added missing checks to QueryTest

backends/tests/QueryTest.cpp

@@ -456,43 +456,77 @@ TEST_CASE_METHOD(QueryFixture, "Select statement with many to many relationship"
   }
 
   auto result = db
-  .query(schema)
+    .query(schema)
-  .select({"r.id", "r.name", "ri.recipe_id"})
+    .select({"r.id", "r.name", "ri.ingredient_id"})
-  .from({"recipes", "r"})
+    .from({"recipes", "r"})
-  .join_left({"recipe_ingredients", "ri"})
+    .join_left({"recipe_ingredients", "ri"})
-  .on("r.id"_col == "ri.recipe_id"_col)
+    .on("r.id"_col == "ri.recipe_id"_col)
-  .fetch_all();
+    .fetch_all();
 
+  std::vector<std::tuple<unsigned long, std::string, unsigned long>> expected_result_one_join {
+    {7, "Apple Crumble", 1},
+    {7, "Apple Crumble", 4},
+    {7, "Apple Crumble", 5},
+    {8, "Beans Chili", 6},
+    {8, "Beans Chili", 7},
+    {9, "Fruit Salad", 1},
+    {9, "Fruit Salad", 2},
+    {9, "Fruit Salad", 3}
+  };
+  size_t index{0};
   for (const auto &r: result) {
     REQUIRE(r.size() == 3);
-    std::cout << "record r.id " << r.at(0).as<unsigned long>().value() << " r.name " << r.at(1).as<std::string>().value() << " ri.id " << r.at(2).as<unsigned long>().value() << "\n";
+    REQUIRE(r.at(0).as<unsigned long>().value() == std::get<0>(expected_result_one_join[index]));
+    REQUIRE(r.at(1).as<std::string>().value() == std::get<1>(expected_result_one_join[index]));
+    REQUIRE(r.at(2).as<unsigned long>().value() == std::get<2>(expected_result_one_join[index]));
+    ++index;
   }
 
   result = db
   .query(schema)
-  .select({"r.id", "r.name", "ri.recipe_id", "i.name"})
+  .select({"r.id", "r.name", "ri.ingredient_id", "i.name"})
   .from({"recipes", "r"})
   .join_left({"recipe_ingredients", "ri"}).on("r.id"_col == "ri.recipe_id"_col)
   .join_left({"ingredients", "i"}).on("ri.ingredient_id"_col == "i.id"_col)
   .fetch_all();
 
+  std::vector<std::tuple<unsigned long, std::string, unsigned long, std::string>> expected_result_two_joins {
+    {7, "Apple Crumble", 1, "Apple"},
+    {7, "Apple Crumble", 4, "Sugar"},
+    {7, "Apple Crumble", 5, "Flour"},
+    {8, "Beans Chili", 6, "Butter"},
+    {8, "Beans Chili", 7, "Beans"},
+    {9, "Fruit Salad", 1, "Apple"},
+    {9, "Fruit Salad", 2, "Strawberry"},
+    {9, "Fruit Salad", 3, "Pineapple"}
+  };
+  index = 0;
   for (const auto &r: result) {
     REQUIRE(r.size() == 4);
-    std::cout << "record r.id " << r.at(0).as<unsigned long>().value() << " r.name " << r.at(1).as<std::string>().value() << " ri.id " << r.at(2).as<unsigned long>().value() << " i.name " << r.at(3).as<std::string>().value() << "\n";
+    REQUIRE(r.at(0).as<unsigned long>().value() == std::get<0>(expected_result_two_joins[index]));
+    REQUIRE(r.at(1).as<std::string>().value() == std::get<1>(expected_result_two_joins[index]));
+    REQUIRE(r.at(2).as<unsigned long>().value() == std::get<2>(expected_result_two_joins[index]));
+    REQUIRE(r.at(3).as<std::string>().value() == std::get<3>(expected_result_two_joins[index]));
+    ++index;
   }
 
   result = db
   .query(schema)
-  .select({"r.id", "r.name", "ri.recipe_id", "i.name"})
+  .select({"r.id", "r.name", "ri.ingredient_id", "i.name"})
   .from({"recipes", "r"})
   .join_left({"recipe_ingredients", "ri"}).on("r.id"_col == "ri.recipe_id"_col)
   .join_left({"ingredients", "i"}).on("ri.ingredient_id"_col == "i.id"_col)
   .where("r.id"_col == 8)
   .fetch_all();
 
