Class: ActiveRecord::HierarchicalQuery::JoinBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/hierarchical_query/join_builder.rb

Defined Under Namespace

Classes: SubqueryAlias

Instance Method Summary collapse

Constructor Details

#initialize(query, join_to, subquery_alias, options = {}) ⇒ JoinBuilder

Returns a new instance of JoinBuilder.

Parameters:



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# File 'lib/active_record/hierarchical_query/join_builder.rb', line 10

def initialize(query, join_to, subquery_alias, options = {})
  @query = query
  @builder = CTE::QueryBuilder.new(query, options: options)
  @relation = join_to
  @alias = Arel::Table.new(subquery_alias)
  @options = options
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/active_record/hierarchical_query/join_builder.rb', line 18

def build
  if ActiveRecord.gem_version >= Gem::Version.new('5.2.0')
    relation = @relation

    # add ordering by "__order_column"
    relation.order_values += order_columns if ordered?

    relation = relation.joins(joined_arel_node)

    relation
  else
    relation = @relation

    # add ordering by "__order_column"
    relation.order_values += order_columns if ordered?

    relation = relation.joins(joined_arel_node)

    # copy bound variables from inner subquery
    relation.bind_values += bind_values

    relation
  end
end