Passing id array as option in find_by_solr

Needs: I wan’to apply the solr query by keyword to a subgroups of
documents.

I’m putting on the index only title and content of each, is it
possibile to do something like this:

@articles = Article.find_by_solr(params[:query], {:scores => true, :id
=> [1,2,3]})

this above does not work, I get: “Invalid parameters: id”

it’s ok if u know any other way to obtain that. :wink:

This is an example of xml result to a query:


0.18781202


Article:77

77

last possibility… i’d need to force find_by_solr to filter using
“Article.id IN (?)”, [1,2,3]
(or a variable of array…of course)

On Oct 12, 4:40 am, adedip [email protected] wrote:

Needs: I wan’to apply the solr query by keyword to a subgroups of
documents.

I’m putting on the index only title and content of each, is it
possibile to do something like this:

@articles = Article.find_by_solr(params[:query], {:scores => true, :id
=> [1,2,3]})

this above does not work, I get: “Invalid parameters: id”
[snip]

last possibility… i’d need to force find_by_solr to filter using
“Article.id IN (?)”, [1,2,3]
(or a variable of array…of course)

(see this post:
http://groups.google.com/group/rubyonrails-talk/tree/browse_frm/thread/09017243a0129678/831c2318fcc0a972
for more discussion)

The short answer is that you can limit the records that find_by_solr
returns by calling it on a scoped instance instead of the model class.
So in your example, you’d want something like:

Article.scoped(:conditions => { :id =>
some_array_of_ids }).find_by_solr(…whatever you usually pass…)

Note that this is not actually scoping the find_by_solr; it’s just
scoping the results (find_by_solr gets an array of IDs back from Solr,
then does a find(:all, :conditions => { :id => results }) which gets
scoped.

In your particular case (having a bunch of IDs to limit to), you could
also use find_id_by_solr, like this:

solr_ids = Article.find_ids_by_solr(…)
@articles = Article.find(limit_ids & solr_ids)

The other technique is much more generally applicable, whereas this
ONLY works for limiting by ID.

–Matt J.

On Oct 13, 8:52 pm, Matt J. [email protected] wrote:

The short answer is that you can limit the records that find_by_solr
returns by calling it on a scoped instance instead of the model class.
So in your example, you’d want something like:

Article.scoped(:conditions => { :id =>
some_array_of_ids }).find_by_solr(…whatever you usually pass…)

Note that this is not actually scoping the find_by_solr; it’s just
scoping the results (find_by_solr gets an array of IDs back from Solr,
then does a find(:all, :conditions => { :id => results }) which gets
scoped.

This would be good at least…but there’s a problem: I’ve tryed
this…it comes out with a synch error. and it makes sense because it
finds all the solr records in the index but less in the DB…that’s not
actually true…but it is for solr because its new DB is the one scoped
(where most of the times occur not all the ids retrieved by solr
query)

In your particular case (having a bunch of IDs to limit to), you could
also use find_id_by_solr, like this:

solr_ids = Article.find_ids_by_solr(…)
@articles = Article.find(limit_ids & solr_ids)

the second line is the syntax for intersection right?
is find_ids_by_solr different from find_id_by_solr ?

The other technique is much more generally applicable, whereas this
ONLY works for limiting by ID.
I’m afraid is the only option…
All of this of course is a matter on tons of records I need to solve
(into studying area) the needs is that if I have only 5 ids to look
keywords into…i don’t want to search all the index… and this happen
anyway in the cases showned above :S

thanks a lot!

The big deal is that option only allowed RANGE and only OR chain…in
fact this:

find_by_solr “query-string AND (id:(1) OR id:(42))”

work… (so I’ve been told) and logically talking it does the right
thing…in only search for query-string among the subset of ids…
but…is this the only way?..so ugly? the guy who tried this moreover
said that this fails often in production…probably due to the high
number of ids…
(ref:
http://groups.google.com/group/acts_as_solr/browse_thread/thread/4657b9712402106e
)

This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs