sascha/query
1
0
Fork 0
Code Issues 4 Pull Requests Actions Packages Projects Releases Wiki Activity

added join_column_collector and implemented inverse has_many_to_many

Browse Source
This commit is contained in:
sascha
2024-04-14 22:12:48 +02:00
parent 7bb7afa227
commit fb57545cce
6 changed files with 206 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/matador/sql/entity_query_builder.hpp
+86 -18
View File
@@ -14,6 +14,49 @@
namespace matador::sql {
struct join_columns
{
std::string join_column;
std::string inverse_join_column;
};
class join_column_collector
{
public:
template<class Type>
join_columns collect()
{
join_columns_ = {};
Type obj;
matador::utils::access::process(*this, obj);
return join_columns_;
}
template < class V >
void on_primary_key(const char * /*id*/, V &, typename std::enable_if<std::is_integral<V>::value && !std::is_same<bool, V>::value>::type* = 0) {}
void on_primary_key(const char * /*id*/, std::string &, size_t) {}
void on_revision(const char * /*id*/, unsigned long long &/*rev*/) {}
template<typename Type>
void on_attribute(const char * /*id*/, Type &, const utils::field_attributes &/*attr*/ = utils::null_attributes) {}
template<class Pointer>
void on_belongs_to(const char * /*id*/, Pointer &obj, const utils::foreign_attributes &attr) {}
template<class Pointer>
void on_has_one(const char * /*id*/, Pointer &obj, const utils::foreign_attributes &attr) {}
template<class ContainerType>
void on_has_many(ContainerType &, const char *join_column, const utils::foreign_attributes &attr) {}
template<class ContainerType>
void on_has_many_to_many(const char * /*id*/, ContainerType &/*c*/, const char *join_column, const char *inverse_join_column, const utils::foreign_attributes &/*attr*/)
{
join_columns_.join_column = inverse_join_column;
join_columns_.inverse_join_column = join_column;
}
template<class ContainerType>
void on_has_many_to_many(const char * /*id*/, ContainerType &/*c*/, const utils::foreign_attributes &/*attr*/) {}
private:
join_columns join_columns_;
};
struct join_data
{
table join_table;
@@ -148,28 +191,52 @@ public:
template<class ContainerType>
void on_has_many_to_many(const char *id, ContainerType &c, const char *join_column, const char *inverse_join_column, const utils::foreign_attributes &attr)
{
if (attr.fetch() == utils::fetch_type::EAGER) {
const auto info = schema_.info<typename ContainerType::value_type::value_type>();
if (!info) {
throw query_builder_exception{query_build_error::UnknownType};
}
table_info_stack_.push(info.value());
typename ContainerType::value_type::value_type obj;
matador::utils::access::process(*this , obj);
table_info_stack_.pop();
auto pk = info->prototype.primary_key();
if (!pk) {
throw query_builder_exception{query_build_error::MissingPrimaryKey};
}
append_join({table_info_stack_.top().name, table_info_stack_.top().prototype.primary_key()->name()}, {id, join_column});
append_join({info->name, pk->name()}, {id, inverse_join_column});
if (attr.fetch() != utils::fetch_type::EAGER) {
return;
}
const auto info = schema_.info<typename ContainerType::value_type::value_type>();
if (!info) {
throw query_builder_exception{query_build_error::UnknownType};
}
table_info_stack_.push(info.value());
typename ContainerType::value_type::value_type obj;
matador::utils::access::process(*this , obj);
table_info_stack_.pop();
auto pk = info->prototype.primary_key();
if (!pk) {
throw query_builder_exception{query_build_error::MissingPrimaryKey};
}
append_join({table_info_stack_.top().name, table_info_stack_.top().prototype.primary_key()->name()}, {id, join_column});
append_join({info->name, pk->name()}, {id, inverse_join_column});
}
template<class ContainerType>
void on_has_many_to_many(const char *id, ContainerType &c, const utils::foreign_attributes &/*attr*/) {}
void on_has_many_to_many(const char *id, ContainerType &c, const utils::foreign_attributes &attr)
{
if (attr.fetch() != utils::fetch_type::EAGER) {
return;
}
const auto info = schema_.info<typename ContainerType::value_type::value_type>();
if (!info) {
throw query_builder_exception{query_build_error::UnknownType};
}
table_info_stack_.push(info.value());
typename ContainerType::value_type::value_type obj;
matador::utils::access::process(*this , obj);
table_info_stack_.pop();
auto pk = info->prototype.primary_key();
if (!pk) {
throw query_builder_exception{query_build_error::MissingPrimaryKey};
}
const auto join_columns = join_column_collector_.collect<typename ContainerType::value_type::value_type>();
append_join({table_info_stack_.top().name, table_info_stack_.top().prototype.primary_key()->name()}, {id, join_columns.join_column});
append_join({info->name, pk->name()}, {id, join_columns.inverse_join_column});
}
private:
template<class Pointer>
@@ -184,6 +251,7 @@ private:
const schema &schema_;
entity_query_data entity_query_data_;
int column_index{0};
join_column_collector join_column_collector_;
};
template<class Pointer>