tomasz.sowa/morm
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added basic support for making migrations

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This commit is contained in:
Tomasz Sowa
2021-05-14 03:24:53 +02:00
parent de4abeb91c
commit b12037a7e5
4 changed files with 170 additions and 3 deletions
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32
src/model.h
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@@ -86,6 +86,10 @@ public:
void set_connector(ModelConnector * connector);
ModelConnector * get_connector();
virtual void get_table_name(PT::WTextStream & stream, bool with_schema_name = true, ModelData * model_data = nullptr, bool clear_stream = true);
virtual void get_table_name(std::wstring & str, bool with_schema_name = true, ModelData * model_data = nullptr, bool clear_string = true);
virtual void get_table_name(std::string & str, bool with_schema_name = true, ModelData * model_data = nullptr, bool clear_string = true);
virtual void to_text(PT::TextStream & stream, ModelData * model_data, bool clear_stream = true, bool dump_mode = false);
virtual void to_text(PT::TextStream & stream, ModelData & model_data, bool clear_stream = true, bool dump_mode = false);
virtual void to_text(PT::TextStream & stream, bool clear_stream = true, bool dump_mode = false);
@@ -122,6 +126,9 @@ public:
// set object to default values
virtual void clear();
virtual bool do_migration(int & current_table_version);
// IMPROVE ME this will be protected
// add set_field_value() functions for each POD type
template<typename FieldValue>
@@ -210,6 +217,9 @@ protected:
virtual void map_values_from_query();
virtual bool db_query(const char * raw_sql);
virtual bool db_query(const std::string & raw_sql);
virtual bool db_query(const PT::TextStream & raw_sql);
/////////////////////////////////
/*
@@ -972,6 +982,28 @@ protected:
virtual void log_table_name(bool put_schema_name = true);
virtual void log_table_name_with_field(const wchar_t * db_field_name = nullptr, bool put_schema_name = true);
template<typename ModelObject>
bool do_migration(int & current_table_version, int destination_table_version, ModelObject * model_object, bool (ModelObject::*migration_function)())
{
bool status = true;
if( current_table_version < destination_table_version )
{
if( (model_object->*migration_function)() )
{
current_table_version = destination_table_version;
}
else
{
status = false;
}
}
return status;
}
template<typename ModelClass> friend class Finder;
template<typename ModelClass> friend class Cursor;
friend class BaseExpression;