+  index = 3;
   for (const auto &r: result) {
     REQUIRE(r.size() == 4);
-    std::cout << "record r.id " << r.at(0).as<unsigned long>().value() << " r.name " << r.at(1).as<std::string>().value() << " ri.id " << r.at(2).as<unsigned long>().value() << " i.name " << r.at(3).as<std::string>().value() << "\n";
+    REQUIRE(r.at(0).as<unsigned long>().value() == std::get<0>(expected_result_two_joins[index]));
+    REQUIRE(r.at(1).as<std::string>().value() == std::get<1>(expected_result_two_joins[index]));
+    REQUIRE(r.at(2).as<unsigned long>().value() == std::get<2>(expected_result_two_joins[index]));
+    REQUIRE(r.at(3).as<std::string>().value() == std::get<3>(expected_result_two_joins[index]));
+    ++index;
   }
 
   db.query(schema).drop().table("recipe_ingredients").execute();

include/matador/sql/column.hpp

@@ -23,9 +23,9 @@ struct column
   column(sql_function_t func, std::string name); // NOLINT(*-explicit-constructor)
   column(std::string table_name, std::string name, std::string as);
   column(std::string table_name, const char* name, std::string as);
-  column(table &t, const char* name, std::string as);
+  column(struct table &t, const char* name, std::string as);
 
-  bool equals(const column &x) const;
+  [[nodiscard]] bool equals(const column &x) const;
 
   column& as(std::string a);
 

include/matador/sql/column_definition.hpp

@@ -53,6 +53,15 @@ public:
   [[nodiscard]] const std::string& ref_table() const;
   [[nodiscard]] const std::string& ref_column() const;
 
+  [[nodiscard]] bool is_integer() const;
+  [[nodiscard]] bool is_floating_point() const;
+  [[nodiscard]] bool is_bool() const;
+  [[nodiscard]] bool is_string() const;
+  [[nodiscard]] bool is_varchar() const;
+  [[nodiscard]] bool is_blob() const;
+  [[nodiscard]] bool is_null() const;
+  [[nodiscard]] bool is_unknown() const;
+
   void type(data_type_t type);
 
   template< typename Type >

src/sql/column_definition.cpp

@@ -63,6 +63,46 @@ const std::string &column_definition::ref_column() const
   return ref_column_;
 }
 
+bool column_definition::is_integer() const
+{
+  return type_ >= data_type_t::type_char && type_ <= data_type_t::type_unsigned_long_long;
+}
+
+bool column_definition::is_floating_point() const
+{
+  return type_ == data_type_t::type_float || type_ == data_type_t::type_double;
+}
+
+bool column_definition::is_bool() const
+{
+  return type_ == data_type_t::type_bool;
+}
+
+bool column_definition::is_string() const
+{
+  return type_ == data_type_t::type_text;
+}
+
+bool column_definition::is_varchar() const
+{
+  return type_ == data_type_t::type_varchar;
+}
+
+bool column_definition::is_blob() const
+{
+  return type_ == data_type_t::type_blob;
+}
+
+bool column_definition::is_null() const
+{
+  return type_ == data_type_t::type_null;
+}
+
+bool column_definition::is_unknown() const
+{
+  return type_ == data_type_t::type_unknown;
+}
+
 void column_definition::type(data_type_t type)
 {
   type_ = type;

test/models/author.hpp

@@ -15,6 +15,7 @@ struct author
   std::string date_of_birth;
   unsigned short year_of_birth{};
   bool distinguished{false};
+  std::vector<matador::sql::entity<book>> books;
 
   template<typename Operator>
   void process(Operator &op)
@@ -26,6 +27,7 @@ struct author
     field::attribute(op, "date_of_birth", date_of_birth, 31);
     field::attribute(op, "year_of_birth", year_of_birth);
     field::attribute(op, "distinguished", distinguished);
+    field::has_many(op, "books", books, "author_id", "id", utils::fetch_type::LAZY);
   }
 };
 

test/models/book.hpp

@@ -25,7 +25,7 @@ struct book
     namespace field = matador::utils::access;
     field::primary_key(op, "id", id);
     field::attribute(op, "title", title, 511);
-    field::has_one(op, "author_id", book_author, utils::fetch_type::EAGER);
+    field::belongs_to(op, "author_id", book_author, utils::fetch_type::EAGER);
     field::attribute(op, "published_in", published_in);
   }
 };

test/models/recipe.hpp

@@ -11,16 +11,19 @@
 
 namespace matador::test {
 
+struct recipe;
 struct ingredient
 {
   unsigned long id{};
   std::string name;
+  std::vector<matador::sql::entity<recipe>> recipes;
 
   template<class Operator>
   void process(Operator &op) {
     namespace field = matador::utils::access;
     field::primary_key(op, "id", id);
     field::attribute(op, "name", name, 255);
+    field::has_many(op, "recipes", recipes, "ingredient_id", "recipe_id", utils::fetch_type::EAGER);
   }
 };
 
@@ -28,12 +31,14 @@ struct recipe
 {
   unsigned long id{};
   std::string name;
+  std::vector<matador::sql::entity<ingredient>> ingredients;
 
   template<class Operator>
   void process(Operator &op) {
     namespace field = matador::utils::access;
     field::primary_key(op, "id", id);
     field::attribute(op, "name", name, 255);
+    field::has_many(op, "ingredients", ingredients, "recipe_id", "ingredient_id", utils::fetch_type::EAGER);
   }
 };