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体验新版 GitCode,发现更多精彩内容 >>
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94130133
编写于
5月 11, 2016
作者:
R
Rémy Coutable
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电子邮件补丁
差异文件
Remove Rails monkey-patches now that we're using Rails 4.2.6
Signed-off-by:
N
Rémy Coutable
<
remy@rymai.me
>
上级
e77a9a34
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config/initializers/monkey_patch.rb
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## This patch is from rails 4.2-stable. Remove it when 4.2.6 is released
## https://github.com/rails/rails/issues/21108
module
ActiveRecord
module
ConnectionAdapters
class
AbstractMysqlAdapter
<
AbstractAdapter
# SHOW VARIABLES LIKE 'name'
def
show_variable
(
name
)
variables
=
select_all
(
"select @@
#{
name
}
as 'Value'"
,
'SCHEMA'
)
variables
.
first
[
'Value'
]
unless
variables
.
empty?
rescue
ActiveRecord
::
StatementInvalid
nil
end
# MySQL is too stupid to create a temporary table for use subquery, so we have
# to give it some prompting in the form of a subsubquery. Ugh!
def
subquery_for
(
key
,
select
)
subsubselect
=
select
.
clone
subsubselect
.
projections
=
[
key
]
subselect
=
Arel
::
SelectManager
.
new
(
select
.
engine
)
subselect
.
project
Arel
.
sql
(
key
.
name
)
# Materialized subquery by adding distinct
# to work with MySQL 5.7.6 which sets optimizer_switch='derived_merge=on'
subselect
.
from
subsubselect
.
distinct
.
as
(
'__active_record_temp'
)
end
end
end
end
module
ActiveRecord
module
ConnectionAdapters
class
MysqlAdapter
<
AbstractMysqlAdapter
ADAPTER_NAME
=
'MySQL'
.
freeze
# Get the client encoding for this database
def
client_encoding
return
@client_encoding
if
@client_encoding
result
=
exec_query
(
"select @@character_set_client"
,
'SCHEMA'
)
@client_encoding
=
ENCODINGS
[
result
.
rows
.
last
.
last
]
end
end
end
end
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