MongoDB学习笔记~自己封装的Curd操作(查询集合对象属性,更新集合对象)

时间:2021-07-12 19:10:12

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我不得不说,mongodb官方驱动在与.net结合上做的不是很好,不是很理想,所以,我决定对它进行了二次封装,这是显得很必然了,每个人都希望使用简单的对象,而对使用复杂,麻烦,容易出错的对象尽而远之,这是正常的,人都是喜欢懒惰的,就像程序员,也是一样,喜欢偷懒,可能说,偷懒是程序员进步的一个标志,呵呵.

下面我是总结的几种标准的操作,主要是针对我封装的官方驱动而方的(MongoOfficialRepository<TEntity>)

1  插入对象和子对象

        /// <summary>
/// 添加对象
/// </summary>
static public void Insert()
{
List<Person> list = new List<Person>();
for (int i = ; i < ; i++)
{
//添加新对象 list.Add(new Person
{
Address = new Address
{
City = "北京",
District = "鸾翔凤集",
Province = "luanxian",
},
AddList = new List<Address>
{
new Address
{
Seconds=,
City = "湖北",
District = "鸾翔凤集",
Province = "luanxian",
},
new Address
{
Seconds=,
City = "湖南",
District = "小区",
Province = "luanxian",
}
},
Age = ,
Birthday = DateTime.Now,
LastContact = DateTime.Now,
Name = "wangwu"
});
}
repository1.Insert(list);
}

2 更新对象和子对象集合元素,这是非常不错的功能,对于没有必要更新的记录,可以不去为它赋值

        /// <summary>
/// 集合查询
/// </summary>
static public void Update()
{
repository1.Update<Person>(i => new Person
{
Id = "556bfd1b2683c82060c2edd0",
AddList = new List<Address>
{
new Address
{
Id = "556bfd1b2683c82060c2edd3",
City = "占占大师123",
District = "鸾翔凤集",
Seconds=
}
}
});
}

3 分页,多字段查询和排序,这是项目开发中用的最多的东西了,写了个标准的给大家参考

        /// <summary>
/// 分页,排序,查询
/// </summary>
static public void Select()
{
//排序和检索
var m1 = repository1.GetModel(new
{
Address = new
{
City = "北京"
},
AddList = new
{
Seconds =
}
}, new { Name = OrderType.Desc }, , );

4 分组,对于需要按着按些字段进行聚合(统计,求和,总数,最大值,最小值等),及多条件查询,这里有不错的实例

        /// <summary>
/// 分组
/// </summary>
static public PagedList<Person> Group(string keyword, int? age, int page)
{
Specification<Person> spec = new TrueSpecification<Person>(); //过滤
if (!string.IsNullOrWhiteSpace(keyword))
{
spec &= new DirectSpecification<Person>(i => i.Name == keyword);
} if (age.HasValue)
{
spec &= new DirectSpecification<Person>(i => i.Age == age);
} //分组
var linq = from data1 in repository1.GetModel().Where(spec.SatisfiedBy())
group data1 by new
{
data1.Id,
data1.Name
} into g
select new Person
{
Id = g.Key.Id,
Name = g.Key.Name,
Total = new Total
{
Count = g.Count(),
Max = g.Max(i => i.Age),
} };
return new PagedList<Person>(linq, page, );
}

OK,以上是针对我的MongoDB仓储进行的一些二次说明,感觉还是比较有必要的,呵呵.

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