I had indexed data into Solr and add data into "name","features" field.
So, when I get data using java code I use "getFieldValue("name")" it returns the name into java variable.
When I use java code to get "name" values, I got null values.
When I look into Solr Admin Page: I had seen
"Features" field in Solr has properties "Indexed, Tokenized, Stored, Multivalued".
How can I get the values of Features into variables and print that.
Kindly ask me to further clarify my question.
My best guess is that getFieldValue() returns a Collection for multi-valued fields but you are expecting a String.
It may help if you can post the full code snippet you are using.
Related
In front i want to say that i dont have much experience with Solr.
Problem we are facing, we only want to index content of files and not want to add dynamic fields, is this possible and if so how?
Problem 2: If Problem one is a No, how would we exclude media_black_point,
media_white_point with indexing?
Error code where Solr trips:
{"responseHeader":{"status":400,"QTime":149},"error":{"metadata":["error-class","org.apache.solr.common.SolrException","root-error-class","org.apache.solr.common.SolrException"],"msg":"incompatible dimension (2) and values (313/1000 329/1000). Only 0 values specified","code":400}}
Dynamic Fields and schemaless mode are both there to catch fields you did not declare explicitly. If neither are used, the assumption is that every field you send to Solr (including output from extract handler that generates a Solr document internally) needs to be explicitly mapped. This helps to avoid spelling errors and other unexpected edge-cases.
If you want to ignore all the fields you did not define explicitly, you can use dynamic field with stored/indexed/docValues all set to false. Solr ships with one example out of the box, you just need to uncomment it.
The other option is to ignore specific fields. You can do that by defining a custom UpdateRequestProcessor chain (or individual URP in the latest Solr) and using IgnoreFieldUpdateProcessorFactory with your specific field name or a name pattern.
I am trying to do a solr dismax query over multiple fields, and am a little confused with the syntax.
My core contains a whole load of podcast episodes. The fields in the index are EPISODE_ID, EPISODE_TITLE, EPISODE_DESC, and EPISODE_KEYWORDS.
Now, when I do a query I would like to search for the query term in the EPISODE_TITLE, EPISODE_DESC, and EPISODE_KEYWORDS fields, with different boosts for the different fields.
So when I search for 'jedi', the query I've built looks like this:
http://localhost:8983/solr/episode_core/select?
&defType=dismax&q=jedi&fl=EPISODE_ID,EPISODE_TITLE,EPISODE_DESC,EPISODE_KEYWORDS
&qf=EPISODE_TITLE^3.0+EPISODE_DESC^2.0+EPISODE_KEYWORDS
However, this doesn't seem to work - it returns zero records.
When I put a default field like below, it now works, but this is kind of crap because it means I'm not getting results from searching all of the 3 fields:
http://localhost:8983/solr/episode_core/select?&df=EPISODE_DESC
&defType=dismax&q=jedi&fl=EPISODE_ID,EPISODE_TITLE,EPISODE_DESC,EPISODE_KEYWORDS
&qf=EPISODE_TITLE^3.0+EPISODE_DESC^2.0+EPISODE_KEYWORDS
Is there something I am missing here? I thought that you could search over multiple fields, and I thought that the 'qf' parameter would mean you didn't need to supply the default field parameter?
All help much appreciated...
Your idea is correct. If you've defined qf (query fields) for Dismax, there shouldn't be any need to specify a df (default field).
Can you be more specific about what isn't working?
Also, read up on Configuration Invariants in solrconfig.xml as it is possible your configuration could be sending some different parameters than you've specified in the URL.
(E.g. if you're seeing a specific error message asking you to provide a df)
Whenever i query with q=: it shows all the documents but when i query with q=programmer 0 docs found.(contents is the default search field)
my schema has: id(unique),author,title,contents fields
Also query works fine for:
q=author:"Value" or q=title:"my book" etc, only for contents field no results.
Also when i query using spell checker(/spell?q=programmer) output shows spelling suggestions for this word,when 'programmer' is the right word and present in many documents.
I referred the example docs for configurations.
All of a sudden i am getting this,initially it worked fine.
I guess there some problem only in the contents field,but cannot figure it out.
Is it because indexes are not created properly for contents field?
(I am using solr 4.2 on Windows 7 with tomcat as webserver)
Please help.Thanks a lot in advance.
