alpha-sort-field.txt

https://github.com/projectblacklight/blacklight-jetty/blob/master/solr/blacklight-core/conf/schema.xml

    <!-- This is an example of using the KeywordTokenizer along
         With various TokenFilterFactories to produce a sortable field
         that does not include some properties of the source text
      -->
    <fieldType name="alphaOnlySort" class="solr.TextField" sortMissingLast="true" omitNorms="true">
      <analyzer>
        <!-- KeywordTokenizer does no actual tokenizing, so the entire
             input string is preserved as a single token
          -->
        <tokenizer class="solr.KeywordTokenizerFactory"/>
        <!-- The LowerCase TokenFilter does what you expect, which can be
             when you want your sorting to be case insensitive
          -->
        <filter class="solr.LowerCaseFilterFactory" />
        <!-- The TrimFilter removes any leading or trailing whitespace -->
        <filter class="solr.TrimFilterFactory" />
        <filter class="solr.PatternReplaceFilterFactory"
                pattern="([^a-z])" replacement="" replace="all"
        />
      </analyzer>
    </fieldType>

Before running the curl scripts, do this
export SOLR_USER=[[redacted]]
export SOLR_PASSWORD=[[redacted]]

curl -X POST -H 'Content-type:application/json' --data-binary '
{
    "replace-field-type": {
        "name": "alphaOnlySort",
        "class": "solr.TextField",
        "sortMissingLast": "true",
        "omitNorms": "true",
        "analyzer": {
            "tokenizer": {
                "class": "solr.KeywordTokenizerFactory"
            },
            "filters": [{
                "class": "solr.LowerCaseFilterFactory"
            }, {
                "class": "solr.TrimFilterFactory"
            }, {
                "class": "solr.PatternReplaceFilterFactory",
                "pattern": "([^a-z0-9])",
                "replacement": "",
                "replace": "all"
            }]
        }
    }
}
'   -u "${SOLR_USER}:${SOLR_PASSWORD}" http://aws-108-118.internal.library.cornell.edu:8983/solr/digitalcollections4/schema

curl -X POST -H 'Content-type:application/json' --data-binary '{
  "delete-field-type":{ "name":"alphaOnlySort" }
}'  -u "${SOLR_USER}:${SOLR_PASSWORD}" http://aws-108-118.internal.library.cornell.edu:8983/solr/digitalcollections4/schema


dynamic field
curl -X POST -H 'Content-type:application/json' --data-binary '{
  "add-dynamic-field":{
     "name":"*_alpha_only_sort",
     "type":"alphaOnlySort",
     "stored":false,
     "indexed":true
 }
}'   -u "${SOLR_USER}:${SOLR_PASSWORD}" http://aws-108-118.internal.library.cornell.edu:8983/solr/digitalcollections4/schema

curl -X POST -H 'Content-type:application/json' --data-binary '{
  "delete-dynamic-field":{ "name":"*_alpha_only_sort" }
}'   -u "${SOLR_USER}:${SOLR_PASSWORD}" http://aws-108-118.internal.library.cornell.edu:8983/solr/digitalcollections4/schema


copyfield
curl -X POST -H 'Content-type:application/json' --data-binary '{
  "add-copy-field":{
     "source":"title_ssi",
     "dest":[ "title_alpha_only_sort" ]}
}'   -u "${SOLR_USER}:${SOLR_PASSWORD}" http://aws-108-118.internal.library.cornell.edu:8983/solr/digitalcollections4/schema


curl -X POST -H 'Content-type:application/json' --data-binary '{
  "delete-copy-field":{ "source":"title_ssi", "dest":[ "title_alpha_only_sort" ]}
}'   -u "${SOLR_USER}:${SOLR_PASSWORD}" http://aws-108-118.internal.library.cornell.edu:8983/solr/digitalcollections4/schema