How does it work with just a few characters in search string?

[szymon33]

I use in my app:

• Rails 4.2.6
• Postgresql
• acts_as_indexed (0.8.3) with initializer

  ActsAsIndexed.configure do |config|
  config.min_word_size = 1
  end

  implemented to model Product.rb by

acts_as_indexed fields: [:name]

Assuming the follwoing product name "Uniwersalna pokrywka Stoneline"

The following expression will find the record:

Product.with_query('Uniwe')

Below expression will NOT find anything. Just one character less though.

Product.with_query('Uniw')

why?

[dougal]

min_word_size is meant as a configuration option to prevent abuse. With min_word_size set to 1, a query of U would match the letter U on it's own, but not Uniwe.

A prefix query, ^Uniwe, will match Uniwersalna even at the default min_word_size of 3.

[szymon33]

Thank you very much @dougal for your prompt reply. You are right. But how about searching inside text with search string i. ex. 'sal' ?

[dougal]

No problem.

There is no support for mid-atom matching.

The index is broken up into groups of atoms, in directories by their prefix. It is only efficient to search for either entire atoms, or prefixes.

[szymon33]

That is exactly what I need. Thanks and wish you a Happy New Year!