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The OptimizelyUserContext object allows you to make flag decisions and track events for a user context that you have already created using the Create User Context method.

OptimizelyUserContext version

OptimizelyUserContext is supported on SDK v3.8 and higher.

Forced decision methods version

set_forced_decision(), get_forced_decision(), remove_forced_decision() and remove_all_forced_decisions() methods are supported on v3.10.0 and higher.

OptimizelyUserContext definition

The following code shows the object definition for OptimizelyUserContext:

module Optimizely
  class OptimizelyUserContext

    attr_reader :user_id
    # Create an instance of the Optimizely User Context. Pass in user id and optionally user attributes 
    def initialize(optimizely_client, user_id, user_attributes)

    # set an attribute for the user
    def set_attribute(attribute_key, attribute_value)
    # get attributes for the user
    def user_attributes

    # make a decision about which flag variation the user buckets into for the flag key 
    def decide(key, options = nil)

    # make decisions about which flag variations the user buckets into for flag keys 
    def decide_for_keys(keys, options = nil)

    # make decisions about which flag variations the user buckets into for all flags 
    def decide_all(options = nil)

    # track user event
    def track_event(event_key, event_tags = nil)
    # OptimizelyDecisionContext
    OptimizelyDecisionContext =, :rule_key)
    # OptimizelyForcedDecision
    OptimizelyForcedDecision =

    # Sets the forced decision (variation_key) for a given decision context
    def set_forced_decision(context, decision)

    # Returns the forced decision for a given decision context
    def get_forced_decision(context)

    # Removes the forced decision for a given decision context
    def remove_forced_decision(context)

    # Removes all forced decisions bound to this user context
    def remove_all_forced_decisions



The following table shows attributes for the OptimizelyUserContext object:






The ID of the user

(optional) attributes


A map of custom key-value pairs specifying attributes for the user that are used for audience targeting. You can pass the map with the user ID when you create the user.


The following table shows methods for the OptimizelyUserContext object:




Pass a custom user attribute as a key-value pair to the user context.


Returns a decision result for a flag key for a user. The decision result is returned in an OptimizelyDecision object, and contains all data required to deliver the flag rule.
See Decide methods


Returns a map of flag decisions for specified flag keys.
See Decide methods


Returns decisions for all active (unarchived) flags for a user.
See Decide methods


Tracks a conversion event (in other words, an action a user takes) for a user. Logs an error message if the specified event key doesn't match any existing events.
See Track Event


Forces a user into a specific variation.
See Set Forced Decision


Returns what variation the user was forced into.
See Get Forced Decision


Removes a user from a specific forced variation.
See Remove Forced Decision


Removes a user from all forced variations.
See Remove All Forced Decisions

See Also

Create User Context

Source files

The language/platform source files containing the implementation for Ruby is optimizely.rb.