user.rb

include Tire::Model::Search
index_name INDEX_NAME

# Update index only if user is active
after_save do
  tire.update_index if self.active == true
end

# Update index only if user is active
after_destroy do
  tire.update_index if self.active == true
end

settings analysis: {
  filter: {
    ngram_filter: {
      type: "edgeNGram",
      min_gram: 2,
      max_gram: 6,
      side: 'front'
    }
  },
  analyzer: {
    ngram_analyzer: {
      tokenizer: "lowercase",
      filter: ["ngram_filter"],
      type: "custom"
    }
  }
} do
  # Mapping
  mapping do
    indexes :id, type: 'integer'
    indexes :name, type: 'string', analyzer: 'ngram_analyzer'
    indexes :active, type: 'boolean'
    indexes :avatar_small, type: 'string'
  end
end

def to_indexed_json
  { id: self.id, name: self.name, active: self.active, avatar_small: self.avatar_url(:small)}.to_json
end

def self.search(query)
  tire.search do
    query {string "name:#{query}"} if query.present?
  end
end