如何对具有多个值的字段排序结果集？

Question

In my SOLR I keep events that repeats themselves.
So, event A has something a repeat on the 11th 12th and 29th
Event b has repeat on the 2nd and 15th
Event c has on the 12th and 29th

I want to fetch the events ordered by their dates, I want it to be ordered by the first date in the collection.
Expected result:

Event B  
      A
      C

The schema entry is

 <fieldType name="tdate" class="solr.TrieDateField" omitNorms="true" precisionStep="6" positionIncrementGap="0"/>

 <field name="date_start" type="tdate" indexed="true" stored="true" required="false" multiValued="true"/>

What would bethe URL I would use?

Answer 1

我的解决方案建议将第一个日期复制到一个单独的可排序字段中，而谷歌建议这是唯一简单的解决方案。