Spliton in Dapper, ASP NET Core - asp.net-mvc

Question

string query = #"SELECT
l.LoginId,
l.Email,
un.UserNameId,
un.Name,
un.CPF,
un.CellPhone,
ga.GroupId,
ga.Name
FROM Tb_Login l
INNER JOIN Tb_UserName un
ON un.IdLogin = l.LoginId
INNER JOIN Tb_GroupAccess ga
ON ga.GroupId = l.IdGroupAccess
WHERE un.IdLogin = #Id
AND l.IdStatusLogin = 1";
var obj = _connection.Query<EmployeeResponse, Login, UserName, GroupAccess, EmployeeResponse>(
sql: query,
map: (loginResponse, login, userName, groupAcess) =>
{
loginResponse.Login = login;
loginResponse.UserName = userName;
loginResponse.GroupAccess = groupAcess;
return loginResponse;
},
splitOn: "UserNameId,GroupId",
param: new
{
Id = request.IdEmployee
}
).FirstOrDefault();
This code is returning:
System.ArgumentException: 'Multi-map error: splitOn column 'UserNameId' was not found - please ensure your splitOn parameter is set and in the correct order Arg_ParamName_Name'
I'm having problems trying to do this spliton.

Answer 1

As I stated in my comment: The first EmployeeResponse in the query shouldn't be there. It should say _connection.Query<Login, UserName, GroupAccess, EmployeeResponse> meaning: Map to Login, UserName and GroupAccess, return an EmployeeResponse. There is nothing in the query that can be mapped directly to EmployeeResponse
Therefore you also need to create the employee response yourself, so the code becomes something like:
var obj = _connection.Query<Login, UserName, GroupAccess, EmployeeResponse>(
sql: query,
map: (login, userName, groupAccess) =>
{
return new EmployeeResponse {
Login = login;
UserName = userName;
GroupAccess = groupAccess};
},
splitOn: "UserNameId,GroupId",
param: new
{
Id = request.IdEmployee
}
).FirstOrDefault();