Jquery 如何根据其他输入所做的选择填充输入

这是我的发票单。我想根据“从数据库中选择”选项字段填充标题。如何从客户机数据库获取值以填充发票表单中的标题。谢谢

<form action="{{ route('admin.invoices.store') }}" method="post">  

     {{ csrf_field() }}

     <div class="row">

           <div class="col-md-3">
              <div class="form-group">

                <label for="invoicenumber">Invoice Number</label><br>
                <input class="form-control" type="text" name="invoice_no" id="number">
                <span class="alert-danger" id="number-feedback"></span>


              </div>
              <div class="form-group">
                <label for="client">Client</label><br>
               <select name="client" id="client_id" class="form-control">
                  <option value="select">Select Client</option>
                   @foreach($clients as $client)
                       <option id="option" value="{{ $client-> id|$client->name }}">{{ $client->name }}</option>
                   @endforeach
               </select>


              </div>

              <div class="form-group">
                  <label for="Title">Title</label><br>
                <input class="form-control" type="text" name="title" id="title">
                <span class="alert-danger" id="title-feedback"></span>
              </div>
           </div>

我的ajax请求

$(document).on('change', '#client_id', function(event){

    var id = $("#client_id").find(":selected").text();



$.ajax({
        type: "POST",
        url: '/populate',
        data: {id: id, '_token':$('input[name=_token]').val()},
        success: function( data ) {
           //$('#refresh').load(location.href + ' #refresh');
            console.log(data);
        }
    });

});

A这是我在逻辑上最挣扎的地方

    public function populate(Request $request){

    $client =Client::find($request->id);


    }

这是我希望在选择客户机名称时从客户机表中获取的数据，以填充发票表

 Schema::create('clients', function (Blueprint $table) {
        $table->increments('id');
        $table->string('company');
        $table->string('title');
        $table->string('name');
        $table->string('phone_number');
        $table->string('email');
        $table->string('address');
        $table->string('state');
        $table->string('city');
        $table->string('country');
        $table->string('code');
        $table->string('info');
        $table->string('image');
        $table->timestamps();
    });

请执行以下操作：

<select name="client" id="client_id" class="form-control">
                  <option value="select">Select Client</option>
                   @foreach($clients as $client)
                       <option id="option" value="{{ $client->id}}">{{ $client->name }}</option>//set the value to the client id
                   @endforeach
               </select>

不要忘记在控制器功能中返回客户机，请执行以下操作：

<select name="client" id="client_id" class="form-control">
                  <option value="select">Select Client</option>
                   @foreach($clients as $client)
                       <option id="option" value="{{ $client->id}}">{{ $client->name }}</option>//set the value to the client id
                   @endforeach
               </select>

I finally got it right results:
after getting id:

$client = Client::find($request->id);

    return $client;
I display data in ajax call, where I was struggling so it worked fine

$(document).on('change', '#client_id', function(event){

    var id = $("#client_id").val();



$.ajax({
        type: "POST",
        url: '/populate',
        data: {id: id, '_token':$('input[name=_token]').val()},
        success: function( data ) {

          $("#title").val(data.title);
          $("#address").val([

              data.address,
              data.state,
              data.city,
              data.country,
              data.code


          ]);
          //$('#refresh').load(location.href + ' #refresh');
            console.log(data.title);
        }
    });

});

---

别忘了在控制器函数中返回客户机

我正在从id获取值，我不需要进行更改，当我控制台log$request->all（）返回选中的值时，但我不知道如何填充输入标题，这正是我遇到的困难。谢谢什么输入标题？你想用什么填充它？我已经更新了我的问题。我想根据选择名称填充输入，例如，我选择客户名称，我想从客户数据库获取标题和地址，然后在发票表单中填充输入。谢谢我从id中获取了值，我不需要做那个更改，当我控制台log$request->all（）返回并选择了值时，但是我不知道如何填充输入标题，这正是我在努力的地方。谢谢什么输入标题？你想用什么填充它？我已经更新了我的问题。我想根据选择名称填充输入，例如，我选择客户名称，我想从客户数据库获取标题和地址，然后在发票表单中填充输入。谢谢

I finally got it right results:
after getting id:

$client = Client::find($request->id);

    return $client;
I display data in ajax call, where I was struggling so it worked fine

$(document).on('change', '#client_id', function(event){

    var id = $("#client_id").val();



$.ajax({
        type: "POST",
        url: '/populate',
        data: {id: id, '_token':$('input[name=_token]').val()},
        success: function( data ) {

          $("#title").val(data.title);
          $("#address").val([

              data.address,
              data.state,
              data.city,
              data.country,
              data.code


          ]);
          //$('#refresh').load(location.href + ' #refresh');
            console.log(data.title);
        }
    });

});