Multisearch pg_search with Rails

Question

I have a question about multi field search using pg_search gem. What I want to do is make a query in multiples fields, so I have the following code in my Client model:

  pg_search_scope :search,
    :against => [:name, :email],
    :using => [:trigram, :tsearch],
    :ignoring => :accents

For testing I have:

Client 1

name: "Anna"

email: "mycompany@foo.com"

Then I searched with Client.search("anna") and no results are returned. Or Client.search("nna") also no results found.

Any suggestion here ?

Thanks in advance.

Update 1

I set the threshold manually and it works:

  pg_search_scope :search,
    :against => [:name, :email],
    using: {
            tsearch: {},
            trigram:    {threshold:  0.1}
           }