relation_completer progress

include/matador/object/basic_object_info.hpp

@@ -12,6 +12,7 @@
 namespace matador::object {
 
 class schema_node;
+class relation_endpoint;
 
 class basic_object_info {
 public:
@@ -26,7 +27,7 @@ public:
   [[nodiscard]] const object_definition& definition() const;
   [[nodiscard]] std::shared_ptr<attribute_definition> reference_column() const;
 
-  bool has_primary_key() const;
+  [[nodiscard]] bool has_primary_key() const;
   [[nodiscard]] const utils::identifier& primary_key() const;
 
   void register_relation_endpoint(const std::type_index &type, const relation_endpoint &endpoint);

include/matador/object/many_to_many_relation.hpp

@@ -33,5 +33,30 @@ private:
     object_ptr<ForeignType> remote_;
 };
 
+template < class LocalType, class Type >
+class many_to_relation {
+public:
+    many_to_relation() = default;
+    many_to_relation(std::string local_name, std::string remote_name)
+    : local_name_(std::move(local_name))
+    , type_name_(std::move(remote_name)) {}
+
+    template<class Operator>
+    void process(Operator &op) {
+        namespace field = matador::access;
+        field::belongs_to(op, local_name_.c_str(), local_, utils::default_foreign_attributes);
+        field::attribute(op, type_name_.c_str(), value_);
+    }
+
+    object_ptr<LocalType> local() const { return local_; }
+    Type value() const { return value_; }
+
+private:
+    std::string local_name_;
+    std::string type_name_;
+    object_ptr<LocalType> local_;
+    Type value_;
+};
+
 }
 #endif //QUERY_HAS_MANY_TO_MANY_RELATION_HPP

include/matador/object/object_info.hpp

@@ -10,21 +10,33 @@ class schema_node;
 template<typename Type>
 class object_info final : public basic_object_info {
 public:
-  explicit object_info(const std::shared_ptr<schema_node>& node,
-                       std::shared_ptr<attribute_definition> &&ref_column)
+  using create_func = std::function<std::unique_ptr<Type>()>;
+
+  object_info(const std::shared_ptr<schema_node>& node,
+              std::shared_ptr<attribute_definition> &&ref_column)
   : basic_object_info(node, typeid(Type), {}, std::move(ref_column), {}) {
   }
-  explicit object_info(const std::shared_ptr<schema_node>& node,
-                       utils::identifier &&pk,
-                       std::shared_ptr<attribute_definition> &&ref_column,
-                       object_definition &&definition)
+  object_info(const std::shared_ptr<schema_node>& node,
+              utils::identifier &&pk,
+              std::shared_ptr<attribute_definition> &&ref_column,
+              object_definition &&definition)
   : basic_object_info(node, typeid(Type), std::move(pk), std::move(ref_column), std::move(definition)) {
   }
+  object_info(const std::shared_ptr<schema_node>& node,
+              utils::identifier &&pk,
+              std::shared_ptr<attribute_definition> &&ref_column,
+              object_definition &&definition,
+              create_func&& creator)
+  : basic_object_info(node, typeid(Type), std::move(pk), std::move(ref_column), std::move(definition))
+  , creator_(std::move(creator)){
+  }
 
   const Type &prototype() const { return prototype_; }
+  std::unique_ptr<Type> create() const { return creator_(); }
 
 private:
   Type prototype_;
+  create_func creator_{[]{ return std::make_unique<Type>(); }};
 };
 
 template<typename Type>

include/matador/object/object_ptr.hpp

@@ -45,6 +45,14 @@ private:
     utils::identifier pk_;
 };
 
+template<typename>
+struct is_object_ptr : std::false_type
+{};
+
+template<typename Type>
+struct is_object_ptr<object_ptr<Type>> : std::true_type
+{};
+
 }
 
 #endif //OBJECT_PTR_HPP

include/matador/object/relation_endpoint.hpp

@@ -1,12 +1,14 @@
 #ifndef MATADOR_RELATION_ENDPOINT_HPP
 #define MATADOR_RELATION_ENDPOINT_HPP
 
-#include "matador/object/schema_node.hpp"
-
 #include "matador/utils/enum_mapper.hpp"
 
+#include <memory>
+
 namespace matador::object {
 
+class schema_node;
+
 enum class relation_type : uint8_t {
   BELONGS_TO,
   HAS_ONE,

include/matador/object/schema.hpp

@@ -58,11 +58,11 @@ class relation_completer final {
 public:
   using value_type = Type;
 
-  static void prepare_expected_nodes(schema &scm) {
-    relation_completer analyzer(scm);
+  static void prepare_expected_nodes(schema_node &node) {
+    relation_completer completer(node);
 
