Class: ActiveRecord::Relation::HashMerger

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/relation/merger.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(relation, hash) ⇒ HashMerger

Returns a new instance of HashMerger.



10
11
12
13
14
15
 
# File 'lib/active_record/relation/merger.rb', line 10

def initialize(relation, hash)
  hash.assert_valid_keys(*Relation::VALUE_METHODS)

  @relation = relation
  @hash     = hash
end

Instance Attribute Details

#hash ⇒ Object (readonly)

Returns the value of attribute hash.



8
9
10
 
# File 'lib/active_record/relation/merger.rb', line 8

def hash
  @hash
end

#relation ⇒ Object (readonly)

Returns the value of attribute relation.



8
9
10
 
# File 'lib/active_record/relation/merger.rb', line 8

def relation
  @relation
end

Instance Method Details

#merge ⇒ Object

:nodoc:



17
18
19
 
# File 'lib/active_record/relation/merger.rb', line 17

def merge #:nodoc:
  Merger.new(relation, other).merge
end

#other ⇒ Object

Applying values to a relation has some side effects. E.g. interpolation might take place for where values. So we should build a relation to merge in rather than directly merging the values.



25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
 
# File 'lib/active_record/relation/merger.rb', line 25

def other
  other = Relation.create(
    relation.klass,
    table: relation.table,
    predicate_builder: relation.predicate_builder
  )
  hash.each { |k, v|
    if k == :joins
      if Hash === v
        other.joins!(v)
      else
        other.joins!(*v)
      end
    elsif k == :select
      other._select!(v)
    else
      other.send("#{k}!", v)
    end
  }
  other
end