ntoskrnl7 / json-search-condition

json-search-condition

Contents

• json-search-condition
  • Contents
  • Dependencies
  • Usage
    • CMake
      • CMakeLists.txt
    • Examples
      • Scheme
      • SQLite

Dependencies

• ext
• nlohmann::json

Usage

CMake

CMakeLists.txt

cmake_minimum_required(VERSION 3.14 FATAL_ERROR)

# create project
project(MyProject)

# add executable
add_executable(tests tests.cpp)

# add dependencies
include(cmake/CPM.cmake)
CPMAddPackage("gh:ntoskrnl7/json-search-condition@0.1.0")

# link dependencies
target_link_libraries(tests jsc)

Examples

Scheme

• The search condition can be expressed as follows.

  {
      "sample0": // name = "test"
      {
          "field": "name",
          "operator": "=", // eq
          "value": "test"
      },
      "sample1": // name = "test" && age > 10
      [
          {
              "field": "name",
              "operator": "=",
              "value": "test"
          },
          {
              "field": "age",
              "operator": ">",
              "value": 10
          }
      ],
      "sample2": // name = "test" || age > 10
      {
          "group0": {
              "field": "name",
              "operator": "=", // eq
              "value": "test"
          },
          "group1": {
              "field": "age",
              "operator": ">", // gt
              "value": 10
          }
      },
      "sample4": // name in "dea"
      {
          "field": "city",
          "operator": "in", // contains, ctns
          "value": "dea"
      },
      "sample5": // age 20 ~ 30
      {
          "field": "age",
          "operator": "range", // BEETWEN
          "begin": 20,
          "end": 30
      },
      "sample3": // name in ("seoul", "daejeon", "daegu", "busan")
      {
          "field": "city",
          "operator": "range", // IN, contains, ctns
          "value": [
              "seoul",
              "daejeon",
              "daegu",
              "busan"
          ]
      }
  }
  

SQLite

#include <jsc/sql/sqlite.hpp>

...

sqlite3_exec(
    db, "SELECT * FROM user WHERE " +
            jsc::sqlite::to_string(
                {{"field", "name"}, {"operator", "="}, {"value", "test"}})
                .c_str());