[jira] [Created] (SOLR-9098) Show if schema is currently mutable or not

["Stefan Matheis (steffkes) (JIRA)" <ji...@apache.org>]

Stefan Matheis (steffkes) created SOLR-9098:
-----------------------------------------------

             Summary: Show if schema is currently mutable or not
                 Key: SOLR-9098
                 URL: https://issues.apache.org/jira/browse/SOLR-9098
             Project: Solr
          Issue Type: Improvement
          Components: Schema and Analysis
            Reporter: Stefan Matheis (steffkes)
            Assignee: Stefan Matheis (steffkes)
            Priority: Minor
             Fix For: master (7.0)


When our schema is not mutable (for whatever reason) the only way to get that information is to try a change and see if it fails, like this:

{code}$ curl -i localhost:8983/solr/dummy/schema -d '{ "add-field":{ "name":"sell-by", "type":"tdate", "stored":true } }'
HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Content-Length: 112

{
  "responseHeader":{
    "status":0,
    "QTime":5
  },
  "errors":[
    {
      "errorMessages":"schema is not editable"
    }
  ]
}{code}

this message is caused by {{SchemaManager#performOperations}} which checks if {{schema instanceof ManagedIndexSchema && schema.isMutable()}} - we could include that information in the response for {{/schema}} and allow users to see upfront if they could modify the schema or rather not.

[~steve_rowe] i'm not entirely sure that i didn't miss any tests related to the schema handler, would you mind having a look?



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