Apache Solr Reference Guide Covering Apache Solr 6.0

own request handler, you should make sure it includes the ability to handle nested paths if you want to use them
with your custom request handler.
It is also possible to configure defaults for request handlers with a section called initParams. These defaults
can be used when you want to have common properties that will be used by each separate handler. For
example, if you intend to create several request handlers that will all request the same list of fields in the
response, you can configure an initParams section with your list of fields. For more information about initPa
rams, see the section InitParams in SolrConfig.
SearchHandlers
The primary request handler defined with Solr by default is the "SearchHandler", which handles search queries.
The request handler is defined, and then a list of defaults for the handler are defined with a defaults list.
For example, in the default
solrconfig.xml, the first request handler defined looks like this:
explicit
10
This example defines the rows parameter, which defines how many search results to return, to "10". The echoP
arams parameter defines that the parameters defined in the query should be returned when debug information is
returned. Note also that the way the defaults are defined in the list varies if the parameter is a string, an integer,
or another type.
All of the parameters described in the section on searching can be defined as defaults for any of the
SearchHandlers.
Besides
defaults, there are other options for the SearchHandler, which are:
appends: This allows definition of parameters that are added to the user query. These might be filter
queries, or other query rules that should be added to each query. There is no mechanism in Solr to allow
a client to override these additions, so you should be absolutely sure you always want these parameters
applied to queries.
inStock:true
In this example, the filter query "inStock:true" will always be added to every query.
invariants: This allows definition of parameters that cannot be overridden by a client. The values
defined in an invariants section will always be used regardless of the values specified by the user, by
the client, in defaults or in appends.
cat
manu_exact
price:[* TO 500]
price:[500 TO *]
In this example, facet fields have been defined which limits the facets that will be returned by Solr. If the
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