Set ColumnSynchronizeDeleteKeySubsetExpression without .Entity<Whatever>()? about dapper-plus

[JonathanMagnan]

Hello @VictorioBerra ,

When you use a syntax similar to this:

context.Entity<IEntityType>("mappingkey")
	.UseBulkOptions(options =>
	{
	});

The UseBulkOptions will only apply to this specific entity type whenever this key is used. It will not affect any other bulk operations but only those that use this exact mapping key.

Any configuration, in fact, should only apply only whenever you use this mappingkey and doesn't affect any other chained methods.

---

However, if you use the UseBulkOperations in the context such as:

context.UseBulkOptions(options => {}).BulkInsert

it will apply to all bulk operations that will be chained.

Let me know if that's more clear.

Best Regards,

Jon

[JonathanMagnan]

Hello @VictorioBerra

Can we have a feature to pass a string for the column name for ColumnSynchronizeDeleteKeySubsetExpression?

It should already be supported through the option ColumnSynchronizeDeleteKeySubsetNames, which allows you to pass a list of strings representing all the column names you want to use.

Also looks like I cannot apply UseBulkOptions() to ThenBulkMerge()? What is the best way to accomplish what I am trying to do above?

The connection.UseBulkOptions should be only for configurations like BatchSize that you don't mind applying to every bulk operation that chain after.

We usually recommend putting all custom options directly in the mapping and using a mapping key instead: https://dapper-plus.net/getting-started-mapping#mapper-key , which allows you to map an entity type in multiple different ways.

Let me know if you need more help with any of your two questions.

Best Regards,

Jon

[VictorioBerra]

@JonathanMagnan

Okay that answers my questions. UseBulkOptions() will apply to every chained Bulk operation.

I will switch to mapping keys since that seems less "global" and my mappings can apply directly to bulk operations.

Just some extra clarification, ColumnSynchronizeDeleteKeySubsetNames can only be applied via UseBulkOptions and cannot be set in mapping and used with mapping keys right? It applies to the entire bulk operation across all entities?

[VictorioBerra]

Makes sense to me. Thanks!