连接 Ruby 和 MySQL
Connect Ruby and MySQL
正在尝试连接 ruby 和 mysql。当运行访问数据库的基本脚本出现错误时：
Unable to load driver 'Mysql' (underlying error: uninitialized constant DBI::DBD::Mysql) (DBI::InterfaceError)
谷歌搜索并找到解决方案：
- gem 安装 mysql
- gem 安装 dbd-mysql
第一个，给出错误：
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... yes
checking for rb_thread_start_timer()... no
checking for mysql.h... yes
creating Makefile
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
make "DESTDIR=" clean
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
make "DESTDIR="
compiling mysql.c
mysql.c:79:2: error: unknown type name ‘my_bool’
79 | my_bool *is_null;
| ^~~~~~~
mysql.c: In function ‘options’:
mysql.c:361:5: error: unknown type name ‘my_bool’; did you mean ‘bool’?
361 | my_bool b;
| ^~~~~~~
| bool
mysql.c:391:10: error: ‘MYSQL_SET_CLIENT_IP’ undeclared (first use in this function); did you mean ‘MYSQL_SET_CHARSET_DIR’?
391 | case MYSQL_SET_CLIENT_IP:
| ^~~~~~~~~~~~~~~~~~~
| MYSQL_SET_CHARSET_DIR
mysql.c:391:10: note: each undeclared identifier is reported only once for each function it appears in
mysql.c:398:10: error: ‘MYSQL_SECURE_AUTH’ undeclared (first use in this function); did you mean ‘MYSQL_DEFAULT_AUTH’?
398 | case MYSQL_SECURE_AUTH:
| ^~~~~~~~~~~~~~~~~
| MYSQL_DEFAULT_AUTH
mysql.c: In function ‘stmt_init’:
mysql.c:878:5: error: ‘my_bool’ undeclared (first use in this function)
878 | my_bool true = 1;
| ^~~~~~~
mysql.c:878:12: error: expected ‘;’ before numeric constant
878 | my_bool true = 1;
| ^
| ;
mysql.c:883:61: error: lvalue required as unary ‘&’ operand
883 | if (mysql_stmt_attr_set(s, STMT_ATTR_UPDATE_MAX_LENGTH, &true))
| ^
mysql.c: In function ‘stmt_bind_result’:
mysql.c:1320:74: error: ‘rb_cFixnum’ undeclared (first use in this function)
1320 | else if (argv[i] == rb_cNumeric || argv[i] == rb_cInteger || argv[i] == rb_cFixnum)
| ^~~~~~~~~~
mysql.c: In function ‘stmt_prepare’:
mysql.c:1681:32: warning: assignment to ‘_Bool *’ from incompatible pointer type ‘int *’ [-Wincompatible-pointer-types]
1681 | s->result.bind[i].is_null = &(s->result.is_null[i]);
| ^
In file included from /home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby.h:33,
from mysql.c:5:
mysql.c: In function ‘Init_mysql_api’:
mysql.c:2049:52: error: ‘MYSQL_SECURE_AUTH’ undeclared (first use in this function); did you mean ‘MYSQL_DEFAULT_AUTH’?
2049 | rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
| ^~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2049:44: note: in expansion of macro ‘INT2NUM’
2049 | rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
| ^~~~~~~
mysql.c:2050:61: error: ‘MYSQL_OPT_GUESS_CONNECTION’ undeclared (first use in this function); did you mean ‘MYSQL_OPT_RECONNECT’?
2050 | rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2050:53: note: in expansion of macro ‘INT2NUM’
2050 | rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
| ^~~~~~~
mysql.c:2051:68: error: ‘MYSQL_OPT_USE_EMBEDDED_CONNECTION’ undeclared (first use in this function)
2051 | rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2051:60: note: in expansion of macro ‘INT2NUM’
2051 | rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
| ^~~~~~~
mysql.c:2052:66: error: ‘MYSQL_OPT_USE_REMOTE_CONNECTION’ undeclared (first use in this function)
2052 | rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2052:58: note: in expansion of macro ‘INT2NUM’
2052 | rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
| ^~~~~~~
mysql.c:2053:54: error: ‘MYSQL_SET_CLIENT_IP’ undeclared (first use in this function); did you mean ‘MYSQL_SET_CHARSET_DIR’?
