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MONGOID-5654: refactor and deprecate Hash#__consolidate__ (#5740)
* refactor and deprecate Hash#__consolidate__ * fix linter complaints * another minor refactoring for optimization * remove pre-refactoring docs * fix failing specs
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‎lib/mongoid/atomic_update_preparer.rb‎

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# frozen_string_literal: true
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module Mongoid
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# A singleton class to assist with preparing attributes for atomic
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# updates.
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#
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# Once the deprecated Hash#__consolidate__ method is removed entirely,
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# these methods may be moved into Mongoid::Contextual::Mongo as private
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# methods.
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#
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# @api private
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class AtomicUpdatePreparer
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class << self
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# Convert the key/values in the attributes into a hash of atomic updates.
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# Non-operator keys are assumed to use $set operation.
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#
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# @param [ Class ] klass The model class.
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# @param [ Hash ] attributes The attributes to convert.
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#
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# @return [ Hash ] The prepared atomic updates.
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def prepare(attributes, klass)
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attributes.each_pair.with_object({}) do |(key, value), atomic_updates|
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key = klass.database_field_name(key.to_s)
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if key.to_s.start_with?('$')
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(atomic_updates[key] ||= {}).update(prepare_operation(klass, key, value))
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else
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(atomic_updates['$set'] ||= {})[key] = mongoize_for(key, klass, key, value)
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end
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end
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end
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private
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# Treats the key as if it were a MongoDB operator and prepares
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# the value accordingly.
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#
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# @param [ Class ] klass the model class
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# @param [ String | Symbol ] key the operator
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# @param [ Hash ] value the operand
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#
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# @return [ Hash ] the prepared value.
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def prepare_operation(klass, key, value)
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value.each_with_object({}) do |(key2, value2), hash|
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key2 = klass.database_field_name(key2)
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hash[key2] = value_for(key, klass, value2)
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end
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end
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# Get the value for the provided operator, klass, key and value.
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#
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# This is necessary for special cases like $rename, $addToSet and $push.
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#
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# @param [ String ] operator The operator.
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# @param [ Class ] klass The model class.
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# @param [ Object ] value The original value.
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#
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# @return [ Object ] Value prepared for the provided operator.
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def value_for(operator, klass, value)
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case operator
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when '$rename' then value.to_s
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when '$addToSet', '$push' then value.mongoize
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else mongoize_for(operator, klass, operator, value)
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end
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end
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# Mongoize for the klass, key and value.
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#
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# @param [ String ] operator The operator.
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# @param [ Class ] klass The model class.
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# @param [ String | Symbol ] key The field key.
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# @param [ Object ] value The value to mongoize.
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#
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# @return [ Object ] The mongoized value.
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def mongoize_for(operator, klass, key, value)
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field = klass.fields[key.to_s]
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return value unless field
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mongoized = field.mongoize(value)
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if Mongoid::Persistable::LIST_OPERATIONS.include?(operator) && field.resizable? && !value.is_a?(Array)
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return mongoized.first
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end
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mongoized
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end
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end
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end
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end

‎lib/mongoid/contextual/mongo.rb‎

Lines changed: 3 additions & 2 deletions
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@@ -1,6 +1,7 @@
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# frozen_string_literal: true
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# rubocop:todo all
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require 'mongoid/atomic_update_preparer'
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require "mongoid/contextual/mongo/documents_loader"
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require "mongoid/contextual/atomic"
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require "mongoid/contextual/aggregable/mongo"
@@ -817,8 +818,8 @@ def load_async
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# @return [ true | false ] If the update succeeded.
818819
def update_documents(attributes, method = :update_one, opts = {})
819820
return false unless attributes
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attributes = Hash[attributes.map { |k, v| [klass.database_field_name(k.to_s), v] }]
821-
view.send(method, attributes.__consolidate__(klass), opts)
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822+
view.send(method, AtomicUpdatePreparer.prepare(attributes, klass), opts)
822823
end
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824825
# Apply the field limitations.

