Comments (4)
In case someone is looking for this answer,
It's now possible to choose only column that will be part of the UPDATE
during a BulkMerge with the OnMergeUpdateInputExpression
option such as:
context.BulkMerge(list, options =>
{
options.OnMergeUpdateInputExpression = x => new { x.PhoneNumber, x.Address };
// options.OnMergeInsertInputExpression = x => new { x.ColumnString };
});
from dapper-plus.
Hello @Lajoh ,
We do not provide this options yet, we will look at it today.
Best Regards,
Jonathan
from dapper-plus.
Hello @Lajoh ,
We investigate this issue today but unfortunately didn't make it work yet with BulkMerge
.
However, you can easily handle this scenario with BulkUpdate
+ BulkInsert
(You must do BulkUpdate first to avoid to update inserted items).
Here is an example:
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Windows.Forms;
using Z.Dapper.Plus;
namespace Z.Lab
{
public partial class Form_Request_BulkMerge_ColumnOnly : Form
{
public Form_Request_BulkMerge_ColumnOnly()
{
DapperPlusManager.Entity<Person>("Insert_key")
.Table("Person")
.Key(x => x.PersonId)
.InsertIfNotExists();
DapperPlusManager.Entity<Person>("Update_key")
.Table("Person")
.Key(x => x.PersonId)
.Map(x => new {x.PhoneNumber, x.Address});
var list = new List<Person>();
for (var i = 0; i < 20; i++)
{
list.Add(new Person {PersonId = i, FirstName = "x_" + i, Address = "x_" + i, PhoneNumber = "x_" + i});
}
using (var conn = new SqlConnection(My.AppConfig.ConnectionStrings.DapperPlusConnection))
{
conn.Open();
conn.BulkUpdate("Update_key", list);
conn.BulkInsert("Insert_key", list);
}
InitializeComponent();
}
public class Person
{
public int PersonId { get; set; }
public string FirstName { get; set; }
public string PhoneNumber { get; set; }
public string Address { get; set; }
}
}
}
Let me know if this example can solve your problem.
Best Regards,
Jonathan
from dapper-plus.
Hello @Lajoh ,
This issue will be closed since it has been resolved.
Feel free to reopen it if you feel otherwise.
Best Regards,
Jonathan
from dapper-plus.
Related Issues (20)
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- BulkInsert Postgres => An error occured while retrieving the InformationSchemaTable information. See the inner exception for details. HOT 4
- Dapper Plus can't map Id when use galera cluster HOT 3
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