Adding fields to Solr using the API - solr

Question

I am very new to solr. I am trying to add a large number of fields to the schema. I am using version 8.1, and it is my understanding that it should be done through the API.
I am trying to upload all fields using curl, but keep getting errors. It works fine through the web interface.
1. Where can I find the correct field types? I checked
here, but I get error messages like "Field type 'StrField' not found".The values are also different from the ones that I get presented with in the webinterface.
2. Enum valuesI found documentation, which also results in an unknown field error. For enumns I don't see an option in the web interface.
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curl -X POST -H 'Content-type:application/json' --data-binary '{"add-field":{"name":"TEST","type":"string","required":"true","stored":true,"indexed":"true"}}' http://localhost:8983/api/cores/tgec/schema
{
"responseHeader":{
"status":400,
"QTime":27},
"error":{
"metadata":[
"error-class","org.apache.solr.api.ApiBag$ExceptionWithErrObject",
"root-error-class","org.apache.solr.api.ApiBag$ExceptionWithErrObject"],
"details":[{
"add-field":{
"name":"TEST",
"type":"StrField",
"required":"true",
"stored":true,
"indexed":"true"},
"errorMessages":["Field 'TEST': Field type 'StrField' not found.\n"]}],
"msg":"error processing commands",
"code":400}}

Answer 1

There is field type named "string" and the class is of "solr.StrField".
Its defined in schema.xml as below.
<fieldType name="string" class="solr.StrField" sortMissingLast="true" docValues="true" />
Then when you define a field, you mention a type string to it as below.
<field name="id" type="string" indexed="true" stored="true" required="true" multiValued="false" />
You need to change the "type":"StrField" to "type":"string".