An example of how to exclude blocked users from search results.

search_blocked_users.rb

# SETUP.
#
require 'picky'

# Users have a name and a list of blocked_ids.
#
User = Struct.new(:id, :name, :blocked_ids) do
  
  # Generates a list of users which have not blocked this user.
  # Note: Also excludes self.
  #
  def visible_to
    (Users.select { |user| !user.blocked_ids.include? id } - [self]).map!(&:id).map!(&:to_s)
  end
  
end

Users = [
  User.new(1, 'Joost Test', [3]),
  User.new(2, 'Florian Test', [4, 5]),
  User.new(3, 'Peer Test', [1]),
  User.new(4, 'Poon Test', [6]),
  User.new(5, 'Arie Test', [3]),
  User.new(6, 'Hendrik Test', []),
]

puts "Joost is not visible to Peer, since Peer has blocked Joost."
puts "Joost is visible to the following ids:"
p Users.first.visible_to
puts "So, not visible to himself or Peer."

data = Picky::Index.new :users do
  category :id
  category :name
  category :visible_to, tokenize: false
end

# Add users to index.
#
Users.each { |user| data.replace user }


# SEARCHING.
#

puts
puts "Let's run a few searches:"

users = Picky::Search.new data

print 'Joost does not find Peer or himself: '
p users.search('visible_to:1 test').ids
print 'Peer does not find Joost or himself: '
p users.search('visible_to:3 test').ids
print 'Florian does not find himself or Poon or Arie: '
p users.search('visible_to:2 test').ids

print 'Hendrik does not find himself: '
p users.search('visible_to:6 hendrik').ids
print 'But Arie does find Hendrik: '
p users.search('visible_to:5 hendrik').ids
print 'However, Poon has blocked Hendrik: '
p users.search('visible_to:4 hendrik').ids