2053 | rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
| ^~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2053:46: note: in expansion of macro ‘INT2NUM’
2053 | rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
| ^~~~~~~
error_const.h:2661:27: error: ‘ER_XPLUGIN_IP’ undeclared (first use in this function); did you mean ‘ER_PLUGIN_OOM’?
2661 | rb_define_mysql_const(ER_XPLUGIN_IP);
| ^~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2286:62: note: in expansion of macro ‘INT2NUM’
2286 | #define rb_define_mysql_const(s) rb_define_const(eMysql, #s, INT2NUM(s))
| ^~~~~~~
error_const.h:2661:5: note: in expansion of macro ‘rb_define_mysql_const’
2661 | rb_define_mysql_const(ER_XPLUGIN_IP);
| ^~~~~~~~~~~~~~~~~~~~~
mysql.c: At top level:
cc1: note: unrecognized command-line option ‘-Wno-self-assign’ may have been intended to silence earlier diagnostics
cc1: note: unrecognized command-line option ‘-Wno-parentheses-equality’ may have been intended to silence earlier diagnostics
cc1: note: unrecognized command-line option ‘-Wno-constant-logical-operand’ may have been intended to silence earlier diagnostics
make: *** [Makefile:245: mysql.o] Error 1
make failed, exit code 2
Gem files will remain installed in /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1 for inspection.
Results logged to /home/wheatman/.rvm/gems/ruby-2.7.2/extensions/x86_64-linux/2.7.0/mysql-2.9.1/gem_make.out
而第二个给出另一个错误：
Building native extensions. This could take a while...
ERROR: Error installing dbd-mysql:
ERROR: Failed to build gem native extension.
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
/home/wheatman/.rvm/rubies/ruby-2.7.2/bin/ruby -I /home/wheatman/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0 -r ./siteconf20201219-250830-klyeov.rb extconf.rb
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... yes
checking for rb_thread_start_timer()... no
checking for mysql.h... yes
creating Makefile
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
make "DESTDIR=" clean
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
make "DESTDIR="
compiling mysql.c
mysql.c:79:2: error: unknown type name ‘my_bool’
79 | my_bool *is_null;
| ^~~~~~~
mysql.c: In function ‘options’:
mysql.c:361:5: error: unknown type name ‘my_bool’; did you mean ‘bool’?
361 | my_bool b;
| ^~~~~~~
| bool
mysql.c:391:10: error: ‘MYSQL_SET_CLIENT_IP’ undeclared (first use in this function); did you mean ‘MYSQL_SET_CHARSET_DIR’?
391 | case MYSQL_SET_CLIENT_IP:
| ^~~~~~~~~~~~~~~~~~~
| MYSQL_SET_CHARSET_DIR
mysql.c:391:10: note: each undeclared identifier is reported only once for each function it appears in
mysql.c:398:10: error: ‘MYSQL_SECURE_AUTH’ undeclared (first use in this function); did you mean ‘MYSQL_DEFAULT_AUTH’?
398 | case MYSQL_SECURE_AUTH:
| ^~~~~~~~~~~~~~~~~
| MYSQL_DEFAULT_AUTH
mysql.c: In function ‘stmt_init’:
mysql.c:878:5: error: ‘my_bool’ undeclared (first use in this function)
878 | my_bool true = 1;
| ^~~~~~~
mysql.c:878:12: error: expected ‘;’ before numeric constant
878 | my_bool true = 1;
| ^
| ;
mysql.c:883:61: error: lvalue required as unary ‘&’ operand
883 | if (mysql_stmt_attr_set(s, STMT_ATTR_UPDATE_MAX_LENGTH, &true))
| ^
mysql.c: In function ‘stmt_bind_result’:
mysql.c:1320:74: error: ‘rb_cFixnum’ undeclared (first use in this function)
1320 | else if (argv[i] == rb_cNumeric || argv[i] == rb_cInteger || argv[i] == rb_cFixnum)
| ^~~~~~~~~~
mysql.c: In function ‘stmt_prepare’:
mysql.c:1681:32: warning: assignment to ‘_Bool *’ from incompatible pointer type ‘int *’ [-Wincompatible-pointer-types]
1681 | s->result.bind[i].is_null = &(s->result.is_null[i]);
| ^
In file included from /home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby.h:33,
from mysql.c:5:
mysql.c: In function ‘Init_mysql_api’:
mysql.c:2049:52: error: ‘MYSQL_SECURE_AUTH’ undeclared (first use in this function); did you mean ‘MYSQL_DEFAULT_AUTH’?
