public async Task <IActionResult> Patch([FromBody] JsonPatchDocument <AppUser> patch)
{
//视频【65】
//有数组的情况下，更新有点复杂，
//1先删除原先的在做新增操作
//2.匹配后，在做关联操作，（不要跟踪数据）
var user = await _dbContext.AppUsers
.SingleOrDefaultAsync(x => x.Id == UserIdentity.UserId);
if (user == null)
{
throw new UserOperationException($"错误的用户上下文Id {UserIdentity.UserId}");
}
patch.ApplyTo(user);
foreach (var item in user?.Properties)
{
_dbContext.Entry(item).State = EntityState.Detached;
}
var currentPros = user.Properties;
var originPros = await _dbContext.AppUserProperties.AsNoTracking().Where(x => x.AppUserId == user.Id).ToListAsync();
var allPros = originPros.Union(currentPros).Distinct();
var removeRang = originPros.Except(currentPros);
_dbContext.RemoveRange(removeRang);
var addRang = allPros.Except(originPros);
using (var trans = await _dbContext.Database.BeginTransactionAsync())
{
//发布用户变更的消息
await RasieUserInfoChangedEventAsyncTask(user);
await _dbContext.AddRangeAsync(addRang);
await _dbContext.SaveChangesAsync();
trans.Commit();
}
return(Json(user));
}
public async Task CreateMany(List <T> entity)
{
if (entity != null)
{
await _context.AddRangeAsync(entity);
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateException ex)
{
_logger.LogError("Error saving data", ex);
throw new Exception("Error saving data", ex);
}
catch (Exception e)
{
_logger.LogError(e.Message);
throw;
}
}
}