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https://issues.apache.org/jira/browse/SOLR-5084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13753786#comment-13753786
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Robert Muir commented on SOLR-5084:
-----------------------------------
{quote}
As long as the config forces them to be explicit about the values (and has
error checking at startup that the values start a "0" and are monotomicly
increasing ints) then anyone who wants to "insert" values into their config is
going to have to pause and think about the fact that there is a concrete int
associated with the existing values – and is more likely to realize that
changing those ints has consequences.
{quote}
If the values are implicitly 0, 1, 2, ... n, then why force the user to write
that out?
If you are worried about idiot users, add a comment around the field type to
the example:
{code}
<!-- note: you cannot change the order/existing values without reindexing.
but you can always add new values to the end. -->
{code}
Otherwise it just makes the configuration overly verbose to have them write
0..n themselves.
> new field type - EnumField
> --------------------------
>
> Key: SOLR-5084
> URL: https://issues.apache.org/jira/browse/SOLR-5084
> Project: Solr
> Issue Type: New Feature
> Reporter: Elran Dvir
> Attachments: enumsConfig.xml, schema_example.xml, Solr-5084.patch,
> Solr-5084.patch, Solr-5084.patch, Solr-5084.patch, Solr-5084.trunk.patch
>
>
> We have encountered a use case in our system where we have a few fields
> (Severity. Risk etc) with a closed set of values, where the sort order for
> these values is pre-determined but not lexicographic (Critical is higher than
> High). Generically this is very close to how enums work.
> To implement, I have prototyped a new type of field: EnumField where the
> inputs are a closed predefined set of strings in a special configuration
> file (similar to currency.xml).
> The code is based on 4.2.1.
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