FreeSql （七）插入数据时忽略列

时间 2019-11-05 标签 freesql 插入数据忽略

var connstr = "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;" + 
    "Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=10";

IFreeSql fsql = new FreeSql.FreeSqlBuilder()
    .UseConnectionString(FreeSql.DataType.MySql, connstr)
    .UseAutoSyncStructure(true) //自动同步实体结构到数据库
    .Build();

[Table(Name = "tb_topic")]
class Topic {
    [Column(IsIdentity = true, IsPrimary = true)]
    public int Id { get; set; }
    public int Clicks { get; set; }
    public string Title { get; set; }
    public DateTime CreateTime { get; set; }
}

var items = new List<Topic>();
for (var a = 0; a < 10; a++) items.Add(new Topic { Id = a + 1, Title = $"newtitle{a}", Clicks = a * 100 });

忽略列

fsql.Insert<Topic>(items).IgnoreColumns(a => a.CreateTime).ExecuteAffrows();

执行SQL以下：html

INSERT INTO `tb_topic`(`Clicks`, `Title`) VALUES(?Clicks0, ?Title0), (?Clicks1, ?Title1), (?Clicks2, ?Title2), (?Clicks3, ?Title3), (?Clicks4, ?Title4), (?Clicks5, ?Title5), (?Clicks6, ?Title6), (?Clicks7, ?Title7), (?Clicks8, ?Title8), (?Clicks9, ?Title9)

fsql.Insert<Topic>(items).IgnoreColumns(a => new { a.Title, a.CreateTime }).ExecuteAffrows();

执行SQL以下：sql

INSERT INTO `tb_topic`(`Clicks`) VALUES(?Clicks0), (?Clicks1), (?Clicks2), (?Clicks3), (?Clicks4), (?Clicks5), (?Clicks6), (?Clicks7), (?Clicks8), (?Clicks9)

API

方法	返回值	参数	描述
AppendData	<this>	T1 \| IEnumerable	追加准备插入的实体
InsertIdentity	<this>	无	指明插入自增列
InsertColumns	<this>	Lambda	只插入的列
IgnoreColumns	<this>	Lambda	忽略的列
WithTransaction	<this>	DbTransaction	设置事务对象
ToSql	string		返回即将执行的SQL语句
ExecuteAffrows	long		执行SQL语句，返回影响的行数
ExecuteIdentity	long		执行SQL语句，返回自增值
ExecuteInserted	List<T1>		执行SQL语句，返回插入后的记录

FreeSql （七）插入数据时忽略列

忽略列

API

系列文章导航