我正在尝试安装mysql2(版本0.4.5)并且我正在使用Rails 5.0.2,Ruby 2.3.1
我已经使用 homebrew(版本 8.0.11)安装了 mysql 服务器并启动 mysql:
brew install mysql
brew services start mysql
Gemfile.rb
gem 'mysql2'
当我尝试安装 gem mysql2 时,出现以下错误
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/gomathi/.rvm/gems/ruby-2.3.1@connector/gems/mysql2-0.4.5/ext/mysql2
creating Makefile
current directory: /Users/gomathi/.rvm/gems/ruby-2.3.1@connector/gems/mysql2-0.4.5/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/gomathi/.rvm/gems/ruby-2.3.1@connector/gems/mysql2-0.4.5/ext/mysql2
make "DESTDIR="
compiling client.c
In file included from client.c:1:
In file included from ./mysql2_ext.h:41:
./result.h:24:3: error: unknown type name 'my_bool'
my_bool *is_null;
^
./result.h:25:3: error: unknown type name 'my_bool'
my_bool *error;
^
client.c:507:3: error: use of undeclared identifier 'my_bool'
my_bool res = mysql_read_query_result(client);
^
client.c:509:19: error: use of undeclared identifier 'res'
return (void *)(res == 0 ? Qtrue : Qfalse);
^
client.c:828:3: error: use of undeclared identifier 'my_bool'
my_bool boolval;
^
client.c:859:7: error: use of undeclared identifier 'boolval'
boolval = (value == Qfalse ? 0 : 1);
^
client.c:860:17: error: use of undeclared identifier 'boolval'
retval = &boolval;
^
client.c:863:10: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
case MYSQL_SECURE_AUTH:
^~~~~~~~~~~~~~~~~
MYSQL_DEFAULT_AUTH
/usr/local/Cellar/mysql/8.0.11/include/mysql/mysql.h:188:3: note: 'MYSQL_DEFAULT_AUTH' declared here
MYSQL_DEFAULT_AUTH,
^
client.c:864:7: error: use of undeclared identifier 'boolval'
boolval = (value == Qfalse ? 0 : 1);
^
client.c:865:17: error: use of undeclared identifier 'boolval'
retval = &boolval;
^
client.c:896:38: error: use of undeclared identifier 'boolval'
wrapper->reconnect_enabled = boolval;
^
client.c:1285:38: error: use of undeclared identifier 'MYSQL_SECURE_AUTH'; did you mean 'MYSQL_DEFAULT_AUTH'?
return _mysql_client_options(self, MYSQL_SECURE_AUTH, value);
^~~~~~~~~~~~~~~~~
MYSQL_DEFAULT_AUTH
/usr/local/Cellar/mysql/8.0.11/include/mysql/mysql.h:188:3: note: 'MYSQL_DEFAULT_AUTH' declared here
MYSQL_DEFAULT_AUTH,
^
12 errors generated.
make: *** [client.o] Error 1
make failed, exit code 2
我怎样才能完成工作?
您正在安装旧版本的 gem (0.4.5)。我有同样的问题(使用 0.4.3)。安装版本 0.4.10 为我解决了这个问题。
试试这个:
gem install mysql2 -v 0.4.10
如果安装干净,您必须更新您的
Gemfile
才能需要此版本:
gem 'mysql2', '~> 0.4.10'
不要安装较新版本的 gem(即 0.5.x),它们无法与 Rails 4 或旧版本的 Rails 5(5.0.7/5.1.6 之前)一起使用(请参阅https:/ /github.com/brianmario/mysql2/issues/950)。
根据MySQL 5.7文档
MYSQL_SECURE_AUTH
在5.7中默认启用,因为mysql2无法编译低于版本0.4.10
到MySQL => 5.7
对我有用的另一种选择是安装 MariaDB,特别是版本 10.0.x
$ brew install [email protected]
$ brew link [email protected] --force
要自动启动 MariaDB Server,请使用 Homebrew 的服务功能,该功能与 macOS launchctl 集成:
brew services start [email protected]
现在,mysql2 的安装将会顺利进行。
$ gem install mysql2 -v '0.4.6'
Building native extensions. This could take a while...
Successfully installed mysql2-0.4.6
我认为你可以删除 Gemfile.lock 中的所有内容。再次尝试
bundle install
后,您的项目将正常运行。
我通过从 dmg 包安装 MySQL 使其工作 https://dev.mysql.com/downloads/mysql/5.7.html#downloads
我刚刚成功使用 Ruby
mysql2-0.5.6
在 Windows 10 上安装 3.2.3
,如下:
gem install mysql2 --platform=ruby -- --with-mysql-lib="C:\MySQL\MySQL Connector C++ 8.3\lib64"