collector join_columns_collector_;
+  sql::executor &executor_;
 };
 
 template<class Pointer>
@@ -287,7 +289,7 @@ void session_query_builder::on_foreign_object(const char *id, Pointer &, const u
     const auto result = matador::query::query::select<typename Pointer::value_type>(schema_)
       .from(*foreign_table)
       .where(sql::column(foreign_table, id, "") == _)
-      .com;
+      .prepare(executor_);
   }
 }