‎lib/mongoid/extensions/hash.rb‎

Lines changed: 7 additions & 62 deletions
Original file line numberDiff line numberDiff line change
@@ -32,31 +32,20 @@ def __mongoize_object_id__
3232
end
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# Consolidate the key/values in the hash under an atomic $set.
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# DEPRECATED. This was never intended to be a public API and
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# the functionality will no longer be exposed once this method
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# is eventually removed.
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#
3639
# @example Consolidate the hash.
3740
# { name: "Placebo" }.__consolidate__
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#
3942
# @return [ Hash ] A new consolidated hash.
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#
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# @deprecated
4045
def __consolidate__(klass)
41-
consolidated = {}
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each_pair do |key, value|
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if key =~ /\$/
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value.keys.each do |key2|
45-
value2 = value[key2]
46-
real_key = klass.database_field_name(key2)
47-
48-
value.delete(key2) if real_key != key2
49-
value[real_key] = value_for(key, klass, real_key, value2)
50-
end
51-
consolidated[key] ||= {}
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consolidated[key].update(value)
53-
else
54-
consolidated["$set"] ||= {}
55-
consolidated["$set"].update(key => mongoize_for(key, klass, key, value))
56-
end
57-
end
58-
consolidated
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Mongoid::AtomicUpdatePreparer.prepare(self, klass)
5947
end
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Mongoid.deprecate(self, :__consolidate__)
6049

6150
# Checks whether conditions given in this hash are known to be
6251
# unsatisfiable, i.e., querying with this hash will always return no
@@ -166,50 +155,6 @@ def to_criteria
166155

167156
private
168157

169-
# Get the value for the provided operator, klass, key and value.
170-
#
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# This is necessary for special cases like $rename, $addToSet and $push.
172-
#
173-
# @param [ String ] operator The operator.
174-
# @param [ Class ] klass The model class.
175-
# @param [ String | Symbol ] key The field key.
176-
# @param [ Object ] value The original value.
177-
#
178-
# @return [ Object ] Value prepared for the provided operator.
179-
def value_for(operator, klass, key, value)
180-
case operator
181-
when "$rename" then value.to_s
182-
when "$addToSet", "$push" then value.mongoize
183-
else mongoize_for(operator, klass, operator, value)
184-
end
185-
end
186-
187-
# Mongoize for the klass, key and value.
188-
#
189-
# @api private
190-
#
191-
# @example Mongoize for the klass, field and value.
192-
# {}.mongoize_for("$push", Band, "name", "test")
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#
194-
# @param [ String ] operator The operator.
195-
# @param [ Class ] klass The model class.
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# @param [ String | Symbol ] key The field key.
197-
# @param [ Object ] value The value to mongoize.
198-
#
199-
# @return [ Object ] The mongoized value.
200-
def mongoize_for(operator, klass, key, value)
201-
field = klass.fields[key.to_s]
202-
if field
203-
val = field.mongoize(value)
204-
if Mongoid::Persistable::LIST_OPERATIONS.include?(operator) && field.resizable?
205-
val = val.first if !value.is_a?(Array)
206-
end
207-
val
208-
else
209-
value
210-
end
211-
end
212-
213158
module ClassMethods
214159

