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README
LGPL-3.0

ccORM[version 1.6]

ccORM is the best ORM object relational mapping underlying library, which adopts the most philosophical, classic and minimalist design, low code and modular development, and friendly user experience. 🚀 Support Linux and Windows Platforms(Mac platform does not adapt string type detection temporarily), performance surpasses RTTI and protobuf and is compile time static reflection. As the name suggests, it is already an optimized machine code.

Benchmark results (not cached)

Advantage

  • powerful static reflection, maximum performance, minimum overhead, the fastest response, the easiest to maintain, and the low code
  • supports serializing objects or vector objects to strings, serializing objects to get JSON, and deserializing JSON format strings to objects
  • allows TM type, that is, date type (and serialization and deserialization of date type)
  • tolerate multithreading and high concurrency. SQLite supports dual threads, while MySQL and PgSQL support complete CPU threads
  • intelligent automatic table creation and deep binding between model classes and database is a function similar to decorator realized by macro
  • the function of automatically Ping the database at an interval, so that the database does not sleep and is always in the state of wake-up and recovery
  • add, delete, modify and query based on OOP. The insertion function also returns the new ID
  • surpassing RTTI and protobuf, it is the fastest and most violent idea similar to "dynamic type C++"
  • Provide DataMapper and ActiveRecord for curd
  • with compile time type detection
  • the VARCHAR data type is text<>
  • native types support unsigned type [for example: uint8_t, uint16_t, uint32_t, uint64_t]
  • Automatic table creation, global initialization, non intrusive
  • Add build macro for intermediate table M_TABLE
  • New the fastest developer mode, and the table will be rebuilt every time (note that it can only be used in the development environment!)
  • Loose boolean type deserialization, including but not limited to true, false, and 0, 1
  • Serialization and deserialization support loop nesting and loop dependency, as well as pointer structures
  • Supports one-to-one query, which can be as simple, elegant and convenient as JavaScript

Coming soon

Many to many queries, index columns, unique keys, and cache queries....

Model layer

class Tab;
class Type; D_M_TABLE(Type, Tab);


Class(Tab)
uint32_t id;
bool ok;
text<15> name;
tm date;
vector<Type> types;
Type* type;
Tab(uint32_t a = 0, bool b = false, const char* c = "", tm d = now(), vector<Type> e = {}, Type* f = nullptr) :
  id(a), ok(b), name(c), date(d), types(e), type(f) {}
~Tab() { type = nullptr; }
FIELD(id, ok, name, date)
CLASS(Tab, id, ok, name, date, types, type)
PROTO(Tab, id, ok, name, date)
REGIST(Tab,
  TC::PRIMARY_KEY | TC::AUTO_INCREMENT, "",
  TC::DEFAULT, "false",
  TC::DEFAULT, "ww'zzgg",
  TC::DEFAULT | TC::NOT_NULL, "");

Class(Type)
uint8_t id;
text<10> language;
double bigBlob;
vector<Tab> tabs;
Tab* tab;
Type(uint8_t a = 0, const char* b = "", double c = 0, vector<Tab> d = {}, Tab* e = nullptr) :
  id(a), language(b), bigBlob(c), tabs(d), tab(e) {}
~Type() { tab = nullptr; }
FIELD(id, language, bigBlob)
CLASS(Type, id, language, bigBlob, tabs, tab)
PROTO(Type, id, language, bigBlob)
REGIST(Type,
  TC::PRIMARY_KEY | TC::AUTO_INCREMENT, "",
  TC::DEFAULT, "c/c++",
  TC::EMPTY, "");
M_TABLE(Type, id, Tab, id)

