Dapper allows you to map a single row to multiple objects. Dapper.Mapper figures out the relations between the different returned objects and automatically assigns them.
Example:
var sql = @"select * from Employee
inner join Department on Department.Id = Employee.DepartmentId";Instead of explicitly writing this:
var employee = connection.Query<Employee, Department, Employee>(sql, (employee, department) => { employee.Department = department; return employee;});Dapper.Mapper allows you to write this:
var employee = connection.Query<Employee, Department>(sql);