Unitofwork update entity error Solution

When unitofwork is used to update an object, the following error is returned when the object is queried again:

Attaching an entity of type ‘TinyFrame.Data.DomainModel.t_user_application‘ failed because another entity of the same type already has the same primary key value. This can happen when using the ‘Attach‘ method or setting the state of an entity to ‘Unchanged‘ or ‘Modified‘ if any entities in the graph have conflicting key values. This may be because some entities are new and have not yet received database-generated key values. In this case use the ‘Add‘ method or the ‘Added‘ entity state to track the graph and then set the state of non-new entities to ‘Unchanged‘ or ‘Modified‘ as appropriate.

 

The solution is as follows:

    public virtual async Task<T> GetOne(Expression<Func<T,bool>> where) {            return await _dbSet.Where(where).AsNoTracking().FirstOrDefaultAsync();        }

If asnotracking is used, it can be updated without tracking.

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Unitofwork update entity error Solution