Add Identifier as Search Field and for Advanced Search

[wickr]

Descriptive summary

Direct searching for exact matches by Identifier (metadata field, not work id) is not currently possible since there's only identifier_tesim populated in Solr. It is included in the 'all fields' search but other unrelated matches, especially for numeric things, will also be included.

As part of linking to the Freshwater Treaties works from another system, a query using the 'Identifier' value (here, a numeric treaty number) needs an exact match.

Example of search query with identifier (480) in all_fields and collection specified: https://oregondigital.org/catalog.json?commit=Search&f%5Bmember_of_collection_ids_ssim%5D%5B%5D=freshwater-treaties&all_fields=%22480%22&op=AND&search_field=advanced&sort=score+desc&utf8=%E2%9C%93

Expected behavior

A web/advanced search or JSON catalog query for a value in the 'Identifier' field (probably identifier_ssim), alone or with other filters (such as collection) needs to provide an exact match.

Related work

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