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6126f02c
编写于
8月 05, 2012
作者:
J
Jon Leighton
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Merge pull request #7270 from beerlington/use_exists_for_empty
Changing AR:CollectionAssociation#empty? to use #exists?
上级
daf9f9ff
d1f75905
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1 changed file
with
11 addition
and
3 deletion
+11
-3
activerecord/lib/active_record/associations/collection_association.rb
.../lib/active_record/associations/collection_association.rb
+11
-3
未找到文件。
activerecord/lib/active_record/associations/collection_association.rb
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6126f02c
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...
@@ -270,12 +270,20 @@ def length
load_target
.
size
end
# Returns true if the collection is empty. Equivalent to
# <tt>collection.size.zero?</tt>. If the collection has not been already
# Returns true if the collection is empty.
#
# If the collection has been loaded or the <tt>:counter_sql</tt> option
# is provided, it is equivalent to <tt>collection.size.zero?</tt>. If the
# collection has not been loaded, it is equivalent to
# <tt>collection.exists?</tt>. If the collection has not already been
# loaded and you are going to fetch the records anyway it is better to
# check <tt>collection.length.zero?</tt>.
def
empty?
size
.
zero?
if
loaded?
||
options
[
:counter_sql
]
size
.
zero?
else
!
scope
.
exists?
end
end
# Returns true if the collections is not empty.
...
...
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