I have two tables to join. The joining condition is a column that should be like or starts with the other column, not exactly equal. How to do that in Linq? This is my function:
public async Task<List<GetAllPackagesWithCamundaTaskOutput>> GetAllWithCamundaTaskForCarrierAsync(GetPackageInput input)
{
try
{
var dbSet = await GetDbSetAsync();
// Fetch IQueryable<RuTasks> by awaiting the task
var ruTasksQueryable = await _ruTasksRepository.GetQueryableAsync();
var tasks = await _tasksRepository.GetQueryableAsync();
var passportPackageId = new GetPassportInput
{
PackageId = input.Id
};
var getPaspportCarrierTypeStmt = await _passportRepository.GetPassportCarrierTypeAsync(passportPackageId);
// Fetch distinct user IDs from the filtered ruTasks
var userIds = ruTasksQueryable.Where(rt => rt.AssignedUserId.HasValue && rt.AssignedUserId != Guid.Empty)
.Select(rt => rt.AssignedUserId.Value)
.Distinct()
.ToList();
// Get user info from the userInfo service
var userInfoList = await _userInfoManager.GetUserInfo(new getUserInfoInput
{
Ids = userIds.Cast<Guid?>().ToList(),
JWT = _httpContextAccessor.HttpContext.Items["UserToken"]?.ToString()
});
// Convert the userInfoList to a dictionary for efficient lookup
var userInfoDict = userInfoList.ToDictionary(user => user.Id);
// Fetch the necessary data from the database
var packages = await dbSet.ToListAsync();
// Join data in memory
var query = from p in packages
join rt in ruTasksQueryable.Where(rt => rt.PackageBusinessId.StartsWith(p.Id)) on p.Id equals !rt.PackageBusinessId.Equals(p.Id) into rtGroup
from rt in rtGroup.DefaultIfEmpty()
join t in tasks on rt?.TasksId equals t.Id into tGroup
from t in tGroup.DefaultIfEmpty()
join user in userInfoList on rt?.AssignedUserId equals user.Id into userGroup
from user in userGroup.DefaultIfEmpty()
join pct in getPaspportCarrierTypeStmt on p.Id equals pct.PackageId into pctGroup
from pct in pctGroup.DefaultIfEmpty()
orderby p.LastModificationTime descending
select new GetAllPackagesWithCamundaTaskOutput
{
ShortId = p.ShortId,
PackageId = p.Id,
PackageBusinessId = rt?.PackageBusinessId,
PassportCount = p.PassportCount,
PackageStatusName = p.PackageStatus,
PackageReceivedAt = p.CreationTime,
PackageLastUpdated = p.LastModificationTime,
CamundaTaskId = rt?.Id,
AssignedGroupId = rt?.AssignedGroupId,
AssignedUserId = rt?.AssignedUserId,
AssignedUser = user?.FirstName + " " + user?.LastName,
AssignedUsername = user?.Username,
PhaseName = rt?.TasksId,
CountPassports = pct?.CountPassports,
CountSmsa = pct?.CountSMSA,
CountSpl = pct?.CountSPL
};
// Apply additional filters and execute the query
query = GetAllWithCamundaTaskForCarrierAsyncApplyFilters(query, input);
var result = query.ToList();
return result;
}
catch (Exception ex)
{
_logger.LogError(ex, "An error occurred in GetAllWithCamundaTaskForCarrierAsync");
throw new Exception("An internal error occurred during your request. Please try again later.");
}
}
Here is the joining condition that I want to fix:
join rt in ruTasksQueryable.Where(rt => rt.PackageBusinessId.StartsWith(p.Id)) on p.Id equals !rt.PackageBusinessId.Equals(p.Id) into rtGroup
Example: my p.Id = P__20240623_2KI9T while my rt.PackageBusinessId= P__20240623_2KI9T__SMSA
they are different by the suffix only, how can I join the two tables based on that???