preserve association or position in multivalued in solr

问题

I have multivalued fields in my solr datasource. sample is

  <doc>
    <str name="id">23606</str>
    <arr name="fecha_referencia">
        <str>2020-05-24</str>
        <str>2018-01-18</str>
        <str>1997-07-22</str>
    </arr>
    <arr name="tipo_de_fecha">
        <str>Publicacion</str>
        <str>Creación</str>
        <str>Edicion</str>
    </arr>
    </doc>

But the point is that when I do a search I want the date 2020-05-24 to belong to the "Publication" date type, because solr does not handle positions but rather looks for at least one match between the Arrays of reference_date and date_type.

The question is: how could i preserve ordering/mapping in multivalued in solr?

This is my data-config.xml structure:

<dataConfig>
<dataSource  type="JdbcDataSource" driver="org.postgresql.Driver" url="jdbc:postgresql://10.152.11.47:5433/metadatos" user="us_me" password="ntm" URIEncoding="UTF-8" />
    <document >
       <entity name="tr_ident" query="SELECT id_ident, titulo,proposito,descripcion,palabra_cve
        FROM ntm_p.tr_ident">
            <field column="id_ident" name="id_ident" />
            <field column="titulo" name="titulo" />
            <field column="proposito" name="proposito" />      
       <entity name="ti_fecha_evento"
              query="select tipo_fecha,fecha_referencia from ntm_p.ti_fecha_evento where id_fecha_evento='${tr_ident.id_ident}'">
            <field column="fecha_referencia" name="fecha_referencia" />
            <entity name="tc_tipo_fecha" query="select des_tipo_fecha,id_tipo_fecha from ntm_p.tc_tipo_fecha where id_tipo_fecha='${ti_fecha_evento.tipo_fecha}'">
                <field column="id_tipo_fecha" name="id_tipo_fecha" />
                    </entity>
           </entity>
      </entity>
    </document>
</dataConfig>

回答1:

It's important to note that ordering is preserved as long as the field is stored (and not just have docValues enabled) - the first date will be the first date that was sent to the field, which can then be mapped to the first field in the second field.

However, what you're looking for is a dependent query, where each field is queried in relation to the other. In that case, index each value as a field by itself - either by explicitly defining them, or by using a dynamic field name.

fecha_referencia_publicacion: "2020-05-24",
fecha_referencia_creacion: "2018-01-18",
...

That way you can perform any range queries and faceting on the field as usual.

Alternatively, if you only need exact hits, you can index a concatenated value where both the type and the date is indexed into the same field:

fecha_referencia: "Publicacion_2020-05-24"

来源：https://stackoverflow.com/questions/63472784/preserve-association-or-position-in-multivalued-in-solr

标签

solr

field

multivalue