NET Core MongoDb Update/Replace exclude fields - mongodb

Question

I'm trying to complete a general repository for all of the entities in my application. I Have a BaseEntity with property Id, CreatorId and LastModifiedUserId. Now I'd like to Update a record in a collection, without having to modify the field CreatorId, so I have (from the client) an Entity valorized with some fields updated that I want to update.
Hi have 2 ways:
UpdateOneAsync
ReplaceOneAsync
The repo is created like this:
public class BaseRepository<T> : IRepository<T> where T : BaseEntity
{
public async Task<T> Replace/Update(T entity){...}
}
So it's very hard to use Update(1), since I should retrieve with reflection all the fields of T and exclude the ones that I don't want to update.
With Replace(2) I cannot find a way to specify which fields i should exclude when replacing an object with another. Projectionproperty in FindOneAndReplaceOptions<T>() just excludes the fields on the document that is returned after the update.
Am I missing a way in the replace method to exclude the fields or should I try to retrieve the fields with reflection and use a Update?

Answer 1

I don't know if this solution is ok for you .. what i do is :
Declare in Base Repo a method like
public virtual bool Update(TEntity entity, string key)
{
var result = _collection.ReplaceOne(x => x.Id.Equals(key), entity, new UpdateOptions
{
IsUpsert = false
});
return result.IsAcknowledged;
}
then in your controller when you want to update your entities is there where you set the prop you want to change .. like:
[HttpPut]
[ProducesResponseType(typeof(OrderDTO), 200)]
[ProducesResponseType(400)]
public async Task<ActionResult<bool>> Put([FromBody] OrderDTO value)
{
try
{
if (!ModelState.IsValid) return BadRequest(ModelState);
var orderOnDb = await _orderService.FindAsync(xx => xx.Id == value.Id);
if (orderOnDb == null) return BadRequest(Constants.Error.NOT_FOUND_ON_MONGO);
// SET PROPERTY TO UPDATE (MANUALLY)
orderOnDb.LastUpdateDate = DateTime.Now;
orderOnDb.PaymentMethod = value.PaymentMethod;
orderOnDb.StateHistory = value.StateHistory;
//Save on db
var res = await _orderRepo.UpdateAsync(orderOnDb, orderOnDb.Id);
return res;
}
catch (Exception ex)
{
_logger.LogCritical(ex, ex.Message);
throw ex;
}
}
Hope it helps you!!!