Class: ActiveRecord::HierarchicalQuery::JoinBuilder

Inherits:

Object

• Object
• ActiveRecord::HierarchicalQuery::JoinBuilder

Defined in:

lib/active_record/hierarchical_query/join_builder.rb

Defined Under Namespace

Classes: SubqueryAlias

Instance Method Summary

• #build ⇒ Object
• #initialize(query, join_to, subquery_alias, options = {}) ⇒ JoinBuilder constructor

  A new instance of JoinBuilder.

Constructor Details

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

Returns a new instance of JoinBuilder.

Parameters:

• query (ActiveRecord::HierarchicalQuery::Query)
• join_to (ActiveRecord::Relation)
• subquery_alias (#to_s)
• options (Hash) (defaults to: {}) —

  (:outer_join_hierarchical, :union_type)

# 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, ActiveRecord::Base)
  @options = options
end

Instance Method Details

#build ⇒ Object

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

def build
  relation = @relation.joins(joined_arel_node)
  # copy bound variables from inner subquery (remove duplicates)
  relation.bind_values |= bind_values
  # add ordering by "__order_column"
  relation.order_values += order_columns if ordered?

  relation
end