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Merge pull request #109 from meysamhadeli/refactor/refactor_db_update_concurrency_exception

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refactor: Refactor handel DbUpdateConcurrencyException
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Meysam Hadeli 2023-01-21 03:55:21 +03:30 committed by GitHub
commit 9625878f9e
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1 changed files with 28 additions and 2 deletions
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30
src/BuildingBlocks/EFCore/AppDbContextBase.cs
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@ -75,10 +75,36 @@ public abstract class AppDbContextBase : DbContext, IDbContext
{
return base.SaveChangesAsync(cancellationToken);
}
//ref: https://learn.microsoft.com/en-us/ef/core/saving/concurrency?tabs=fluent-api#resolving-concurrency-conflicts
catch (DbUpdateConcurrencyException ex)
{
var data = ex.Entries.Single();
data.OriginalValues.SetValues(data.GetDatabaseValues() ?? throw new InvalidOperationException());
foreach (var entry in ex.Entries)
{
var proposedValues = entry.CurrentValues;
var databaseValues = entry.GetDatabaseValues();
if (databaseValues != null)
{
// update the original values with the database values
entry.OriginalValues.SetValues(databaseValues);
// check for conflicts
if (!proposedValues.Equals(databaseValues))
{
if (entry.Entity.GetType() == typeof(IAggregate))
{
// merge concurrency conflict for IAggregate
}
else
{
throw new NotSupportedException(
"Don't know how to handle concurrency conflicts for "
+ entry.Metadata.Name);
}
}
}
}
return base.SaveChangesAsync(cancellationToken);
}
}