This is newbie question, but trying understand solr search handler with defaults enabled.
As per my understanding df is used for Default search field, what will happen/how does it work if remove this part?
My scenario currently: I am pushing/adding all fields data (e.g title, department, etc.) to text. So when I search free text it can be searchable (using edismax) and it works as expected. But when tomorrow new fields come, I mean suppose it will be title, department , somefield, then I have to reindex all data again. Then it will be searchable. How can I achieve that? Can I have multiple fields in df?
example : <str name="df">title, department, etc,etc </str> like this ?
<requestHandler name="/select" class="solr.SearchHandler">
<!-- default values for query parameters can be specified, these
will be overridden by parameters in the request
-->
<lst name="defaults">
<str name="echoParams">explicit</str>
<int name="rows">10</int>
<!-- Default search field -->
<str name="df">text</str>
</lst>
Since you're using edismax, you can provide the qf argument with multiple fields instead - and weights between them. Another option is to have one common field, i.e. something like text and a copyField instruction that copies everything (source set to *) to text (dest set to text), then search against that field.
Using either won't require a reindex, since the content will either be copied from all documents indexed as they're being indexed, or the search will consider more fields (with qf).
You can set the default value for the qf in the same was a you've shown above in the config file under defaults.
Related
I need to perform highlighting for multiple words into the same field but for each one using a specific formatter (prefix and postfix).
Let's say that I have the description field and for a document it has the value: Einstein always excelled at math and physics from a young age. How to highlight math with a pair of a specific prefix and postfix AND ALSO physicswith a different prefix-postfix pair? So, in the end I would like to obtain:
Einstein always excelled at <em class="hl-red">math</em> and <em class="hl-green">physics</em> from a young age
The reason is that in the frontend I have different CSS classes with background-color: red; for hl-red and background-color: green for hl-green for example.
However, I was managed to highlight multiple words into the same field but with the same prefix-postfix pair all over the places, which is not what I want actually. In addition, I tried to add multiple HtmlFormatter entries in solrconfig.xml:
<highlighting>
..............
<formatter name="html" default="true" class="solr.highlight.HtmlFormatter">
<lst name="defaults">
<str name="hl.simple.pre"><![CDATA[<em>]]></str>
<str name="hl.simple.post"><![CDATA[</em>]]></str>
</lst>
<lst name="hl-red">
<str name="hl.simple.pre"><![CDATA[<em class="hl-red">]]></str>
<str name="hl.simple.post"><![CDATA[</em>]]></str>
</lst>
<lst name="hl-green">
<str name="hl.simple.pre"><![CDATA[<em class="hl-green">]]></str>
<str name="hl.simple.post"><![CDATA[</em>]]></str>
</lst>
</formatter>
..............
</highlighting>
but I got HttpSolrClient$RemoteSolrException: Error from server at http://localhost:8983/solr: Unknown formatter: hl-green. Also, I didn't find a way to specify an array of prefixes in Solr Admin UI nor in spring-data-solr, just a simple query like this:
SimpleHighlightQuery query = new SimpleHighlightQuery(Objects.requireNonNull(criteria));
HighlightOptions highlightOptions = new HighlightOptions()
.addFields(fields)
.setSimplePrefix(prefix)
.setSimplePostfix(postfix);
query.setHighlightOptions(highlightOptions);
query.setPageRequest(pageable);
return solrTemplate.queryForHighlightPage(MY_CORE, query, MyModel.class);
My assumption is that it is a limitation of the Solr itself.
I was thinking about to write a custom fragmentsBuilder but I do not know exactly if it is the case nor how to do that. For another workaround I was thinking to execute for each word a highlight query, then to store the result, then to execute for the second word another highlight query, store the result and so on. But I don't think it is a good and elegant solution because I will have problems when executing the second query if the second word is: "em" or "class" or "red"/"green" (nested undesired highlighting will occur).
I am using spring-data-solr into a Spring Boot application and Solr 6.6.5 as a (http) service.
Does anyone know how to solve this? Please give me an advice! Any idea will be much appreciated!
To exclude some documents from the search result, I can use the not in or - negative sign to specify the ids like this through a query.
select/?q=:&fq=-id:86+-id:338
But i want to pre configure in solr that on any search the results of certain documents will never show up
You can add a parameter list to a definition for a requestHandler that appends a fq statement to all requests. The example from the wiki does something similar:
<lst name="appends">
<!-- no matter what other fq are also used, always remove these two documents -->
<str name="fq">-id:(86 338)</str>
</lst>
This fq will then always be appended to the request made.
