Question

这是我的代码：

$num = 5;
$voucher = new Voucher;

for ( $i = $num; $i > 0; $i-- ) {

    $token = generateRandomString(5, ['number', 'uppercase']);

    $voucher->prefix = $request->prefix;
    $voucher->token = $token;
    $voucher->description = $request->description;
    $voucher->date_time = time();
    $voucher->save();
}

显然我的代码应插入5行。但令人惊讶的是它只插入了一行。怎么了？我该怎么办呢？

Answer 1

您始终使用对象的相同实例。每次使用不同的数据保存同一行时。这是如何修复。

function wavelist()

   wavefiles=dir('*.wav');   % loaded wave files
   myfolder='/home/adspr/Desktop/exps_sree/waves/selectedfiles'; %Output folder to store files

   for i=1: numel(wavefiles)  %for each wave file
      filename=wavefiles(i).name;  
      [~,name,~] = fileparts(filename);  % found the name of file without extension
      a=name(end-2:end); %get the last 3 digits in the file name
      fileID = fopen('nameslist','r');

      while ~feof(fileID)
          b=fgetl(fileID); % get each line in the list file

          if strcmp(a,b) % compare 
              movefile(filename,myfolder); % moved to otput folder

          end

      end
   fclose(fileID); 

   end
end

Answer 2

您应该在for循环中创建一个新凭证。目前，正如您所说，您将同一个对象插入数据库五次

Answer 3

您每次都在使用相同的实例！在每个for循环中创建一个新的，如：

$num = 5;

for ( $i = $num; $i > 0; $i-- ) {

    $voucher = new Voucher;

    $token = generateRandomString(5, ['number', 'uppercase']);

    $voucher->prefix = $request->prefix;
    $voucher->token = $token;
    $voucher->description = $request->description;
    $voucher->date_time = time();
    $voucher->save();
}

Answer 4

这是创建多数组的基本示例，只需插入插入函数即可。

$num = 5;
$dataArray = array();
for ( $i = $num; $i > 0; $i-- ) {

    $token = generateRandomString(5, ['number', 'uppercase']);

    $dataArray[$i]['prefix'] = $request->prefix;
    $dataArray[$i]['token'] = $token;
    $dataArray[$i]['description'] = $request->description;
    $dataArray[$i]['date_time'] = time();

}

Voucher::insert($dataArray);

Answer 5

如果您已有模型实例，则可以使用fill方法使用一组属性填充它：

$num = 5;
$voucher = new Voucher;

for ( $i = $num; $i > 0; $i-- ) {

    $token = generateRandomString(5, ['number', 'uppercase']);

    $payload = [];
    $payload['prefix'] = $request->prefix;
    $payload['token'] = $token;
    $payload['description'] = $request->description;
    $payload['date_time'] = time();

    $voucher->fill($payload);
}

Documentation

如何在Laravel中将多行插入数据库？

5 个答案: