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体验新版 GitCode,发现更多精彩内容 >>
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1c948680
编写于
5月 23, 2012
作者:
V
Vijay Dev
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copy edits in collection proxy docs [ci skip]
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d31b7656
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1 changed file
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18 addition
and
25 deletion
+18
-25
activerecord/lib/active_record/associations/collection_proxy.rb
...record/lib/active_record/associations/collection_proxy.rb
+18
-25
未找到文件。
activerecord/lib/active_record/associations/collection_proxy.rb
浏览文件 @
1c948680
...
...
@@ -92,6 +92,10 @@ class CollectionProxy < Relation
# # ]
#
# person.pets.select(:name) { |pet| pet.name =~ /oo/ }
# # => [
# # #<Pet id: 2, name: "Spook">,
# # #<Pet id: 3, name: "Choo-Choo">
# # ]
##
# :method: find
...
...
@@ -113,7 +117,7 @@ class CollectionProxy < Relation
# # #<Pet id: 2, name: "Spook", person_id: 1>,
# # #<Pet id: 3, name: "Choo-Choo", person_id: 1>
# # ]
#
#
# person.pets.find(1) # => #<Pet id: 1, name: "Fancy-Fancy", person_id: 1>
# person.pets.find(4) # => ActiveRecord::RecordNotFound: Couldn't find Pet with id=4
#
...
...
@@ -231,7 +235,7 @@ class CollectionProxy < Relation
#
# Returns a new object of the collection type that has been instantiated with
# attributes, linked to this object and that has already been saved (if it
# passe
d
the validations).
# passe
s
the validations).
#
# class Person
# has_many :pets
...
...
@@ -255,15 +259,14 @@ class CollectionProxy < Relation
# # #<Pet id: 2, name: "Spook", person_id: 1>,
# # #<Pet id: 3, name: "Choo-Choo", person_id: 1>
# # ]
##
# :method: create!
#
# :call-seq:
# create!(attributes = {}, options = {}, &block)
#
# Like +create+, except that if the record is invalid will
# raise an exception.
# Like +create+, except that if the record is invalid, raises an exception.
#
# class Person
# has_many :pets
...
...
@@ -340,8 +343,8 @@ class CollectionProxy < Relation
##
# :method: delete_all
#
# Deletes all the records from the collection. For +has_many+
it will do the
#
deletion
according to the strategy specified by the <tt>:dependent</tt>
# Deletes all the records from the collection. For +has_many+
asssociations,
#
the deletion is done
according to the strategy specified by the <tt>:dependent</tt>
# option. Returns an array with the deleted records.
#
# If no <tt>:dependent</tt> option is given, then it will follow the
...
...
@@ -501,7 +504,7 @@ class CollectionProxy < Relation
# You can pass +Fixnum+ or +String+ values, it finds the records
# responding to the +id+ and then deletes them from the database.
#
# person.pets.size # => 3
# person.pets.size # => 3
# person.pets
# # => [
# # #<Pet id: 4, name: "Benny", person_id: 1>,
...
...
@@ -529,7 +532,7 @@ class CollectionProxy < Relation
# person.pets # => []
#
# Pet.find(4, 5, 6) # => ActiveRecord::RecordNotFound: Couldn't find all Pets with IDs (4, 5, 6)
##
# :method: size
#
...
...
@@ -541,11 +544,7 @@ class CollectionProxy < Relation
# end
#
# person.pets.size # => 3
# # Executes:
# #
# # SELECT COUNT(*)
# # FROM "pets"
# # WHERE "pets"."person_id" = 1
# # executes something like SELECT COUNT(*) FROM "pets" WHERE "pets"."person_id" = 1
#
# person.pets # This will execute a SELECT * FROM query
# # => [
...
...
@@ -562,24 +561,18 @@ class CollectionProxy < Relation
# :method: length
#
# Returns the size of the collection calling +size+ on the target.
# If the collection has been already loaded +length+ and +size+ are
# equivalent. If not and you are going to need the records anyway this
# method will take one less query because loads the collection. Otherwise
# +size+ is more efficient.
# If the collection has been already loaded, +length+ and +size+ are
# equivalent.
#
# class Person < ActiveRecord::Base
# has_many :pets
# end
#
# person.pets.length # => 3
# # Executes:
# #
# # SELECT "pets".*
# # FROM "pets"
# # WHERE "pets"."person_id" = 1
# # executes something like SELECT "pets".* FROM "pets" WHERE "pets"."person_id" = 1
#
# # Because the collection is loaded, you can
# # call the collection with
out execute a query
:
# # call the collection with
no additional queries
:
# person.pets
# # => [
# # #<Pet id: 1, name: "Fancy-Fancy", person_id: 1>,
...
...
@@ -705,7 +698,7 @@ class CollectionProxy < Relation
:sum
,
:count
,
:size
,
:length
,
:empty?
,
:any?
,
:many?
,
:include?
,
:to
=>
:@association
def
initialize
(
association
)
@association
=
association
super
association
.
klass
,
association
.
klass
.
arel_table
...
...
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