小编Kha*_*oui的帖子

有没有人解决这个问题Ruby 2.7.0？

我使用rbenv并安装了 Ruby v2.7.0，然后使用Rails v6.0.2.1.

目前，通过运行其中之一

rails s
rails s -u puma
rails s -u webrick

服务器已启动并且站点已提供服务，但在Console日志中我看到两条警告消息：

local:~/rcode/rb27$ rails s
=> Booting Puma
=> Rails 6.0.2.1 application starting in development 
=> Run `rails server --help` for more startup options
.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/actionpack-6.0.2.1/lib/action_dispatch/middleware/stack.rb:37: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/actionpack-6.0.2.1/lib/action_dispatch/middleware/static.rb:110: warning: The called method `initialize' is defined here
Puma starting in single …

您好我为单个字段表单找到了答案...但是如果我们有一个包含多个字段的表单怎么办？

如果您有1个字段,这可以禁用它,但是当您想要根据许多字段禁用它时它不起作用:

getInitialState() {
    return {email: ''}
  },
  handleChange(e) {
    this.setState({email: e.target.value})
  },
  render() {
    return <div>
      <input name="email" value={this.state.email} onChange={this.handleChange}/>
      <button type="button" disabled={!this.state.email}>Button</button>
    </div>
  }
})