Session: How to Use MoreLikeThis
MoreLikeThis
is available through query methods and will return similar documents according to the provided criteria and options.
Syntax
query.moreLikeThis(moreLikeThis);
query.moreLikeThis(builder);
Parameters
moreLikeThis
MoreLikeThisBase
Defines the type of MoreLikeThis that should be executed
builder
function
Builder with fluent API that constructs the MoreLikeThisBase
instance
Builder
builder.usingAnyDocument();
builder.usingDocument(documentJson);
builder.usingDocument(filterBuilder);
builder.withOptions(options);
Parameters
documentJson
string
Inline JSON document that will be used as a base for operation
builder
(filterBuilder) => void
Filtering expression utilized to find a document that will be used as a base for operation
options
object
Non-default options that should be used for operation
minimumTermFrequency
number
Ignores terms with less than this frequency in the source doc
maximumQueryTerms
number
Returns a query with no more than this many terms
maximumNumberOfTokensParsed
number
The maximum number of tokens to parse in each example doc field that is not stored with TermVector support
minimumWordLength
number
Ignores words less than this length or, if 0, then this has no effect
maximumWordLength
number
Ignores words greater than this length or if 0 then this has no effect
minimumDocumentFrequency
number
Ignores words which do not occur in at least this many documents
maximumDocumentFrequency
number
Ignores words which occur in more than this many documents
maximumDocumentFrequencyPercentage
number
Ignores words which occur in more than this percentage of documents
boost
boolean
Boost terms in query based on score
boostFactor
number
Boost factor when boosting based on score
stopWordsDocumentId
string
Document ID containing custom stop words
fields
string[]
Fields to compare
Example I
// Search for similar articles to 'articles/1'
// using 'Articles/MoreLikeThis' index and search only field 'body'
const options = { fields: [ "body" ] };
const articles = await session
.query({ indexName: "Articles/MoreLikeThis" })
.moreLikeThis(builder => builder
.usingDocument(x => x.whereEquals("id()", "articles/1"))
.withOptions(options))
.all();
from index 'Articles/MoreLikeThis'
where morelikethis(id() = 'articles/1', '{ "Fields" : [ "body" ] }')
Example II
// Search for similar articles to 'articles/1'
// using 'Articles/MoreLikeThis' index and search only field 'body'
// where article category is 'IT'
const options = { fields: [ "body" ] };
const articles = await session
.query({ indexName: "Articles/MoreLikeThis" })
.moreLikeThis(builder => builder
.usingDocument(x => x.whereEquals("id()", "articles/1"))
.withOptions(options))
.whereEquals("category", "IT")
.all();
from index 'Articles/MoreLikeThis'
where morelikethis(id() = 'articles/1', '{ "Fields" : [ "body" ] }') and category == 'IT'
Please enable JavaScript to view the comments powered by Disqus.