No longer erroneously creating schema tables for live aggregations re…

docs/documents/querying/linq/index.md

@@ -16,7 +16,7 @@ implements the traditional [IQueryable](https://msdn.microsoft.com/en-us/library
 /// <returns></returns>
 IMartenQueryable<T> Query<T>();
 ```
-<sup><a href='https://github.com/JasperFx/marten/blob/master/src/Marten/IQuerySession.cs#L137-L147' title='Snippet source file'>snippet source</a> | <a href='#snippet-sample_querying_with_linq' title='Start of snippet'>anchor</a></sup>
+<sup><a href='https://github.com/JasperFx/marten/blob/master/src/Marten/IQuerySession.cs#L142-L152' title='Snippet source file'>snippet source</a> | <a href='#snippet-sample_querying_with_linq' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 To query for all documents of a type - not that you would do this very often outside of testing - use the `Query<T>()` method like this:

docs/events/versioning.md

@@ -461,7 +461,7 @@ Some people prefer to use classes instead of pure functions. It may help encapsu
 
 ::: tip
 Note the base class used below has 2 generic arguments, the `Upcast()` method only exists
-on *this* base class
+on _this_ base class
 :::
 
 <!-- snippet: sample_upcaster_with_clr_types_and_event_type_name_from_old_type -->

src/EventSourcingTests/Bugs/Bug_3140_do_not_create_tables_for_live_aggregations.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading.Tasks;
+using EventSourcingTests.Aggregation;
+using Marten.Events.Aggregation;
+using Marten.Events.Projections;
+using Marten.Schema;
+using Marten.Storage;
+using Marten.Testing.Harness;
+using Shouldly;
+using Xunit;
+
+namespace EventSourcingTests.Bugs;
+
+public class Bug_3140_do_not_create_tables_for_live_aggregations : BugIntegrationContext
+{
+    [Fact]
+    public async Task should_not_create_tables_for_live_aggregations_when_registered_directly()
+    {
+        StoreOptions(opts =>
+        {
+            opts.Projections.Add(new MyAggregateProjection(), ProjectionLifecycle.Live);
+        });
+
+        await theStore.Storage.ApplyAllConfiguredChangesToDatabaseAsync();
+
+        var existingTables = await theStore.Storage.Database.SchemaTables();
+        existingTables.Any(x => x.QualifiedName == "bugs.mt_doc_aggregate").ShouldBeFalse();
+
+        var tables = theStore.Storage.AllObjects().OfType<DocumentTable>();
+        tables.ShouldNotContain(x => x.DocumentType == typeof(MyAggregate));
+    }
+}
+
+public class MyAggregateProjection: SingleStreamProjection<MyAggregate>
+{
+    public void Apply(MyAggregate aggregate, AEvent e) => aggregate.ACount++;
+}

src/Marten/Events/Projections/ProjectionOptions.cs

@@ -314,6 +314,12 @@ public void Add<T>(
 
         projection.AssembleAndAssertValidity();
 
+        if (lifecycle == ProjectionLifecycle.Live)
+        {
+            // Hack to address https://github.com/JasperFx/marten/issues/3140
+            _options.Storage.MappingFor(typeof(T)).SkipSchemaGeneration = true;
+        }
+
         All.Add(projection);
     }