We can also use following :
<lst name="appends">
<str name="excludeIds">86,338</str>
</lst>
I tried and it also gives expected result.
I am trying to perform a search and Solr does not return me any results when I search with default text entry,It works when I mention the field name in the query browser.Ex q contact:Ajay returns the contact But I need to return with only Ajay as search field.Please help.
Check the default field defined in the initParams section of solrconfig.xml. You can update, df parameter to the field you want as the default field. Here is the default configuration from solr 5.2.0. You can use any field in place of text, which is default for all the listed requestHandler in the path.
<initParams path="/update/**,/query,/select,/tvrh,/elevate,/spell">
<lst name="defaults">
<str name="df">text</str>
</lst>
</initParams>
If you want to provide search on the all fields of your schema. You need need to create an new field, let say search_field, then copy all the fields into it, using copyField definition. You the search_field in the initParams.
<copyField source="field1" dest="search_field"/>
I am trying to Implement Apache Solr search through SolrNet library.So far I have managed to run an instance of Solr in my machine and make some queries based on specific fields.
My code to do it looks like this
var solr = ServiceLocator.Current.GetInstance<ISolrOperations<Product>>();
var results = solr.Query(new SolrQueryByField("id", "SP2514N"));
This one works fine now,But I would like to make queries with out specifying a field , So that when I enter a search key word solr will look in to the all fields available and return a result.I have Found the code to make it in SolrNet library from here
var solr = ServiceLocator.Current.GetInstance<ISolrOperations<Product>>();
var results = solr.Query(new SolrQuery("SP2514N"));
But this never worked,When I drilled down to bottom ,I found that I need to set default search fields in Solr instance so that Solr will search that fields when nothing else is selected(This is how i understood it I am not sure about this).
So I went to set default fields in Solr ,I took Solrconfig.XML and edited it like this
<requestHandler name="/query" class="solr.SearchHandler" default="true">
<lst name="defaults">
<str name="echoParams">explicit</str>
<str name="wt">json</str>
<str name="indent">true</str>
<str name="df">text</str>
<str name="df">id</str>
</lst>
</requestHandler>
[just added <str name="df">id</str> this field as extra].But this too never helped And I am stuck ,Can any one tell me How I could set default search field in Solr correctly?Or am i doing any thing else wrong?
I have Uploaded My Solrconfig file here
I do not know about SolrNet library, but to make a default field for search you need to define DefaultSearchField in schema.xml i.e. <defaultSearchField>FieldName</defaultSearchField>.
You can find this file # <SOLR_HOME>\apache-solr-3.6.0\example\example-DIH\solr\testsyndrome\conf\schema.xml
I hope that's what you are looking for.
Don't start from SolrNet, use Solr's built-in Web Admin interface. Iterate there until you understand the request handlers and the parameters. Then, go back to SolrNet.
In your case, it seems that you changed default request handler and tried to use df parameter twice. I would stick to the original request handler for now just to avoid the extra issue.
With using df parameter, are you trying to search a single field or multiple fields? If single field, keep only one value for the parameter. If multiple, you need to switch to using eDisMax, where you can provide a set of fields.
Again, admin interface lets you experiment with it, then you can add it into the handler's default parameter.
I'm using FieldCollapsing to group the results.
Example: I search for : and group by names, like:
http://localhost:<port>/solr/select/?q=*:*
&group=true
&group.limit=200
&group.query=Jim
&group.query=Jon
&group.query=Frank Sinatra
It looks like, solr is running (internal) an separate query for every name. (whatever)
The point is, that i have to change the search parameter local in order to set an different search operator (from OR to AND).
To get valid results I need an query like this:
http://localhost:<port>/solr/select/?q=*:*
&group=true
&group.limit=200
&group.query={!q.op=AND defType=edismax}Jim
&group.query={!q.op=AND defType=edismax}Jon
&group.query={!q.op=AND defType=edismax}Frank Sinatra
This works very well. The Problem is, that solr returns the label of the group including the locale parameter!
<lst name="grouped">
<lst name="{!q.op=AND defType=edismax}Frank Sinatra"> <---- wrong label
<int name="matches">785</int><result name="doclist" numFound="10" start="0">
<doc>
[...]
An valide result is be:
<lst name="grouped">
<lst name="Frank Sinatra">
<int name="matches">785</int><result name="doclist" numFound="10" start="0">
<doc>
[...]
Is there a way to change to label to the real term where solr is searching for?