Adding a field to a custom SOLR index configuration

Question

I am moving indexes from Lucene to Solr. Almost everything is working again, except a few custom indexes that have their own index configuration and had some field added to the fieldMap. Other custom indexes are working. The error I get when starting the site is:

[KeyNotFoundException: The given key was not present in the dictionary.] System.Collections.Generic.Dictionary`2.get_Item(TKey key) +13763335
Sitecore.ContentSearch.SolrProvider.SolrFieldMap.AddFieldByFieldName(XmlNode configNode) +618

[TargetInvocationException: Exception has been thrown by the target of an invocation.] X.X.Web.Global.Application_Error(Object sender, EventArgs e) in ...\Global.asax.cs:76 System.Web.HttpApplication.RaiseOnError() +211

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +544
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +186
System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +402
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +343

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +579
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +112 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +716

The index config now:

<indexConfigurations>
    <CustomIndexConfiguration ref="contentSearch/indexConfigurations/defaultSolrIndexConfiguration">
      <fieldMap type="Sitecore.ContentSearch.SolrProvider.SolrFieldMap, Sitecore.ContentSearch.SolrProvider">
        <fieldNames hint="raw:AddFieldByFieldName">
          <field fieldName="text" returnType="string" />
          <field fieldName="webshops" returnType="string" />
          <field fieldName="attributes" returnType="string" />
        </fieldNames>
      </fieldMap>
      <documentOptions type="Sitecore.ContentSearch.SolrProvider.SolrDocumentBuilderOptions, Sitecore.ContentSearch.SolrProvider">
        ...
      </documentOptions>
    </CustomIndexConfiguration>
 </indexConfigurations>

My old Lucene config had a fieldMap like this:

<fieldNames hint="raw:AddFieldByFieldName">
    <field fieldName="text" storageType="YES" indexType="UNTOKENIZED" vectorType="NO" boost="1f" type="System.String" settingType="Sitecore.ContentSearch.LuceneProvider.LuceneSearchFieldConfiguration, Sitecore.ContentSearch.LuceneProvider"/>
    <field fieldName="webshops" storageType="YES" indexType="TOKENIZED" vectorType="NO" boost="1f" type="System.String" settingType="Sitecore.ContentSearch.LuceneProvider.LuceneSearchFieldConfiguration, Sitecore.ContentSearch.LuceneProvider"/>
    <field fieldName="attributes" storageType="YES" indexType="TOKENIZED" vectorType="NO" boost="1f" type="System.String" settingType="Sitecore.ContentSearch.LuceneProvider.LuceneSearchFieldConfiguration, Sitecore.ContentSearch.LuceneProvider">
</fieldNames>

I am definitely missing something (otherwise I wouldn't get an error). Buy what?

Using Sitecore 8.1-upd3, Solr 4.10.3, Autofac 4.1, ...

Answer 1

I think you may be missing type matches within your field map. Try adding this section before your <fieldNames> section

<typeMatches hint="raw:AddTypeMatch">
    <typeMatch typeName="string" type="System.String" fieldNameFormat="{0}_s" settingType="Sitecore.ContentSearch.SolrProvider.SolrSearchFieldConfiguration, Sitecore.ContentSearch.SolrProvider" />
</typeMatches>

I grabbed that from the example Sitecore.ContentSearch.Solr.DefaultIndexConfiguration.config file

Alternatively, you can try referencing the default field map like this:

<fieldMap ref="contentSearch/indexConfigurations/defaultSolrIndexConfiguration/fieldMap">