Added search results sort fallback

[litvinovg]

VIVO GitHub issue

What does this pull request do?

Added sort fallback option to provide an option to sort on multiple fields.

What's new?

Added vitro-search:hasFallback object property to specify fallback sort options.
Defined raw name field and field sort options in search configuration.
Defined score field for default (relevance) sort option.
Used raw name sort options as fallback for language specific sort options.
Added Added vitro-search:display data property to control display of sort options.

How should this be tested?

• Reproduce the problem in the issue
• Test that the pull request fixed the issue
• Translations should be reviewed by native speakers

Interested parties

@VIVO-project/vivo-committers

[chenejac]

@milospp, @litvinovg I can't reproduce the issue before application of this PR.
I have tried to turn off multilingual UI in the runtime.properties, but it is still sorting well.

[chenejac]

@litvinovg thanks for the PR.

I have reproduced the issue before applying this fix. The PR is fixing the issue. However, there are five options if multilinguality of UI is turned off:

Sort by Relevance
Sort by Title Z-A
Sort by Title A-Z
Sort by Raw title Z-A
Sort by Raw title A-Z

The second and fourth options, as well as third and fifth options are working the same, but the last two options should be hidden (not to confuse the user).

[litvinovg]

The second and fourth options, as well as third and fifth options are working the same, but the last two options should be hidden (not to confuse the user).
@chenejac I addressed that in recent commit, please check

[chenejac]

@litvinovg thanks for the improvements. It works nice, I have tested the feature with languageFilters and without. Please take a look into my comments.

[bkampe]

"Raw" is not used that way in german, I would suggest to simply remove it.

[chenejac]

@litvinovg this looks ok to me.

[milospp]

@litvinovg Thanks for the fix, this is working for me.