Main function

#include "src/ccORM.hh"
auto D =
//D_mysql();
//D_pgsql();
D_sqlite("any.db");//Select database
#include "module.hpp"
void test() {
  Tab::ptr t = Tab::create(1, true, "Date change", now(), vector<Type>{ Type{ 1,"typescript" } });
  t->Update();//update
  t->set(5, false, "yield", now(), vector<Type>{ Type{ 1,"python" }, Type{ 2,"ruby" } }); cout << t << '\n';
  *t = json::parse(R"({"id":4,"ok":false,"name":"Flawless masterpiece","date":"2021-09-08 01:04:30","types":
[{"id":1,"language":"c++"},{"id":2,"tabs":[{"id":1,"name":"wtf!","ok":1}]},{"id":3,"language":"rust"}]})").get<Tab>();
  t->lang[1].language = "golang"; cout << t << '\n';//Loose boolean type deserialization, adding 0,1 support
  t->Insert();//insert, the return value is long long type
  cout << Tab::Q().GetArr();
  t->Delete();//delete
  *t = Tab::Q().where(Tab::$id == 1).GetOne(); cout << t << '\n';
}
int main() {
  clock_t start = clock(); test();
  Timer t; bool run = true;
  t.setTimeout([&run] {
	int i = 0; for (; i < 99999; ++i) {
	Tab::Q().where(Tab::$id == 2).GetOne(); } printf("<%d>", i);
	run = false;
	}, 6);
  int i = 0; for (; i < 98888; ++i) {
	Tab::Q().where(Tab::$id == 1).GetOne();
  }//Multithreading test
  printf("<%d>", i);
  while (run) { this_thread::yield(); }
  printf("\nuse %.6f seconds", (float)(clock() - start) / CLOCKS_PER_SEC);
  return 0;
}

Features

  • Modularization
  • Header files only
  • Low code
  • High performance

Premise

Cmake requirements: [it is best to install package with vcpkg]

mkdir build
cd build
cmake ..
cmake --build .

If the switch changes, perform the required switch options, eg:

cmake -DFastestDev=OFF -DIsDevMode=OFF --build ./
cmake -DFastestDev=OFF -DIsDevMode=ON --build ./
cmake -DFastestDev=ON -DIsDevMode=ON --build ./

then

cmake --build .

Or the following method corresponds to the above switch options. This is just an example. Note: please modify 'build' yourself_ linux. SH file Pass sh/ build_ linux. SH ` compile

g++ -DFastestDev=0 -DIsDevMode=0 ... In the online environment, the table will not be rebuilt
g++ -DFastestDev=0 -DIsDevMode=1 ... Do not re create the table (the table structure is not changed and can be used), and the development environment
g++ -DFastestDev=1 -DIsDevMode=1 ... Each time, the table will be rebuilt to develop the environment

Supported compilers(minimum version):

- Linux: G++ 9.2, Clang++ 9.0
- MacOS: Apple clang version 12.0.0 
- Windows: MSVC C++ compiler version 1930.

General naming rules

Constexpr -> lowercase + uppercase hump separation, and the last one is uppercase ending => nameBegiN
Static attribute -> _ Beginning, followed by all lowercase + underscore => _name_begin
Static global variables -> res_ Beginning, followed by all uppercase + underscore => RES_NAME_BEGIN
private Attribute -> lowercase + uppercase hump separation, _ Finishing => nameBegin_
public Attribute -> lowercase + uppercase hump separation => nameBegin
Parameter -> lowercase + underscore => name_begin
Special fields -> _ Beginning, separated by lowercase + underline in the middle, _ Finishing => _name_begin_
Struct or class -> starts with uppercase, followed by lowercase + uppercase, separated by hump => NameBegin
Macro or static constexpr -> uppercase + underscore => NAME_BEGIN

Attributions

ccORM uses the following libraries.

lithium

https://github.com/matt-42/lithium

Copyright (c) 2014 Matthieu Garrigues

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.


json 

https://github.com/nlohmann/json

Copyright (c) 2013-2021 Niels Lohmann
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
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编译期反射C++ORM,支持序列化与反序列化JSON,以及Sqlite、MySql、PostgreSql等类型数据库。(采用字符识别类型系统) expand collapse
C++ and 3 more languages
LGPL-3.0
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