Ferret 0.10 and Fields

Ruby Apps Ferret
1

Hey …

I just tried to convert my code to 0.10 … But i’m currently not sure
how to use fields…

i really like some of the new api… its leaner and i like the fact that
these strange consts are gone (like
Ferret::Search::BooleanClause::Occur::MUST) …

I see that you’re now having Ferret::Index::FieldInfo to describe the
fields of the index… thats good… and i now see that documents and
fields are much smaller and easier to create… thats good as well :slight_smile:

now what i dont get is how to add a field to a document… i can create a
new field or a document, but how to make give the field a name? i would
expect something like

doc = Document.new
fiels = Field.new(“my data to be indexed”, 1.5)
doc.add_field( ‘title’, field )

or

doc.title = field …

can’t see anything like that in the API though…

Ben

2

On Wed, Aug 23, 2006 at 08:22:42PM +0200, Benjamin K. wrote:

fields of the index… thats good… and i now see that documents and
or

doc.title = field …

can’t see anything like that in the API though…

it’s as easy as doc[:title] = field

Jens

–
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D-01069 Dresden Fax +49 351 46766 66

3

On 8/24/06, Jens K. [email protected] wrote:

I see that you’re now having Ferret::Index::FieldInfo to describe the

or

doc.title = field …

can’t see anything like that in the API though…

it’s as easy as doc[:title] = field

Jens

Just to clarify. Hashes are the new Documents. If you don’t use the
boost field then use a Hash. It’s much simpler. Everyone knows how to
use a Hash.

index << {:title => "Shawshank Redemption", :tags => ["Drama",

“Suspense”, “Jail”, “Prison”]}

In fact if you don’t want to use the Document class at all;

class Hash
    include BoostMixin
end

doc = {:title => "Shawshank Redemption", :tags => ["Drama",

“Suspense”, “Jail”, “Prison”]}

doc.boost = 100.0

NOTE: all fields should now be Symbols. Strings will work in most
cases but Symbols are what is expected. They’re much more efficient
anyway.

I mean to do a big write up explaining the changes but I just don’t
have the time right now. Perhaps tomorrow.

Cheers,
Dave

4

hey…

it’s as easy as doc[:title] = field

thats quite easy… indeed :slight_smile:

NOTE: all fields should now be Symbols. Strings will work in most
cases but Symbols are what is expected. They’re much more efficient
anyway.

what if i add a field to a doc that was not initialized using
fieldinfos?
will this be added anyway and just fallback to the default fieldinfos?
is there a way to prevent fields from beeing added if there is no
fieldinfo definition? And if not, will there be a way?

Thanks,
Ben

5

On 8/24/06, Benjamin K. [email protected] wrote:

what if i add a field to a doc that was not initialized using fieldinfos?
will this be added anyway and just fallback to the default fieldinfos?
is there a way to prevent fields from beeing added if there is no
fieldinfo definition? And if not, will there be a way?

Thanks,
Ben

Great question. Another thing I should elloborate on. When you create
the FieldInfos object you can set the default fields for any unknown
fields you add later. For example

fi = FieldInfos.new(:store => :no, :term_vector => :no)

# fields are normally stored by default but now we've set the

default :store
# value to :no so we need to explicitly state that we want to store
fields;
fi.add_fields(:title, :store => :yes, :index => :untokenized)

index = Index.new(:field_infos => fi)
index << {:title => "asdg", :content => "asdlkgjhasdkgjh"}

Cheers,
Dave