215160
# Turn the object from the ruby type we deal with to a Mongo friendly

‎spec/mongoid/atomic_update_preparer_spec.rb‎

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# frozen_string_literal: true
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require 'spec_helper'
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describe Mongoid::AtomicUpdatePreparer do
6+
describe '#prepare' do
7+
let(:prepared) { described_class.prepare(hash, Band) }
8+
9+
context 'when the hash already contains $set' do
10+
context 'when the $set is first' do
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let(:hash) do
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{ '$set' => { name: 'Tool' }, likes: 10, '$inc' => { plays: 1 } }
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end
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it 'moves the non hash values under the provided key' do
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expect(prepared).to eq(
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'$set' => { 'name' => 'Tool', 'likes' => 10 },
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'$inc' => { 'plays' => 1 }
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)
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end
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end
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context 'when the $set is not first' do
24+
let(:hash) do
25+
{ likes: 10, '$inc' => { plays: 1 }, '$set' => { name: 'Tool' } }
26+
end
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it 'moves the non hash values under the provided key' do
29+
expect(prepared).to eq(
30+
'$set' => { 'likes' => 10, 'name' => 'Tool' },
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'$inc' => { 'plays' => 1 }
32+
)
33+
end
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end
35+
end
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context 'when the hash does not contain $set' do
38+
let(:hash) do
39+
{ likes: 10, '$inc' => { plays: 1 }, name: 'Tool' }
40+
end
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42+
it 'moves the non hash values under the provided key' do
43+
expect(prepared).to eq(
44+
'$set' => { 'likes' => 10, 'name' => 'Tool' },
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'$inc' => { 'plays' => 1 }
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)
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end
48+
end
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context 'when the hash contains $rename' do
51+
let(:hash) { { likes: 10, '$rename' => { old: 'new' } } }
52+
53+
it 'preserves the $rename operator' do
54+
expect(prepared).to eq(
55+
'$set' => { 'likes' => 10 },
56+
'$rename' => { 'old' => 'new' }
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)
58+
end
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end
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context 'when the hash contains $addToSet' do
62+
let(:hash) { { likes: 10, '$addToSet' => { list: 'new' } } }
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it 'preserves the $addToSet operator' do
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expect(prepared).to eq(
66+
'$set' => { 'likes' => 10 },
67+
'$addToSet' => { 'list' => 'new' }
68+
)
69+
end
70+
end
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context 'when the hash contains $push' do
73+
let(:hash) { { likes: 10, '$push' => { list: 14 } } }
74+
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it 'preserves the $push operator' do
76+
expect(prepared).to eq(
77+
'$set' => { 'likes' => 10 },
78+
'$push' => { 'list' => 14 }
79+
)
80+
end
81+
end
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end
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end

‎spec/mongoid/extensions/hash_spec.rb‎

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@@ -163,63 +163,6 @@
163163
end
164164
end
165165

166-
describe "#__consolidate__" do
167-
168-
context "when the hash already contains the key" do
169-
170-
context "when the $set is first" do
171-
172-
let(:hash) do
173-
{ "$set" => { name: "Tool" }, likes: 10, "$inc" => { plays: 1 }}
174-
end
175-
176-
let(:consolidated) do
177-
hash.__consolidate__(Band)
178-
end
179-
180-
it "moves the non hash values under the provided key" do
181-
expect(consolidated).to eq({
182-
"$set" => { 'name' => "Tool", likes: 10 }, "$inc" => { 'plays' => 1 }
183-
})
184-
end
185-
end
186-
187-
context "when the $set is not first" do
188-
189-
let(:hash) do
190-
{ likes: 10, "$inc" => { plays: 1 }, "$set" => { name: "Tool" }}
191-
end
192-
193-
let(:consolidated) do
194-
hash.__consolidate__(Band)
195-
end
196-
197-
it "moves the non hash values under the provided key" do
198-
expect(consolidated).to eq({
199-
"$set" => { likes: 10, 'name' => "Tool" }, "$inc" => { 'plays' => 1 }
200-
})
201-
end
202-
end
203-
end
204-
205-
context "when the hash does not contain the key" do
206-
207-
let(:hash) do
208-
{ likes: 10, "$inc" => { plays: 1 }, name: "Tool"}
209-
end
210-
211-
let(:consolidated) do
212-
hash.__consolidate__(Band)
213-
end
214-
215-
it "moves the non hash values under the provided key" do
216-
expect(consolidated).to eq({
217-
"$set" => { likes: 10, name: "Tool" }, "$inc" => { 'plays' => 1 }
218-
})
219-
end
220-
end
221-
end
222-
223166
describe ".demongoize" do
224167

225168
let(:hash) do

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