Module: ActiveRecord::QueryMethods

Defined in:
lib/active_record_cte/relation/query_methods.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#is_recursive ⇒ Object

Returns the value of attribute is_recursive.



3
4
5
 
# File 'lib/active_record_cte/relation/query_methods.rb', line 3

def is_recursive
  @is_recursive
end

#with_values ⇒ Object

Returns the value of attribute with_values.



3
4
5
 
# File 'lib/active_record_cte/relation/query_methods.rb', line 3

def with_values
  @with_values
end

Instance Method Details

#build_arel_with_cte ⇒ Object 



43
44
45
46
47
 
# File 'lib/active_record_cte/relation/query_methods.rb', line 43

def build_arel_with_cte
  arel = build_arel_without_cte
  build_with_clause(arel) unless @with_values.empty?
  arel
end

#build_with_clause(arel) ⇒ Object 



22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/active_record_cte/relation/query_methods.rb', line 22

def build_with_clause(arel)
  ctes = with_values.map do |cte_query|
    table = Arel::Table.new(cte_query[0])
    query = cte_query[1]

    case query
    when Arel::Nodes::Union
      Arel::Nodes::As.new(table, query)
    else
      raise 'Not Implemented!'
    end

  end

  if is_recursive
    arel.with(:recursive, *ctes)
  else
    arel.with(*ctes)
  end
end

#with(query) ⇒ Object 



5
6
7
8
9
10
11
 
# File 'lib/active_record_cte/relation/query_methods.rb', line 5

def with(query)
  return self if query.blank?

  relation = clone
  relation.with_values << query.flatten
  relation
end

#with_recursive(query) ⇒ Object 



13
14
15
16
17
18
19
20
 
# File 'lib/active_record_cte/relation/query_methods.rb', line 13

def with_recursive(query)
  return self if query.blank?

  relation = clone
  relation.is_recursive = true
  relation.with_values << query.flatten
  relation
end