nodejs mogoogle操作mongodbデータベースパッケージ

/**
 *   Add  
 * @param model          
 * @param conditions      , {id:xxx}
 * @param callback     
 */
exports.addData = function (model, conditions, callback) {

    model.create(conditions, function (err, result) {
        if (err) {
            console.log(err);
            callback({success: 0, flag: "save data fail"});
        } else {
            console.log('save success');
            callback({success: 1, flag: "save data success"});
        }
    });

}

/**
 *   update  
 * @param model          
 * @param conditions      , {id:xxx}
 * @param update     {set{id:xxx}}
 * @param options
 * @param callback
 */
exports.updateData = function (model, conditions, update, options, callback) {

    model.update(conditions, update, options, function (error, result) {
        if (error) {
            console.log(error);
            callback({success: 0, flag: "update data fail"});
        } else {
            if (result.n != 0) {
                console.log('update success!');
                callback({success: 1, flag: "update data success"});
            } else {
                console.log('update fail:no this data!');
                callback({success: 0, flag: 'update fail:no this data!'});
            }
        }
    });
}

/**
 *   remove  
 * @param model
 * @param conditions
 * @param callback
 */
exports.removeData = function (model, conditions, callback) {

    model.remove(conditions, function (error, result) {
        if (error) {
            console.log(error);
            callback({success: 0, flag: "remove data fail"});
        } else {
            if (result.result.n != 0) {
                console.log('remove success!');
                callback({success: 1, flag: "remove data success"});
            } else {
                console.log('remove fail:no this data!');
                callback({success: 0, flag: 'remove fail:no this data!'});
            }

        }
    });
}

/**
 *   find        
 * @param model
 * @param conditions
 * @param fields         ，   ，        
 * @param options
 * @param callback
 */
exports.findData = function (model, conditions, fields, options, callback) {

    var sort = options.sort == undefined ? {_id:-1} : options.sort;
    delete options.sort;
    model.find(conditions, fields, options, function (error, result) {
        if (error) {
            console.log(error);
            callback({success: 0, flag: "find data fail"});
        } else {
            if (result.length != 0) {
                console.log('find success!');
                callback({success: 1, flag: "find data success", result: result});
            } else {
                console.log('find fail:no this data!');
                callback({success: 0, flag: 'find fail:no this data!'});
            }
        }
    }).sort(sort);
}

/**
 *   populate find  
 *      
 * @param model
 * @param conditions
 * @param path :The field need to be refilled （       ）
 * @param fields :select fields (name -_id,Separated by a space field,In front of the field name plus "-"said not filled in)
 * @param refmodel （     ， path  null）
 * @param options
 * @param callback
 */
exports.findDataPopulation = function (model, conditions, path, fields, refmodel, options, callback) {

    model.find(conditions).populate(path, fields, refmodel, options).exec(function (err, result) {
        if (err) {
            console.log(err);
            callback({success: 0, flag: 'population find data fail'});
        } else {
            if (result.length != 0) {
                console.log('population find success!');
                callback({success: 1, flag: 'population find data success', result: result});
            } else {
                console.log('population find fail:no this data!');
                callback({success: 0, flag: 'population find fail:no this data!'});
            }
        }
    });
}