Class: PgSearch::Normalizer

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_search/normalizer.rb

Constant Summary collapse

DISALLOWED_CHARACTERS = 
"['?\\:]"

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Normalizer

Arguments

config

Search configuration whose ignore list controls accent normalization.



9
10
11
 
# File 'lib/pg_search/normalizer.rb', line 9

def initialize(config)
  @config = config
end

Instance Method Details

#add_normalization(expression) ⇒ Object

Applies configured accent normalization, preserving the input expression without an unaccent wrapper when accents are not ignored.

Arguments

expression

An Arel node, attribute, or trusted SQL String. A String is an SQL expression, not a value to quote.

Returns a composable Arel expression.

Raises

TypeError

If expression is not an Arel node, attribute, or String.



28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/pg_search/normalizer.rb', line 28

def add_normalization(expression)
  node = to_node(expression)
  return node unless config.ignore.include?(:accents)

  Arel::Nodes::NamedFunction.new(
    "regexp_replace",
    [
      Arel::Nodes::NamedFunction.new(PgSearch.unaccent_function, [node]),
      Arel::Nodes.build_quoted(DISALLOWED_CHARACTERS),
      Arel::Nodes.build_quoted(""),
      Arel::Nodes.build_quoted("g")
    ]
  )
end