     Type obj;
-    access::process(analyzer, obj);
+    access::process(completer, obj);
   }
 
   template < class PrimaryKeyType >
@@ -86,11 +86,12 @@ public:
   }
 
   template<class CollectionType>
-  void on_has_many(const char * /*id*/, CollectionType &, const char *, const utils::foreign_attributes &/*attr*/);
+  void on_has_many(const char *id, CollectionType &, const char *join_column, const utils::foreign_attributes &attr, std::enable_if_t<is_object_ptr<typename CollectionType::value_type>::value>* = nullptr );
+  template<class CollectionType>
+  void on_has_many(const char *id, CollectionType &, const char *join_column, const utils::foreign_attributes &attr, std::enable_if_t<!is_object_ptr<typename CollectionType::value_type>::value>* = nullptr );
 
   template<class CollectionType>
   void on_has_many_to_many(const char *id, CollectionType &collection, const char *join_column, const char *inverse_join_column, const utils::foreign_attributes &attr);
-
   template<class ContainerType>
   void on_has_many_to_many(const char *id, ContainerType &collection, const utils::foreign_attributes &attr);
 
@@ -99,14 +100,14 @@ private:
   void on_foreign_key();
 
 private:
-  explicit relation_completer(schema& schema, const std::shared_ptr<schema_node> &node)
-  : schema_(schema)
-  , node_(node){}
+  explicit relation_completer(schema_node& node)
+  : node_(node)
+  , schema_(node.schema_){}
 
 
 private:
-  schema &schema_;
-  std::shared_ptr<schema_node> node_;
+  schema_node &node_;
+  schema& schema_;
 };
 
 
@@ -134,9 +135,8 @@ public:
       type_index_node_map_.insert({node->type_index(), node});
     } else {
       // analyze node (collect unknown types by type index)
-      relation_completer<Type>::prepare_expected_nodes(*this);
-
       const auto node = schema_node::make_node<Type>(*this, name);
+      relation_completer<Type>::prepare_expected_nodes(*node);
       if (auto result = attach_node(node, parent); !result) {
         return utils::failure(result.err());
       }
@@ -245,8 +245,41 @@ private:
 
 template<typename Type>
 template<class CollectionType>
-void relation_completer<Type>::on_has_many( const char*, CollectionType&, const char*, const utils::foreign_attributes& ) {
+void relation_completer<Type>::on_has_many( const char *id, CollectionType&, const char *join_column, const utils::foreign_attributes&, std::enable_if_t<is_object_ptr<typename CollectionType::value_type>::value>* /*unused*/ ) {
+    using value_type = typename CollectionType::value_type;
 
+    // Process foreign key has many relation
+    // Check if foreign key type was already registered
+    auto result = schema_.find_node(typeid(value_type));
+    if (result) {
+    } else {
+        //
+        using relation_type = many_to_many_relation<value_type, Type>;
+        auto creator = [] {
+            return new many_to_many_relation<value_type, Type>();
+        };
+    }
+
+}
+
+template<typename Type>
+template<class CollectionType>
+void relation_completer<Type>::on_has_many( const char *id, CollectionType&, const char *join_column, const utils::foreign_attributes&, std::enable_if_t<!is_object_ptr<typename CollectionType::value_type>::value>* /*unused*/ ) {
+    using value_type = typename CollectionType::value_type;
+
+    // Process values has many relation
+    // Register relation table
+
+    // many_to_relation<Type, value_type> *relation = new many_to_relation<Type, value_type>(join_column, "value");
+    auto result = schema_.find_node(typeid(value_type));
+    if (result) {
+    } else {
+        //
+        using relation_type = many_to_many_relation<value_type, Type>;
+        auto creator = [] {
+            return new many_to_many_relation<value_type, Type>();
+        };
+    }
 
 }
 

include/matador/object/schema_node.hpp

@@ -17,7 +17,7 @@ public:
   using node_ptr = std::shared_ptr<schema_node>;
 
   template < typename Type >
-  static std::shared_ptr<schema_node> make_node(schema& tree, const std::string& name) {
+  static std::shared_ptr<schema_node> make_node(object::schema& tree, const std::string& name) {
     auto node = std::shared_ptr<schema_node>(new schema_node(tree, name));
 
     primary_key_resolver resolver;
@@ -34,7 +34,7 @@ public:
   }
 
   template < typename Type >
-  static std::shared_ptr<schema_node> make_relation_node(schema& tree, const std::string& name) {
+  static std::shared_ptr<schema_node> make_relation_node(object::schema& tree, const std::string& name) {
     auto node = std::shared_ptr<schema_node>(new schema_node(tree, name));
 
     auto info = std::make_unique<object_info<Type>>(
@@ -69,15 +69,19 @@ public:
       return std::ref(static_cast<const object_info<Type>&>(*info_));
   }
 
+  const object::schema& schema() const;
+
 private:
-  explicit schema_node(schema& tree);
-  schema_node(schema& tree, std::string name);
+  explicit schema_node(object::schema& tree);
+  schema_node(object::schema& tree, std::string name);
 
 private:
   friend class schema;
+  template <typename Type>
+  friend class relation_completer;
   friend class const_schema_node_iterator;
 
