{
    //rdbms: server type, postgresql,mysql or sqlite3
    "rdbms": "postgresql",
    //filename: sqlite3 db file name
    //"filename":"",
    //host: server address,localhost by default;
    "host": "127.0.0.1",
    //port: server port, 5432 by default;
    "port": 5432,
    //dbname: Database name;
    "dbname": "",
    //schema: valid for postgreSQL, "public" by default;
    "schema": "public",
    //user: User name
    "user": "",
    //password or passwd: Password
    "password": "",
    //client_encoding: The character set used by drogon_ctl. it is empty string by default which 
    //means use the default character set.
    //"client_encoding": "",
    //table: An array of tables to be modelized. if the array is empty, all revealed tables are modelized.
    "tables": [],
    //convert: the value can be changed by a function call before it is stored into database or
    //after it is read from database
    "convert": {
      "enabled": false,
      "items":[{
          "table": "user",
          "column": "password",
          "method": {
            //after_db_read: name of the method which is called after reading from database, signature: void([const] std::shared_ptr [&])
            "after_db_read": "decrypt_password",
            //before_db_write: name of the method which is called before writing to database, signature: void([const] std::shared_ptr [&])
            "before_db_write": "encrypt_password"
          },
          "includes": [
            "\"file_local_search_path.h\"","<file_in_global_search_path.h>"
          ]
      }]
    },
    "relationships": {
        "enabled": false,
        "items": [{
                "type": "has one",
                "original_table_name": "products",
                "original_table_alias": "product",
                "original_key": "id",
                "target_table_name": "skus",
                "target_table_alias": "SKU",
                "target_key": "product_id",
                "enable_reverse": true
            },
            {
                "type": "has many",
                "original_table_name": "products",
                "original_table_alias": "product",
                "original_key": "id",
                "target_table_name": "reviews",
                "target_table_alias": "",
                "target_key": "product_id",
                "enable_reverse": true
            },
            {
                "type": "many to many",
                "original_table_name": "products",
                "original_table_alias": "",
                "original_key": "id",
                "pivot_table": {
                    "table_name": "carts_products",
                    "original_key": "product_id",
                    "target_key": "cart_id"
                },
                "target_table_name": "carts",
                "target_table_alias": "",
                "target_key": "id",
                "enable_reverse": true
            }
        ]
    },
    "restful_api_controllers": {
        "enabled": false,
        // resource_uri: The URI to access the resource, the default value 
        // is '/*' in which the asterisk represents the table name.
        // If this option is set to a empty string, the URI is composed of the namespaces and the class name.
        "resource_uri": "/*",
        // class_name: "Restful*Ctrl" by default, the asterisk represents the table name.
        // This option can contain namespaces.
        "class_name": "Restful*Ctrl",
        // filters: an array of filter names.
        "filters": [],
        // db_client: the database client used by the controller. this option must be consistent with
        // the configuration of the application.
        "db_client": {
            //name: Name of the client,'default' by default
            "name": "default",
            //is_fast: 
            "is_fast": false
        },
        // directory: The directory where the controller source files are stored.
        "directory": "controllers",
        // generate_base_only: false by default. Set to true to avoid overwriting custom subclasses.
        "generate_base_only": false
    }
}