class ScopedSearch::QueryBuilder::PostgreSQLAdapter

The PostgreSQLAdapter make sure that searches are case sensitive when using the like/unlike operators, by using the PostrgeSQL-specific ILIKE operator instead of LIKE.

Public Instance Methods

order_by(order, &block) click to toggle source
Calls superclass method ScopedSearch::QueryBuilder#order_by
# File lib/scoped_search/query_builder.rb, line 549
def order_by(order, &block)
  sql = super(order, &block)
  if sql
    field, _ = find_field_for_order_by(order, &block)
    sql += sql.include?('DESC') ? ' NULLS LAST ' : ' NULLS FIRST ' if !field.nil? && field.column.null
  end
  sql
end
sql_operator(operator, field) click to toggle source

Switches out the default LIKE operator in the default sql_operator method for ILIKE or @@ if full text searching is enabled.

Calls superclass method ScopedSearch::QueryBuilder#sql_operator
# File lib/scoped_search/query_builder.rb, line 534
def sql_operator(operator, field)
  raise ScopedSearch::QueryNotSupported, "the operator '#{operator}' is not supported for field type '#{field.type}'" if [:like, :unlike].include?(operator) and !field.textual?
  return '@@' if [:like, :unlike].include?(operator) && field.full_text_search
  case operator
    when :like   then 'ILIKE'
    when :unlike then 'NOT ILIKE'
    else super(operator, field)
  end
end
sql_test(field, operator, value, lhs) { |:parameter, value| ... } click to toggle source

Switches out the default query generation of the sql_test method if full text searching is enabled and a text search is being performed.

Calls superclass method ScopedSearch::QueryBuilder#sql_test
# File lib/scoped_search/query_builder.rb, line 521
def sql_test(field, operator, value, lhs, &block)
  if [:like, :unlike].include?(operator) && field.full_text_search
    yield(:parameter, value)
    negation = (operator == :unlike) ? "NOT " : ""
    locale = (field.full_text_search == true) ? 'english' : field.full_text_search
    return "#{negation}to_tsvector('#{locale}', #{field.to_sql(operator, &block)}) #{self.sql_operator(operator, field)} to_tsquery('#{locale}', ?)"
  else
    super
  end
end
to_not_sql(rhs, definition, &block) click to toggle source

Returns a NOT (…) SQL fragment that negates the current AST node's children

# File lib/scoped_search/query_builder.rb, line 545
def to_not_sql(rhs, definition, &block)
  "NOT COALESCE(#{rhs.to_sql(self, definition, &block)}, false)"
end