added sqlite query result and enhanced column generator and value extractor

test/models/category.hpp

@@ -0,0 +1,25 @@
+#ifndef QUERY_CATEGORY_HPP
+#define QUERY_CATEGORY_HPP
+
+#include "matador/utils/access.hpp"
+
+#include <string>
+
+namespace matador::test {
+
+struct category
+{
+  unsigned long id{};
+  std::string name;
+
+  template<class Operator>
+  void process(Operator &op) {
+    namespace field = matador::utils::access;
+    using namespace matador::utils;
+    field::primary_key(op, "id", id);
+    field::attribute(op, "name", name, 255);
+  }
+};
+
+}
+#endif //QUERY_CATEGORY_HPP

test/models/product.hpp

@@ -0,0 +1,46 @@
+#ifndef QUERY_PRODUCT_HPP
+#define QUERY_PRODUCT_HPP
+
+#include "category.hpp"
+#include "supplier.hpp"
+
+#include "matador/utils/access.hpp"
+#include "matador/utils/cascade_type.hpp"
+#include "matador/utils/field_attributes.hpp"
+
+#include "matador/sql/foreign.hpp"
+
+#include <string>
+
+namespace matador::test {
+
+struct product
+{
+  std::string product_name;
+  sql::foreign<test::supplier> supplier;
+  sql::foreign<test::category> category;
+  std::string quantity_per_unit;
+  unsigned int unit_price;
+  unsigned int units_in_stock;
+  unsigned int units_in_order;
+  unsigned int reorder_level;
+  bool discontinued;
+
+  template<class Operator>
+  void process(Operator &op) {
+    namespace field = matador::utils::access;
+    using namespace matador::utils;
+    field::primary_key(op, "product_name", product_name, 255);
+    field::has_one(op, "supplier_id", supplier, utils::cascade_type::ALL);
+    field::has_one(op, "category_id", category, utils::cascade_type::ALL);
+    field::attribute(op, "quantity_per_unit", quantity_per_unit, 255);
+    field::attribute(op, "unit_price", unit_price);
+    field::attribute(op, "units_in_stock", units_in_stock);
+    field::attribute(op, "units_in_order", units_in_order);
+    field::attribute(op, "reorder_level", reorder_level);
+    field::attribute(op, "discontinued", discontinued);
+  }
+};
+}
+
+#endif //QUERY_PRODUCT_HPP

test/models/supplier.hpp

@@ -0,0 +1,25 @@
+#ifndef QUERY_SUPPLIER_HPP
+#define QUERY_SUPPLIER_HPP
+
+#include "matador/utils/access.hpp"
+
+#include <string>
+
+namespace matador::test {
+
+struct supplier
+{
+  unsigned long id{};
+  std::string name;
+
+  template<class Operator>
+  void process(Operator &op) {
+    namespace field = matador::utils::access;
+    using namespace matador::utils;
+    field::primary_key(op, "id", id);
+    field::attribute(op, "name", name, 255);
+  }
+};
+
+}
+#endif //QUERY_SUPPLIER_HPP