Generating Drop Down (for Foreign Key) in UI

Is it possible to generate UI (drop down) for foreign keys? I am trying to create a Blog and Comments this way:

mix phx.gen.html Core Blog blogs title:string content:string

mix phx.gen.html Core Comment comments content:string blog_id:references:blogs

When I run this, I notice that the tables do generate the columns. However, the Comments’ UI does not generate a drop-down to select the Blog.