markdown Configurando o PostgreSQL

Posted 2021-05-06

## Configurando o PostgreSQL ##

Gere uma migration (para alterar nosso banco de dados) para incluir o Multisearch "pg_search" rodando.

```text
rails g ​pg_search:migration:​multisearch
```

Altere a migration com algumas informações para tornar nossa busca ainda mais robusta:

```ruby
class​ ​CreatePgSearchDocuments​ < ActiveRecord::Migration[5.2]
  def​ ​self​.​up
    say_with_time(​"Creating table for pg_search multisearch"​) ​do
    create_table ​:pg_search_documents​ ​do​ |t|
    t.text ​:content
    t.belongs_to ​:searchable​, ​:polymorphic​ => ​true​, ​:index​ => ​true t.timestamps ​null:​ ​false
  ​end 
​end
​
say_with_time(​"Adding PG Extensions"​) ​do
execute ​"CREATE EXTENSION IF NOT EXISTS pg_trgm;"
execute ​"CREATE EXTENSION IF NOT EXISTS fuzzystrmatch;" ​end
​ ​end
​def​ ​self​.​down
say_with_time(​"Dropping table for pg_search multisearch"​) ​do
drop_table ​:pg_search_documents ​end
say_with_time(​"Dropping PG Extensions"​) ​do
execute ​"DROP EXTENSION IF EXISTS pg_trgm;" execute ​"DROP EXTENSION IF EXISTS fuzzystrmatch;"
​end ​end
end
```

Agora, devemos dizer para a "gem" pg_search que ela poderá trabalhar com essas duas extensões,
portanto precisaremos criar um arquivo de config:

```ruby
config/initializerers/pgmultisearch.rb

PgSearch.multisearch_options = {
​using:​ {
​tsearch:​ { },​any_word:​ ​true
} ​trigram:​ {} }
```