protected async Task <OperationResultOf <TEntity> > InternalTryGetSingleAsync(
DbContext dbSession,
TKey key,
bool trackChanges,
CancellationToken cancellation,
params Expression <Func <TEntity, object> >[] toBeIncluded)
{
var query = trackChanges ?
dbSession.Set <TEntity>().AppendIncludeExpressions(toBeIncluded) :
dbSession.Set <TEntity>().AsNoTracking().AppendIncludeExpressions(toBeIncluded);
var buildKeyPredicateOpRes = PrimaryKeyExpressionBuilder.TryBuildForSingleKey <TKey, TEntity>(dbSession, key);
if (!buildKeyPredicateOpRes)
{
return(buildKeyPredicateOpRes.ErrorMessage.AsFailedOpResOf <TEntity>());
}
var filterExpression = buildKeyPredicateOpRes.Value;
var foundEntity = await query.SingleOrDefaultAsync(filterExpression, cancellation)
.ConfigureAwait(false);
var success = foundEntity != null;
return(success
? foundEntity.AsSuccessfulOpRes()
: $"Failed to find '{key}' matching entity'".AsFailedOpResOf <TEntity>());
}
public void ValidSingleValueTypeKey_TryBuildForSingleKey_SuccessfulyBuilt()
{
//Arrange
var builder = new PrimaryKeyExpressionBuilder();
using var ctx = new MyDbContext();
//Act
var buildKeyPredicteOpres = builder.TryBuildForSingleKey <int, SingleValueTypeKeyEntity>(ctx, key: 1);
//Assert
Assert.IsTrue(buildKeyPredicteOpres, buildKeyPredicteOpres.ErrorMessage);
}