-  schema &schema_;
+  object::schema &schema_;
   std::unique_ptr<basic_object_info> info_;
 
   std::shared_ptr<schema_node> parent_;

source/core/CMakeLists.txt

@@ -15,6 +15,7 @@ add_library(matador-core STATIC
   ../../include/matador/object/object_proxy.hpp
   ../../include/matador/object/object_ptr.hpp
   ../../include/matador/object/primary_key_resolver.hpp
+  ../../include/matador/object/relation_endpoint.hpp
   ../../include/matador/object/schema.hpp
   ../../include/matador/object/schema_node.hpp
   ../../include/matador/object/schema_node_iterator.hpp
@@ -57,6 +58,7 @@ add_library(matador-core STATIC
   object/error_code.cpp
   object/object_definition.cpp
   object/primary_key_resolver.cpp
+  object/relation_endpoint.cpp
   object/schema.cpp
   object/schema_node.cpp
   object/schema_node_iterator.cpp
@@ -75,8 +77,6 @@ add_library(matador-core STATIC
   utils/uuid.cpp
   utils/value.cpp
   utils/version.cpp
-  ../../include/matador/object/relation_endpoint.hpp
-  object/relation_endpoint.cpp
 )
 
 target_link_libraries(matador-core ${CMAKE_DL_LIBS})

source/core/object/relation_endpoint.cpp

@@ -1,5 +1,7 @@
 #include "matador/object/relation_endpoint.hpp"
 
+#include "matador/object/schema_node.hpp"
+
 namespace matador::object {
 relation_endpoint::relation_endpoint(std::string field_name, relation_type type, const std::shared_ptr<schema_node> &node)
 : field_name_(std::move(field_name))

source/core/object/schema_node.cpp

@@ -3,11 +3,11 @@
 #include "matador/object/schema_node.hpp"
 
 namespace matador::object {
-schema_node::schema_node(schema &tree)
+schema_node::schema_node(object::schema &tree)
 : schema_(tree) {
 }
 
-schema_node::schema_node(schema &tree, std::string name)
+schema_node::schema_node(object::schema &tree, std::string name)
 : schema_(tree)
 , first_child_(std::shared_ptr<schema_node>(new schema_node(tree)))
 , last_child_(std::shared_ptr<schema_node>(new schema_node(tree)))
@@ -16,7 +16,7 @@ schema_node::schema_node(schema &tree, std::string name)
   last_child_->previous_sibling_ = first_child_;
 }
 
-std::shared_ptr<schema_node> schema_node::make_null_node(schema &tree) {
+std::shared_ptr<schema_node> schema_node::make_null_node(object::schema &tree) {
   auto node = std::shared_ptr<schema_node>(new schema_node(tree));
   node->info_ = std::make_unique<null_info>(node, std::shared_ptr<attribute_definition>{});
 
@@ -40,6 +40,10 @@ void schema_node::update_name(const std::string& name) {
   info_->reference_column()->name(name);
 }
 
+const object::schema& schema_node::schema() const {
+  return schema_;
+}
+
 schema_node::node_ptr schema_node::next() const {
   // if we have a child, child is the next iterator to return
   // (if we don't do iterate over the siblings)

test/core/object/SchemaTest.cpp

@@ -2,6 +2,8 @@
 
 #include "matador/object/schema.hpp"
 
+#include "../../models/department.hpp"
+
 struct node {};
 
 using namespace matador;
@@ -15,6 +17,16 @@ struct person {
 struct student final : person {};
 struct teacher final : person {};
 
+struct names {
+    std::vector<std::string> names_list;
+
+    template<typename Operator>
+    void process(Operator &op) {
+        namespace field = matador::access;
+        field::has_many(op, "name_list", names_list, "names_id", utils::fetch_type::EAGER);
+    }
+};
+
 TEST_CASE("Test empty prototype tree", "[schema_node][empty]") {
   const object::schema tree;
 
@@ -52,3 +64,21 @@ TEST_CASE("Test next and previous of schema node", "[schema_node][next][previous
   REQUIRE( (--it)->name() == "person" );
   REQUIRE( ++it == tree.end() );
 }
+
+TEST_CASE("Test automatic creating of a relation table with foreign key", "[schema][relation_table][foreign_key]") {
+  object::schema tree;
+
+  REQUIRE( tree.empty() );
+
+  auto res = tree.attach<test::department>("department");
+  REQUIRE( res.is_ok() );
+}
+
+TEST_CASE("Test automatic creating of a relation table with values", "[schema][relation_table][values]") {
+  object::schema tree;
+
+  REQUIRE( tree.empty() );
+
+  auto res = tree.attach<names>("names");
+  REQUIRE( res.is_ok() );
+}