大家好我是rails的新手，我安装了所有东西ruby rails mysql，一切都做得很好，健康，当我试图创建一个新的应用程序'rails new blog'例如一切都做得很好，但每当我添加'-d mysql'它卡住了，并且知道一切都安装得好了
Aikers-MBP：~Aiker $ brew install mysql 警告：已经安装了mysql-5.7.16 艾克斯-MBP：~Aiker $
这里我试图安装
安装mysql2（0.4.5）时发生错误，Bundler无法继续。
在捆绑之前确保gem install mysql2 -v '0.4.5'成功。
Aikers-MBP：kar Aiker $ rake db create
无法在Gemfile中列出的任何gem源中找到gem'rail（= 4.2.6）'或在此计算机上可用。
运行bundle install以安装缺少的宝石。
Aikers-MBP：kar Aiker $ gem install mysql2 -v'0.4.5'
构建原生扩展。这可能需要一段时间......
错误：安装mysql2时出错：
错误：无法构建gem原生扩展。
答案 0 :(得分：0)
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/Aiker/Desktop/blog/vendor/bundle/gems/mysql2-0.4.5/ext/mysql2
/Users/Aiker/.rbenv/versions/2.3.1/bin/ruby -r ./siteconf20161121-68854-12pc3sf.rb extconf.rb
checking for rb_absint_size()... yes
checking for rb_absint_singlebit_p()... yes
checking for ruby/thread.h... yes
checking for rb_thread_call_without_gvl() in ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_wait_for_single_fd()... yes
checking for rb_hash_dup()... yes
checking for rb_intern3()... yes
checking for rb_big_cmp()... yes
-----
Using mysql_config at /usr/local/bin/mysql_config
-----
checking for mysql.h... yes
checking for SSL_MODE_DISABLED in mysql.h... yes
checking for SSL_MODE_PREFERRED in mysql.h... yes
checking for SSL_MODE_REQUIRED in mysql.h... yes
checking for SSL_MODE_VERIFY_CA in mysql.h... yes
checking for SSL_MODE_VERIFY_IDENTITY in mysql.h... yes
checking for errmsg.h... yes
checking for mysqld_error.h... yes
-----
Don't know how to set rpath on your system, if MySQL libraries are not in path mysql2 may not load
-----
-----
Setting libpath to /usr/local/Cellar/mysql/5.7.16/lib
-----
creating Makefile
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/Users/Aiker/Desktop/blog/vendor/bundle/extensions/x86_64-darwin-16/2.3.0-static/mysql2-0.4.5/mkmf.log
current directory: /Users/Aiker/Desktop/blog/vendor/bundle/gems/mysql2-0.4.5/ext/mysql2
make "DESTDIR=" clean
current directory: /Users/Aiker/Desktop/blog/vendor/bundle/gems/mysql2-0.4.5/ext/mysql2
make "DESTDIR="
compiling client.c
compiling infile.c
compiling mysql2_ext.c
compiling result.c
compiling statement.c
linking shared-object mysql2/mysql2.bundle
ld: library not found for -lssl
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [mysql2.bundle] Error 1
make failed, exit code 2
Gem files will remain installed in /Users/Aiker/Desktop/blog/vendor/bundle/gems/mysql2-0.4.5 for inspection.
Results logged to /Users/Aiker/Desktop/blog/vendor/bundle/extensions/x86_64-darwin-16/2.3.0-static/mysql2-0.4.5/gem_make.out
An error occurred while installing mysql2 (0.4.5), and Bundler cannot continue.
Make sure that `gem install mysql2 -v '0.4.5'` succeeds before bundling.
答案 1 :(得分：0)
您的系统无法找到OpenSSL中存在的var prodAry = [1, 2, 3];
prodAry.forEach(function(product, i) {
// create elements for table
var $tr = $('<tr>');
var $asin = $('<td>');
var $title = $('<td>');
var $price = $('<td>');
var $mpn = $('<td>');
var $newAsin = $asin.text(i);
var $newTitle = $title.text(i);
var $newPrice = $price.text(i);
var $newMpn = $mpn.text(i);
var $newTr = $tr.append($newAsin, $newTitle, $newPrice, $newMpn);
$('#products-table > tbody:last-child').append($newTr);
});
库。要解决此问题，您需要运行：
lssl在此之后尝试安装brew install openssl
gem。如果仍然失败，则可能需要通过运行以下命令重新安装Xcode命令行工具：
mysql2希望这能解决您的安装问题。 ：）