我创建了新的rails应用程序并尝试运行bundle install它显示此错误,
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /var/lib/gems/2.3.0/gems/json-1.8.6/ext/json/ext/generator/usr/bin/ruby2.3 -r ./siteconf20170704-11395-12tpg5u.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h
extconf failed, exit code 1
Gem files will remain installed in /var/lib/gems/2.3.0/gems/json-1.8.6 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/json-1.8.6/gem_make.out
An error occurred while installing json (1.8.6), and Bundler cannot continue.
Make sure that `gem install json -v '1.8.6'` succeeds before bundling
请寄给我一些建议,在此先感谢.
我需要使用我的自定义模块访问magento2管理登录页面。如何将login.phtml覆盖到我的自定义模板文件（如custom-login.phtml文件）中。
请检查下面的编码并给我一些解决方案，
检查布局文件view/adminhtml/layout/adminhtml_auth_login.xml
<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<body>
<referenceBlock name="admin.login">
<arguments>
<argument name="template" xsi:type="string">Namespace_Modulename::admin/login.phtml</argument>
</arguments>
</referenceBlock>
在我的自定义模块中添加该 xml 文件并将 login.phtml 放入我的自定义模块中。文件路径为view/adminhtml/templates/admin/login.phtml。
提前致谢