Class: ActiveRecord::HierarchicalQuery::CTE::Query

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(builder) ⇒ Query

Returns a new instance of Query.

Parameters:



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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 21

def initialize(builder)
  @builder = builder
  @orderings = Orderings.new(builder)
  @columns = Columns.new(self)
  @cycle_detector = CycleDetector.new(self)
end

Instance Attribute Details

#builder ⇒ Object (readonly)

Returns the value of attribute builder.



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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 13

def builder
  @builder
end

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 13

def columns
  @columns
end

#cycle_detector ⇒ Object (readonly)

Returns the value of attribute cycle_detector.



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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 13

def cycle_detector
  @cycle_detector
end

#orderings ⇒ Object (readonly)

Returns the value of attribute orderings.



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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 13

def orderings
  @orderings
end

Instance Method Details

#arel ⇒ Arel::SelectManager

Returns:

  • (Arel::SelectManager) 


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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 33

def arel
  apply_ordering { build_arel }
end

#build_join(relation, subquery_alias) ⇒ Object 



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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 28

def build_join(relation, subquery_alias)
  JoinBuilder.new(self, relation, subquery_alias).build
end

#join_conditions ⇒ Object 



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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 42

def join_conditions
  builder.connect_by_value[recursive_table, table]
end

#order_clause ⇒ Object 



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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 46

def order_clause
  recursive_table[orderings.column_name].asc
end

#recursive_table ⇒ Arel::Table

Returns:

  • (Arel::Table) 


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# File 'lib/active_record/hierarchical_query/cte/query.rb', line 38

def recursive_table
  @recursive_table ||= Arel::Table.new("#{table.name}__recursive")
end