Staying under the document limit when using the Find developer index

When working on a site migration with a LOT of content we often find ourselves running up against the 10,000 document limitation on a developer index.

I learned this trick from a coworker. You can use an Initialization Module to get some fine-grained control over what is getting added to the index.

using System;
using System.Diagnostics;
using System.Linq;
using AlloyInitModuleTest.Models.Media;
using AlloyInitModuleTest.Models.Pages;
using EPiServer.Core;
using EPiServer.Find.ClientConventions;
using EPiServer.Find.Cms;
using EPiServer.Find.Cms.Conventions;
using EPiServer.Find.Cms.Module;
using EPiServer.Find.Framework;
using EPiServer.Framework;
using EPiServer.Framework.Initialization;


    [InitializableModule]
    [ModuleDependency(typeof(EPiServer.Web.InitializationModule))]
    public class SearchConventionInitializationModule : IInitializableModule
    {
        public void Initialize(InitializationEngine context)
        {
            //Add initialization logic, this method is called once after CMS has been initialized
            this.SetTypesToIndex(ContentIndexer.Instance.Conventions);
    }

    [Conditional("DEBUG")]
    private void SetTypesToIndex(IContentIndexerConventions conventions)
    {
        // start from a clean slate
        conventions.ForInstancesOf<ContentData>().ShouldIndex(x => false);

        //one by one turn on or off as you develop the site, remember to reindex 
        conventions.ForInstancesOf<ImageFile>().ShouldIndex(x => false);
        conventions.ForInstancesOf<GenericMedia>().ShouldIndex(x => false);
        conventions.ForInstancesOf<LandingPage>().ShouldIndex(x => true);
    }

    public void Uninitialize(InitializationEngine context)
        {
            //Add uninitialization logic
        }
    }

[Conditional("DEBUG")] allows us to limit this to debug builds and index everything in production.