Are you sure you set the default search field? The reason you have this problem might be because you didn't set the <defaultSearchField> field in your schema.xml file. This is why "q=author:value" works while q=WHATEVER doesn't.
The Is used by Solr when parsing queries to
identify which field name should be searched in queries where an
explicit field name has not been used.
But also consider this:
The is used by Solr when parsing queries to
identify which field name should be searched in queries where an
explicit field name has not been used. It is preferable to not use or
rely on this setting; instead the request handler or query LocalParams
for a search should specify the default field(s) to search on. This
setting here can be omitted and it is being considered for
deprecation.
Do you have any data in your instance. try q=*:* and see what it returns. "for" is a stop word, may be it was filtered out. Look for something else as value to test.
I am using Solr version 3.5. I want to implement an auto-suggest feature in my application through the Suggester approach. http://wiki.apache.org/solr/Suggester.
Can someone please help me with the following:
How can i return more than one fields in the query response. For example, i am trying to create an index based on the 'name' field, but i also want to return an 'id' field where these two fields are the product attributes i am search for [say movie titles]. Hence, the response should include both the 'id' and 'title' of the product
How can i do a case-insensitive search using Suggester? For example, a search term "abc" should return documents containing the name as "ABC", "Abc" etc.
Please help.
Regards.
If you're looking to get suggestions on a particular field but also return other fields in the document, you can use the 'Payload' tag. Only one payload field is allowed, but you can get around this by using a json format in the field.
https://cwiki.apache.org/confluence/display/solr/Suggester
https://stackoverflow.com/a/32558487/578582
I think you're not quite getting the point of the suggester. It is not designed to return suggestions for exactly one search result per entry (this is the only scenario where returning the ID would make sense).
You could, however, do normal wildcard searches on the title field and use the returned titles as suggestions. This way you could also get the ID (and any other index field) with the results. I imagine this could be implemented fairly easily with jQuery UI. It may be much slower than the suggest API, depending on your index schema design.
if you are not really interested in the order of the suggestions i found that the weight_field can be [ab]used to return the document id for each suggestion
Solr newbie here.
I have created a Solr index and write a whole bunch of docs into it. I can see
from the Solr admin page that the docs exist and the schema is fine as well.
But when I perform a search using a test keyword I do not get any results back.
On entering * : *
into the query (in Solr admin page) I get all the results.
However, when I enter any other query (e.g. a term or phrase) I get no results.
I have verified that the field being queried is Indexed and contains the values I am searching for.
So I am confused what I am doing wrong.
Probably you don't have a <defaultSearchField> correctly set up. See this question.
Another possibility: your field is of type string instead of text. String fields, in contrast to text fields, are not analyzed, but stored and indexed verbatim.
I had the same issue with a new setup of Solr 8. The accepted answer is not valid anymore, because the <defaultSearchField> configuration will be deprecated.
As I found no answer to why Solr does not return results from any fields despite being indexed, I consulted the query documentation. What I found is the DisMax query parser:
The DisMax query parser is designed to process simple phrases (without complex syntax) entered by users and to search for individual terms across several fields using different weighting (boosts) based on the significance of each field. Additional options enable users to influence the score based on rules specific to each use case (independent of user input).
In contrast, the default Lucene parser only speaks about searching one field. So I gave DisMax a try and it worked very well!
Query example:
http://localhost:8983/solr/techproducts/select?defType=dismax&q=video
You can also specify which fields to search exactly to prevent unwanted side effects. Multiple fields are separated by spaces which translate to + in URLs:
http://localhost:8983/solr/techproducts/select?defType=dismax&q=video&qf=features+text
Last but not least, give the fields a weight:
http://localhost:8983/solr/techproducts/select?defType=dismax&q=video&qf=features^20.0+text^0.3
If you are using pysolr like I do, you can add those parameters to your search request like this:
results = solr.search('search term', **{
'defType': 'dismax',
'qf': 'features text'
})
In my case the problem was the format of the query. It seems that my setup, by default, was looking and an exact match to the entire value of the field. So, in order to get results if I was searching for the sit I had to query *sit*, i.e. use wildcards to get the expected result.
With solr 4, I had to solve this as per Mauricio's answer by defining type="text_en" to the field.
With solr 6, use text_general.