Orchard CMS: How to add a Taxonomy field to a Content Type on a migration?

Question

I need to define a new Content Type having a Taxonomy field on my module's migrations. I guess I need to do something like this:

ContentDefinitionManager.AlterTypeDefinition("ContentTypeName",
            cfg => cfg
                .WithPart("TermsPart", builder => builder
                    .WithSetting(...

But I could not make it work.

Answer 1

I finally made it thanks to Giscard's answer. The important thing to know about Orchard is that a field can't be attached to a content type. When you attach it to a content type in the admin UI, Orchard does some magic behind the scenes to hide this fact, it creates a content part inside that content type, with the same name as the content type, and then attaches the field(s) to that new content part.

So here is the solution:

        //Create new table for the new part
        SchemaBuilder.CreateTable(typeof(SampleRecord).Name, table => table
            .ContentPartRecord()
            .Column("SampleColumn", DbType.String)
        );

        //Attach field to the new part
        ContentDefinitionManager.AlterPartDefinition(
            typeof(SamplePart).Name, 
            cfg => cfg
                .Attachable()
                .WithField("Topic", fcfg => fcfg
                    .OfType("TaxonomyField")
                    .WithDisplayName("Topic")
                    .WithSetting("Taxonomy", "Topics")
                    .WithSetting("LeavesOnly", "true")
                    .WithSetting("SingleChoice", "true")
                    .WithSetting("Required", "true"))
            );

        //Attach part to the new Content Type
        ContentDefinitionManager.AlterTypeDefinition("Sample",
                 cfg => cfg
                     .WithPart(typeof(SamplePart).Name
                ));

I created a table with a column named "SampleColumn" and I attached a field "Topic" for the Taxonomy named "Topics". Hope it helps someone else.