当使用mysql2进行查询时,我总是收到警告
/usr/local/lib/ruby/gems/1.9.1/gems/mysql2-0.2.6/lib/active_record/connection_adapters/mysql2_adapter.rb:463: warning: :database_timezone option must be :utc or :local - defaulting to :local
我确实看到了Timezones的一个选项
Mysql2现在支持两个时区选项:
:database_timezone - this is the timezone Mysql2 will assume fields are already stored as, and will use this when creating the initial Time objects in ruby
:application_timezone - this is the timezone Mysql2 will convert to before finally handing back to the caller
有谁知道,如何使用,以及在哪里设置此选项？
谢谢.
我尝试mysql2在Windows 7 32位上安装gem.
我跑:
gem install mysql2
我收到以下错误:
ERROR: Error installing mysql2:
The 'mysql2' native gem requires installed build tools.
Please update your PATH to include build tools or download the DevKit
from 'http://rubyinstaller.org/downloads' and follow the instructions
at 'http://github.com/oneclick/rubyinstaller/wiki/Development-Kit'
任何可能导致此错误的想法,以及如何解决这个问题？
UPDATE
我做了这里描述的所有事情,但我无法弄清楚最后一步:
gem install mysql2 --
'--with-mysql-lib="c:\Program Files\MySQL\MySQL Server 5.1\lib\opt"
--with-mysql-include="c:\Program Files\MySQL\MySQL Server 5.1\include"'
我知道我应该改变系统中正确路径的路径,但是在WAMP MySQL安装中找不到lib\opt和include目录.我使用WAMP 2.1.
请指教.
我使用sqlite构建了我的Rails 3应用程序,现在我正在尝试切换到MySQL.
我创建了一个新的MySQL数据库,相应地更改了database.yml,我在我的gemfile(gem 'mysql2', '< 0.3')中添加了一个旧版本的mysql2 gem,它应该可以更好地使用Rails 3.
我可以启动开发服务器.当我访问页面时,我得到一个Mysql2::Error(Table 'twitter_quiz_development.users' doesn't exist).哪个没问题 - 我仍然需要将架构添加到新的数据库中.这是我遇到麻烦的地方:
rake db:schema:load返回这个讨厌的错误.
这里找到的解决方案对我不起作用.gem pristine --all归还这个.
如果有帮助,我正在运行Ubuntu 11.
看来该错误与JSON有关,但我不知道如何解决这个问题.谢谢.
我在OS X Lion上使用MAMP2,rvm,我无法使用mysql2 gem来使用我的Rails应用程序.
我已经关注了这篇博客文章http://blog.mirotin.net/35/mamp-1-9-5-mysql-5-5-9-and-ruby-mysql2和这篇http://www.pa -ket.com/blog/show/12-osx-ruby-mysql2-gem-python-mysqldb-using-mamp
这些是步骤:
$ cd /tmp
$ mv /Users/yourname/Desktop/mysql-5.5.9.tar.gz .
$ tar xf mysql-5.5.9.tar.gz
$ cd mysql-5.5.9
$ brew install cmake
$ cmake . -DMYSQL_UNIX_ADDR=/Applications/MAMP/tmp/mysql/mysql.sock -DCMAKE_INSTALL_PREFIX=/Applications/MAMP/Library
此步骤失败:
$ make -j 3
在/tmp/mysql-5.5.9/CMakeFiles/Makefile2中对'my_atomic-t.dir'进行单元测试后,make -j 3'就可以了.
$ cp libmysql/*.dylib /Applications/MAMP/Library/lib/
$ mkdir -p /Applications/MAMP/Library/include/mysql
$ cp include/* /Applications/MAMP/Library/include/mysql
$ env ARCHFLAGS="-arch x86_64" gem install mysql2 -v 0.2.11 -- --with-mysql-config=/Applications/MAMP/Library/bin/mysql_config
Building native extensions. This could take a while...
Successfully installed mysql2-0.2.11
1 gem installed
Installing ri …我是RoR的新手,我正在尝试安装Mysql2 -v'0.3.11'.我有OS X Mountain Lion,rails 3.2.6,ruby 1.9.3.
以下是我得到的错误.我到处看,没有找到任何东西.
$gem install mysql2 -v '0.3.11'
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/Users/curiosity/.rvm/rubies/ruby-1.9.3-p125/bin/ruby extconf.rb
checking for rb_thread_blocking_region()... yes
checking for rb_wait_for_single_fd()... yes
checking for mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
creating Makefile
make
compiling client.c
In file included from client.c:1:
In file included from ./mysql2_ext.h:8:
In file included from /Users/curiosity/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/ruby.h:32:
/Users/curiosity/.rvm/rubies/ruby-1.9.3-p125/include/ruby-1.9.1/ruby/ruby.h:105:37: error: 'ruby_check_sizeof_long' declared as an …当使用ActiveRecord运行mysql查询时Class.connection.execute('query here'),结果是一个数组,而不是postgres中的哈希.这是使用mysql和mysql2适配器测试的,即使默认情况mysql2是将查询结果作为哈希返回.
