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
612 def order_by(order, &block)
613   sql = super(order, &block)
614   if sql
615     field, _ = find_field_for_order_by(order, &block)
616     sql += sql.include?('DESC') ? ' NULLS LAST ' : ' NULLS FIRST ' if !field.nil? && field.column.null
617   end
618   sql
619 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
597 def sql_operator(operator, field)
598   raise ScopedSearch::QueryNotSupported, "the operator '#{operator}' is not supported for field type '#{field.type}'" if !field.virtual? and [:like, :unlike].include?(operator) and !field.textual?
599   return '@@' if [:like, :unlike].include?(operator) && field.full_text_search
600   case operator
601     when :like   then 'ILIKE'
602     when :unlike then 'NOT ILIKE'
603     else super(operator, field)
604   end
605 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
584 def sql_test(field, operator, value, lhs, &block)
585   if [:like, :unlike].include?(operator) && field.full_text_search
586     yield(:parameter, value)
587     negation = (operator == :unlike) ? "NOT " : ""
588     locale = (field.full_text_search == true) ? 'english' : field.full_text_search
589     return "#{negation}to_tsvector('#{locale}', #{field.to_sql(operator, &block)}) #{self.sql_operator(operator, field)} to_tsquery('#{locale}', ?)"
590   else
591     super
592   end
593 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
608 def to_not_sql(rhs, definition, &block)
609   "NOT COALESCE(#{rhs.to_sql(self, definition, &block)}, false)"
610 end