2049 | rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
| ^~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2049:44: note: in expansion of macro ‘INT2NUM’
2049 | rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
| ^~~~~~~
mysql.c:2050:61: error: ‘MYSQL_OPT_GUESS_CONNECTION’ undeclared (first use in this function); did you mean ‘MYSQL_OPT_RECONNECT’?
2050 | rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2050:53: note: in expansion of macro ‘INT2NUM’
2050 | rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
| ^~~~~~~
mysql.c:2051:68: error: ‘MYSQL_OPT_USE_EMBEDDED_CONNECTION’ undeclared (first use in this function)
2051 | rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2051:60: note: in expansion of macro ‘INT2NUM’
2051 | rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
| ^~~~~~~
mysql.c:2052:66: error: ‘MYSQL_OPT_USE_REMOTE_CONNECTION’ undeclared (first use in this function)
2052 | rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2052:58: note: in expansion of macro ‘INT2NUM’
2052 | rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
| ^~~~~~~
mysql.c:2053:54: error: ‘MYSQL_SET_CLIENT_IP’ undeclared (first use in this function); did you mean ‘MYSQL_SET_CHARSET_DIR’?
2053 | rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
| ^~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2053:46: note: in expansion of macro ‘INT2NUM’
2053 | rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
| ^~~~~~~
error_const.h:2661:27: error: ‘ER_XPLUGIN_IP’ undeclared (first use in this function); did you mean ‘ER_PLUGIN_OOM’?
2661 | rb_define_mysql_const(ER_XPLUGIN_IP);
| ^~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2286:62: note: in expansion of macro ‘INT2NUM’
2286 | #define rb_define_mysql_const(s) rb_define_const(eMysql, #s, INT2NUM(s))
| ^~~~~~~
error_const.h:2661:5: note: in expansion of macro ‘rb_define_mysql_const’
2661 | rb_define_mysql_const(ER_XPLUGIN_IP);
| ^~~~~~~~~~~~~~~~~~~~~
mysql.c: At top level:
cc1: note: unrecognized command-line option ‘-Wno-self-assign’ may have been intended to silence earlier diagnostics
cc1: note: unrecognized command-line option ‘-Wno-parentheses-equality’ may have been intended to silence earlier diagnostics
cc1: note: unrecognized command-line option ‘-Wno-constant-logical-operand’ may have been intended to silence earlier diagnostics
make: *** [Makefile:245: mysql.o] Error 1
make failed, exit code 2
Gem files will remain installed in /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1 for inspection.
Results logged to /home/wheatman/.rvm/gems/ruby-2.7.2/extensions/x86_64-linux/2.7.0/mysql-2.9.1/gem_make.out
我正在使用 Ubuntu 20.10、ruby 2.7.2 和 mysql 8.0.22，据我了解版本中的问题。有人遇到过这样的问题吗？是版本问题吗？是否有机会将 ruby 和 mysql 与我的版本连接起来，或者我需要回到旧版本？
您使用的是非常过时和废弃的工具。 mysql gem 自 2013 年以来就没有发布过新版本，而 dbd-mysql 自 2010 年以来就没有更新过。它们能否与现代版本的 Ruby 和 MySQL.
您想要的是积极维护的 mysql2 gem。
# https://bundler.io/guides/bundler_in_a_single_file_ruby_script.html
require 'bundler/inline'
gemfile do
source 'https://rubygems.org'
gem 'mysql2', '~> 0.5.2'
end
client = Mysql2::Client.new(host: "localhost", username: "root")
results = client.query("SELECT * FROM users")
results.each do |row|
# do something with row, it's ready to rock
end
正在尝试连接 ruby 和 mysql。当运行访问数据库的基本脚本出现错误时：
Unable to load driver 'Mysql' (underlying error: uninitialized constant DBI::DBD::Mysql) (DBI::InterfaceError)
谷歌搜索并找到解决方案：
- gem 安装 mysql
- gem 安装 dbd-mysql
第一个，给出错误：
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... yes
checking for rb_thread_start_timer()... no
checking for mysql.h... yes
creating Makefile
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
make "DESTDIR=" clean
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
make "DESTDIR="
compiling mysql.c
mysql.c:79:2: error: unknown type name ‘my_bool’
79 | my_bool *is_null;
| ^~~~~~~
mysql.c: In function ‘options’:
mysql.c:361:5: error: unknown type name ‘my_bool’; did you mean ‘bool’?