如何ActiveRecord更改连接上的配置选项以将查询结果作为哈希返回？我可以不用ActiveRecord它,我应该使用原始mysql2客户端吗？
我目前正在构建一个需要mysql2 gem的RoR项目.我成功安装了宝石.因为它出现在我的宝石列表中.
[root@vc2cmmka035538n simple_cms]# gem list
*** LOCAL GEMS ***
actionmailer (3.2.3)
actionpack (3.2.3)
activemodel (3.2.3)
activerecord (3.2.3)
activeresource (3.2.3)
activesupport (3.2.14, 3.2.3)
arel (3.0.2)
bigdecimal (1.1.0)
builder (3.2.2, 3.0.0)
bundler (1.1.5)
c2c_linux_patch_utilities (0.29.0)
chef (11.6.2)
chef-zero (1.6)
debug_me (0.5.1)
diff-lcs (1.1.3)
erubis (2.7.0)
gelf (1.1.3)
hashie (2.0.5)
highline (1.6.19)
hike (1.2.1)
i18n (0.6.5)
io-console (0.3)
ipaddress (0.8.0)
journey (1.0.3)
json (1.7.7, 1.5.5)
knife-lastrun (0.0.4)
mail (2.4.4)
mime-types (1.25)
minitest (2.5.1)
mixlib-authentication (1.3.0)
mixlib-cli (1.3.0)
mixlib-config (1.1.2)
mixlib-log (1.6.0)
mixlib-shellout …有谁知道造成这种情况的原因以及如何解决它？我正在尝试为我的项目安装 ruby gem，这是一个在 Rails 3 上运行的旧项目，但我在 ubuntu 20.04 上运行。我所做的基本上就是运行捆绑安装，然后我就可以让除了这个 ruby gem 之外的所有东西都工作了。请指教！
\ncurrent directory: /home/decil/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/mysql2-0.3.21/ext/mysql2\nmake "DESTDIR=" clean\n\ncurrent directory: /home/decil/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/mysql2-0.3.21/ext/mysql2\nmake "DESTDIR="\ncompiling client.c\nclient.c: In function \xe2\x80\x98nogvl_read_query_result\xe2\x80\x99:\nclient.c:439:3: error: unknown type name \xe2\x80\x98my_bool\xe2\x80\x99; did you mean \xe2\x80\x98bool\xe2\x80\x99?\n 439 | my_bool res = mysql_read_query_result(client);\n | ^~~~~~~\n | bool\nclient.c: In function \xe2\x80\x98rb_query\xe2\x80\x99:\nclient.c:687:14: warning: passing argument 1 of \xe2\x80\x98rb_rescue2\xe2\x80\x99 from incompatible pointer type [-Wincompatible-pointer-types]\n 687 | rb_rescue2(do_send_query, (VALUE)&args, disconnect_and_raise, self, rb_eException, (VALUE)0);\n | ^~~~~~~~~~~~~\n | |\n | VALUE (*)(void *) {aka long unsigned int (*)(void *)}\nIn …我正在使用 ruby 3.0.1p64 并使用 macOS bigsur 11.04 mysql 安装并运行
捆绑安装要求我安装 mysql2
我正在尝试像这样安装 mysql2 gem：
sudo gem install mysql2 -v '0.5.3' --source 'https://rubygems.org/'
我得到这个：
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
current directory: /Users/henri/.rbenv/versions/3.0.1/lib/ruby/gems/3.0.0/gems/mysql2-0.5.3/ext/mysql2
/Users/henri/.rbenv/versions/3.0.1/bin/ruby -I /Users/henri/.rbenv/versions/3.0.1/lib/ruby/3.0.0 -r ./siteconf20210617-53969-y4phap.rb extconf.rb
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
checking for rb_wait_for_single_fd()... yes
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries …我在 Windows 8.1 机器上安装 mysql2 gem 时遇到了一些问题。我按照这篇文章中的说明进行操作：
安装mysql2gem，我没有收到任何错误消息。
我跟着这个
bundle install
命令，并确认安装了以下 gems（使用 bundle show），确认我安装了以下 gems：
Using devise (3.2.2)
Using mysql2 (0.3.14)
然后我尝试这样做：
rails generate devise:install
这就是我得到的：
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql2-0.3.14/lib/mysql2.rb:8:in `require': 126: The specified module could not be found.
- C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql2-0.3.14/lib/mysql2/mysql2.so (LoadError)
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/mysql2-0.3.14/lib/mysql2.rb:8:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.5.1/lib/bundler/runtime.rb:76:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.5.1/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.5.1/lib/bundler/runtime.rb:72:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.5.1/lib/bundler/runtime.rb:72:in `block in require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.5.1/lib/bundler/runtime.rb:61:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.5.1/lib/bundler/runtime.rb:61:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.5.1/lib/bundler.rb:131:in `require' …