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 



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

def merge
  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
 
# 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 do |k, v|
    k = :_select if k == :select
    if Array === v
      other.public_send("#{k}!", *v)
    else
      other.public_send("#{k}!", v)
    end
  end
  other
end