361 | my_bool b;
| ^~~~~~~
| bool
mysql.c:391:10: error: ‘MYSQL_SET_CLIENT_IP’ undeclared (first use in this function); did you mean ‘MYSQL_SET_CHARSET_DIR’?
391 | case MYSQL_SET_CLIENT_IP:
| ^~~~~~~~~~~~~~~~~~~
| MYSQL_SET_CHARSET_DIR
mysql.c:391:10: note: each undeclared identifier is reported only once for each function it appears in
mysql.c:398:10: error: ‘MYSQL_SECURE_AUTH’ undeclared (first use in this function); did you mean ‘MYSQL_DEFAULT_AUTH’?
398 | case MYSQL_SECURE_AUTH:
| ^~~~~~~~~~~~~~~~~
| MYSQL_DEFAULT_AUTH
mysql.c: In function ‘stmt_init’:
mysql.c:878:5: error: ‘my_bool’ undeclared (first use in this function)
878 | my_bool true = 1;
| ^~~~~~~
mysql.c:878:12: error: expected ‘;’ before numeric constant
878 | my_bool true = 1;
| ^
| ;
mysql.c:883:61: error: lvalue required as unary ‘&’ operand
883 | if (mysql_stmt_attr_set(s, STMT_ATTR_UPDATE_MAX_LENGTH, &true))
| ^
mysql.c: In function ‘stmt_bind_result’:
mysql.c:1320:74: error: ‘rb_cFixnum’ undeclared (first use in this function)
1320 | else if (argv[i] == rb_cNumeric || argv[i] == rb_cInteger || argv[i] == rb_cFixnum)
| ^~~~~~~~~~
mysql.c: In function ‘stmt_prepare’:
mysql.c:1681:32: warning: assignment to ‘_Bool *’ from incompatible pointer type ‘int *’ [-Wincompatible-pointer-types]
1681 | s->result.bind[i].is_null = &(s->result.is_null[i]);
| ^
In file included from /home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby.h:33,
from mysql.c:5:
mysql.c: In function ‘Init_mysql_api’:
mysql.c:2049:52: error: ‘MYSQL_SECURE_AUTH’ undeclared (first use in this function); did you mean ‘MYSQL_DEFAULT_AUTH’?
2049 | rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
| ^~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2049:44: note: in expansion of macro ‘INT2NUM’
2049 | rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
| ^~~~~~~
mysql.c:2050:61: error: ‘MYSQL_OPT_GUESS_CONNECTION’ undeclared (first use in this function); did you mean ‘MYSQL_OPT_RECONNECT’?
2050 | rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2050:53: note: in expansion of macro ‘INT2NUM’
2050 | rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
| ^~~~~~~
mysql.c:2051:68: error: ‘MYSQL_OPT_USE_EMBEDDED_CONNECTION’ undeclared (first use in this function)
2051 | rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2051:60: note: in expansion of macro ‘INT2NUM’
2051 | rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
| ^~~~~~~
mysql.c:2052:66: error: ‘MYSQL_OPT_USE_REMOTE_CONNECTION’ undeclared (first use in this function)
2052 | rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2052:58: note: in expansion of macro ‘INT2NUM’
2052 | rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
| ^~~~~~~
mysql.c:2053:54: error: ‘MYSQL_SET_CLIENT_IP’ undeclared (first use in this function); did you mean ‘MYSQL_SET_CHARSET_DIR’?
2053 | rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
| ^~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2053:46: note: in expansion of macro ‘INT2NUM’
2053 | rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
| ^~~~~~~
error_const.h:2661:27: error: ‘ER_XPLUGIN_IP’ undeclared (first use in this function); did you mean ‘ER_PLUGIN_OOM’?
2661 | rb_define_mysql_const(ER_XPLUGIN_IP);
| ^~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2286:62: note: in expansion of macro ‘INT2NUM’
2286 | #define rb_define_mysql_const(s) rb_define_const(eMysql, #s, INT2NUM(s))
| ^~~~~~~
error_const.h:2661:5: note: in expansion of macro ‘rb_define_mysql_const’
2661 | rb_define_mysql_const(ER_XPLUGIN_IP);
| ^~~~~~~~~~~~~~~~~~~~~
mysql.c: At top level:
cc1: note: unrecognized command-line option ‘-Wno-self-assign’ may have been intended to silence earlier diagnostics
cc1: note: unrecognized command-line option ‘-Wno-parentheses-equality’ may have been intended to silence earlier diagnostics
cc1: note: unrecognized command-line option ‘-Wno-constant-logical-operand’ may have been intended to silence earlier diagnostics
make: *** [Makefile:245: mysql.o] Error 1
make failed, exit code 2
Gem files will remain installed in /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1 for inspection.
