Analyzer Management

The JavaScript API can be accessed via the @arangodb/analyzers module from both server-side and client-side code (arangosh, Foxx):

var analyzers = require("@arangodb/analyzers");

See Analyzers for general information and details about the attributes.

Analyzer Module Methods

Create an Analyzer

var analyzer = analyzers.save(<name>, <type>[, <properties>[, <features>]])

Create a new Analyzer with custom configuration in the current database.

• name (string): name for identifying the Analyzer later
• type (string): the kind of Analyzer to create
• properties (object, optional): settings specific to the chosen type. Most types require at least one property, so this may not be optional
• features (array, optional): array of strings with names of the features to enable
• returns analyzer (object): Analyzer object, also if an Analyzer with the same settings exists already. An error is raised if the settings mismatch or if they are invalid

arangosh> var analyzers = require("@arangodb/analyzers");
arangosh> analyzers.save("csv", "delimiter", { "delimiter": "," }, ["frequency", "norm", "position"]);

{ 
  "name" : "_system::csv", 
  "type" : "delimiter", 
  "properties" : { 
    "delimiter" : "," 
  }, 
  "features" : [ 
    "frequency", 
    "position", 
    "norm" 
  ] 
}

Get an Analyzer

var analyzer = analyzers.analyzer(<name>)

Get an Analyzer by the name, stored in the current database. The name can be prefixed with _system:: to access Analyzers stored in the _system database.

• name (string): name of the Analyzer to find
• returns analyzer (object|null): Analyzer object if found, else null

arangosh> var analyzers = require("@arangodb/analyzers");
arangosh> analyzers.analyzer("text_en");

[ArangoAnalyzer "text_en" (type text)]

List all Analyzers

var analyzerArray = analyzers.toArray()

List all Analyzers available in the current database.

• returns analyzerArray (array): array of Analyzer objects

arangosh> var analyzers = require("@arangodb/analyzers");
arangosh> analyzers.toArray();

[ 
  [ArangoAnalyzer "text_zh" (type text)], 
  [ArangoAnalyzer "text_sv" (type text)], 
  [ArangoAnalyzer "text_nl" (type text)], 
  [ArangoAnalyzer "text_it" (type text)], 
  [ArangoAnalyzer "text_fr" (type text)], 
  [ArangoAnalyzer "text_pt" (type text)], 
  [ArangoAnalyzer "text_no" (type text)], 
  [ArangoAnalyzer "text_fi" (type text)], 
  [ArangoAnalyzer "text_es" (type text)], 
  [ArangoAnalyzer "text_en" (type text)], 
  [ArangoAnalyzer "text_ru" (type text)], 
  [ArangoAnalyzer "text_de" (type text)], 
  [ArangoAnalyzer "identity" (type identity)] 
]

Remove an Analyzer

analyzers.remove(<name> [, <force>])

Delete an Analyzer from the current database.

• name (string): name of the Analyzer to remove
• force (bool, optional): remove Analyzer even if in use by a View. Default: false
• returns nothing: no return value on success, otherwise an error is raised

arangosh> var analyzers = require("@arangodb/analyzers");
arangosh> analyzers.remove("csv");

(Empty output)

Analyzer Object Methods

Individual Analyzer objects expose getter accessors for the aforementioned definition attributes (see Create an Analyzer).

Get Analyzer Name

var name = analyzer.name()

• returns name (string): name of the Analyzer

arangosh> var analyzers = require("@arangodb/analyzers");
arangosh> analyzers.analyzer("text_en").name();

text_en

Get Analyzer Type

var type = analyzer.type()

• returns type (string): type of the Analyzer

arangosh> var analyzers = require("@arangodb/analyzers");
arangosh> analyzers.analyzer("text_en").type();

text

Get Analyzer Properties

var properties = analyzer.properties()

• returns properties (object): type dependent properties of the Analyzer

arangosh> var analyzers = require("@arangodb/analyzers");
arangosh> analyzers.analyzer("text_en").properties();

{ 
  "locale" : "en", 
  "case" : "lower", 
  "stopwords" : [ ], 
  "accent" : false, 
  "stemming" : true 
}

Get Analyzer Features

var features = analyzer.features()

• returns features (array): array of strings with the features of the Analyzer

arangosh> var analyzers = require("@arangodb/analyzers");
arangosh> analyzers.analyzer("text_en").features();

[ 
  "frequency", 
  "position", 
  "norm" 
]