Results logged to /home/wheatman/.rvm/gems/ruby-2.7.2/extensions/x86_64-linux/2.7.0/mysql-2.9.1/gem_make.out
而第二个给出另一个错误：
Building native extensions. This could take a while...
ERROR: Error installing dbd-mysql:
ERROR: Failed to build gem native extension.
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
/home/wheatman/.rvm/rubies/ruby-2.7.2/bin/ruby -I /home/wheatman/.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0 -r ./siteconf20201219-250830-klyeov.rb extconf.rb
checking for mysql_ssl_set()... yes
checking for rb_str_set_len()... yes
checking for rb_thread_start_timer()... no
checking for mysql.h... yes
creating Makefile
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
make "DESTDIR=" clean
current directory: /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1/ext/mysql_api
make "DESTDIR="
compiling mysql.c
mysql.c:79:2: error: unknown type name ‘my_bool’
79 | my_bool *is_null;
| ^~~~~~~
mysql.c: In function ‘options’:
mysql.c:361:5: error: unknown type name ‘my_bool’; did you mean ‘bool’?
361 | my_bool b;
| ^~~~~~~
| bool
mysql.c:391:10: error: ‘MYSQL_SET_CLIENT_IP’ undeclared (first use in this function); did you mean ‘MYSQL_SET_CHARSET_DIR’?
391 | case MYSQL_SET_CLIENT_IP:
| ^~~~~~~~~~~~~~~~~~~
| MYSQL_SET_CHARSET_DIR
mysql.c:391:10: note: each undeclared identifier is reported only once for each function it appears in
mysql.c:398:10: error: ‘MYSQL_SECURE_AUTH’ undeclared (first use in this function); did you mean ‘MYSQL_DEFAULT_AUTH’?
398 | case MYSQL_SECURE_AUTH:
| ^~~~~~~~~~~~~~~~~
| MYSQL_DEFAULT_AUTH
mysql.c: In function ‘stmt_init’:
mysql.c:878:5: error: ‘my_bool’ undeclared (first use in this function)
878 | my_bool true = 1;
| ^~~~~~~
mysql.c:878:12: error: expected ‘;’ before numeric constant
878 | my_bool true = 1;
| ^
| ;
mysql.c:883:61: error: lvalue required as unary ‘&’ operand
883 | if (mysql_stmt_attr_set(s, STMT_ATTR_UPDATE_MAX_LENGTH, &true))
| ^
mysql.c: In function ‘stmt_bind_result’:
mysql.c:1320:74: error: ‘rb_cFixnum’ undeclared (first use in this function)
1320 | else if (argv[i] == rb_cNumeric || argv[i] == rb_cInteger || argv[i] == rb_cFixnum)
| ^~~~~~~~~~
mysql.c: In function ‘stmt_prepare’:
mysql.c:1681:32: warning: assignment to ‘_Bool *’ from incompatible pointer type ‘int *’ [-Wincompatible-pointer-types]
1681 | s->result.bind[i].is_null = &(s->result.is_null[i]);
| ^
In file included from /home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby.h:33,
from mysql.c:5:
mysql.c: In function ‘Init_mysql_api’:
mysql.c:2049:52: error: ‘MYSQL_SECURE_AUTH’ undeclared (first use in this function); did you mean ‘MYSQL_DEFAULT_AUTH’?
2049 | rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
| ^~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2049:44: note: in expansion of macro ‘INT2NUM’
2049 | rb_define_const(cMysql, "SECURE_AUTH", INT2NUM(MYSQL_SECURE_AUTH));
| ^~~~~~~
mysql.c:2050:61: error: ‘MYSQL_OPT_GUESS_CONNECTION’ undeclared (first use in this function); did you mean ‘MYSQL_OPT_RECONNECT’?
2050 | rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2050:53: note: in expansion of macro ‘INT2NUM’
2050 | rb_define_const(cMysql, "OPT_GUESS_CONNECTION", INT2NUM(MYSQL_OPT_GUESS_CONNECTION));
| ^~~~~~~
mysql.c:2051:68: error: ‘MYSQL_OPT_USE_EMBEDDED_CONNECTION’ undeclared (first use in this function)
2051 | rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2051:60: note: in expansion of macro ‘INT2NUM’
2051 | rb_define_const(cMysql, "OPT_USE_EMBEDDED_CONNECTION", INT2NUM(MYSQL_OPT_USE_EMBEDDED_CONNECTION));
| ^~~~~~~
mysql.c:2052:66: error: ‘MYSQL_OPT_USE_REMOTE_CONNECTION’ undeclared (first use in this function)
2052 | rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2052:58: note: in expansion of macro ‘INT2NUM’
2052 | rb_define_const(cMysql, "OPT_USE_REMOTE_CONNECTION", INT2NUM(MYSQL_OPT_USE_REMOTE_CONNECTION));
| ^~~~~~~
mysql.c:2053:54: error: ‘MYSQL_SET_CLIENT_IP’ undeclared (first use in this function); did you mean ‘MYSQL_SET_CHARSET_DIR’?
2053 | rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
| ^~~~~~~~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2053:46: note: in expansion of macro ‘INT2NUM’
2053 | rb_define_const(cMysql, "SET_CLIENT_IP", INT2NUM(MYSQL_SET_CLIENT_IP));
| ^~~~~~~
error_const.h:2661:27: error: ‘ER_XPLUGIN_IP’ undeclared (first use in this function); did you mean ‘ER_PLUGIN_OOM’?
2661 | rb_define_mysql_const(ER_XPLUGIN_IP);
| ^~~~~~~~~~~~~
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:262:33: note: in definition of macro ‘RB_INT2FIX’
262 | #define RB_INT2FIX(i) (((VALUE)(i))<<1 | RUBY_FIXNUM_FLAG)
| ^
/home/wheatman/.rvm/rubies/ruby-2.7.2/include/ruby-2.7.0/ruby/ruby.h:1609:20: note: in expansion of macro ‘RB_INT2NUM’
1609 | #define INT2NUM(x) RB_INT2NUM(x)
| ^~~~~~~~~~
mysql.c:2286:62: note: in expansion of macro ‘INT2NUM’
2286 | #define rb_define_mysql_const(s) rb_define_const(eMysql, #s, INT2NUM(s))
| ^~~~~~~
error_const.h:2661:5: note: in expansion of macro ‘rb_define_mysql_const’
2661 | rb_define_mysql_const(ER_XPLUGIN_IP);
| ^~~~~~~~~~~~~~~~~~~~~
mysql.c: At top level:
cc1: note: unrecognized command-line option ‘-Wno-self-assign’ may have been intended to silence earlier diagnostics
cc1: note: unrecognized command-line option ‘-Wno-parentheses-equality’ may have been intended to silence earlier diagnostics
cc1: note: unrecognized command-line option ‘-Wno-constant-logical-operand’ may have been intended to silence earlier diagnostics
make: *** [Makefile:245: mysql.o] Error 1
make failed, exit code 2
Gem files will remain installed in /home/wheatman/.rvm/gems/ruby-2.7.2/gems/mysql-2.9.1 for inspection.
Results logged to /home/wheatman/.rvm/gems/ruby-2.7.2/extensions/x86_64-linux/2.7.0/mysql-2.9.1/gem_make.out
我正在使用 Ubuntu 20.10、ruby 2.7.2 和 mysql 8.0.22，据我了解版本中的问题。有人遇到过这样的问题吗？是版本问题吗？是否有机会将 ruby 和 mysql 与我的版本连接起来，或者我需要回到旧版本？
您使用的是非常过时和废弃的工具。 mysql gem 自 2013 年以来就没有发布过新版本，而 dbd-mysql 自 2010 年以来就没有更新过。它们能否与现代版本的 Ruby 和 MySQL.
您想要的是积极维护的 mysql2 gem。
# https://bundler.io/guides/bundler_in_a_single_file_ruby_script.html
require 'bundler/inline'
gemfile do
source 'https://rubygems.org'
gem 'mysql2', '~> 0.5.2'
end
client = Mysql2::Client.new(host: "localhost", username: "root")
results = client.query("SELECT * FROM users")
results.each do |row|
# do something with row, it's ready to rock
end