使用 Kartik FileInput 小部件保存多个图像文件
Yii2 Kartik FileInput Multiple Images Before Upload Temp 和 Uploaded Images 显示和删除和更新新图像。
我想在我的 Yii2 应用程序中使用 Kartik 输入文件使用可下载的拖放文件。他们说这种输入拖放文件模型需要 AJAX 来发送数据。我只是按照此处的 Kartik 输入文件和此处的 AJAX 的主要代码。我是编程新手，但我仍然不知道如何使用 AJAX。
因此，我尝试在我的 Form.php (path = app /modules/products/views/Form.php) 中组合这两个代码，如下所示：
Table : products_images
id (Primary)
product_id (FK)
image
Table : product
id (Primary)
Name
ect
在这里查看表格...
<?php
use yii\helpers\Html;
use yii\helpers\Url;
use kartik\widgets\FileInput;
?>
<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); ?>
<?php echo '<label class="control-label">Choose an Image file(.png, .jpg)</label>'; ?>
<?php
//For Update Form : Fetch Uploaded Images and create Array to preview
$imagesList = array();
$imagesListId = array();
foreach ($model->productsImages as $img) {
$imagesList[] = Url::base(TRUE) . '/' . $img->image;
$imagesListId[]['key'] = $img->id;
}
?>
<?php
$empty_image = Url::base(TRUE) . "/uploads/image-upload-empty.png";
echo FileInput::widget([
'model' => $model,
'attribute' => 'products_image[]',
'name' => 'products_image[]',
'options' => ['multiple' => true, 'accept' => 'image/*', 'id' => 'products_image_id'],
'pluginOptions' => [
'initialPreview' => $imagesList,
'initialPreviewConfig' => $imagesListId,
'deleteUrl' => Url::to(['products/delete-image']),
'showCaption' => false,
'showRemove' => false,
'showUpload' => false,
'browseClass' => 'btn btn-primary col-lg-6 col-md-8 col-sm-8 col-xs-6',
'browseIcon' => '<i class="glyphicon glyphicon-plus-sign"></i> ',
'browseLabel' => 'Upload Image',
'allowedFileExtensions' => ['jpg', 'png'],
'previewFileType' => ['jpg', 'png'],
'initialPreviewAsData' => true,
'overwriteInitial' => false,
"uploadUrl" => Url::to(['products/upload']),
'uploadExtraData' => ['products_id' => $model->id, 'is_post' => $model->isNewRecord ? 'new' : 'update'],
'msgUploadBegin' => Yii::t('app', 'Please wait, system is uploading the files'),
//'msgUploadThreshold' => Yii::t('app', 'Please wait, system is uploading the files'),
//'msgUploadEnd' => Yii::t('app', 'Done'),
'msgFilesTooMany' => 'Maximum 15 products Images are allowed to be uploaded.',
'dropZoneClickTitle' => '',
"uploadAsync" => true,
"browseOnZoneClick" => true,
"dropZoneTitle" => '<img src=' . $empty_image . ' />',
'fileActionSettings' => [
'showZoom' => true,
'showRemove' => true,
'showUpload' => false,
],
'validateInitialCount' => true,
'maxFileCount' => 15,
'maxFileSize' => 5120, //5mb
'msgPlaceholder' => 'Select attachments',
],
'pluginEvents' => [
'filebatchselected' => 'function(event, files) {
$(this).fileinput("upload");
}',
/* 'uploadExtraData' => 'function() {
var out = {}, key, i = 0;
$(".kv-input:visible").each(function() {
$el = $(this);
key = $el.hasClass("kv-new") ? "new_" + i : "init_" + i;
out[key] = $el.val();
i++;
});
return out;
}', */
'filepredelete' => 'function(event, files) {
//var abort = true;
var index = uploaded_images.indexOf(files);
if (index !== -1) uploaded_images.splice(index, 1);
console.log(uploaded_images);
$("#productsmaster-images_array").val(uploaded_images);
//return abort;
}',
'fileuploaded' => 'function(event, data, previewId, index){
//alert( data.response.initialPreviewConfig[0].key);
uploaded_images.push(data.response.initialPreviewConfig[0].key);
console.log(uploaded_images);
$("#productsmaster-images_array").val(uploaded_images);
}',
/* 'filepreupload' => 'function(event, data, previewId, index){
var form = data.form, files = data.files, extra = data.extra,
response = data.response, reader = data.reader;
console.log(data.jqXHR);
console.log("File pre upload triggered");
}', */
],
]);
?>
<?= $form->field($model, 'images_array')->hiddenInput()->label(false) ?>
<?php echo '<br>' ?>
<?= Html::submitButton('<i class="glyphicon glyphicon-save-file"></i> UPLOAD FILE', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary'], ['students/create']) ?>
<?php ActiveForm::end(); ?>
<?php
$script = <<< JS
// initialize array
var uploaded_images = [];
JS;
$this->registerJs($script);
?>
这里控制器文件：
<?php
/*
* Post products Images Upload Action Via FileInput Yii2 Extention.
*/
public function actionUpload() {
$files = array();
$allwoedFiles = ['jpg', 'png'];
if ($_POST['is_post'] == 'update') {
$products_id = $_POST['products_id'];
if ($_FILES) {
$tmpname = $_FILES['ProductsMaster']['tmp_name']['products_image'][0];
$fname = $_FILES['ProductsMaster']['name']['products_image'][0];
//Get the temp file path
$tmpFilePath = $tmpname;
//Make sure we have a filepath
if ($tmpFilePath != "") {
//save the filename
$shortname = $fname;
$size = $_FILES['ProductsMaster']['size']['products_image'][0];
$ext = substr(strrchr($shortname, '.'), 1);
if (in_array($ext, $allwoedFiles)) {
//save the url and the file
$newFileName = Yii::$app->security->generateRandomString(40) . "." . $ext;
//Upload the file into the temp dir
if (move_uploaded_file($tmpFilePath, 'uploads/products/' . $newFileName)) {
$productsImages = new productsImages();
$productsImages->products_id = $products_id;
$productsImages->image_for = 'products';
$productsImages->image = 'uploads/products/' . $newFileName;
$productsImages->created_at = time();
$productsImages->save();
$files['initialPreview'] = Url::base(TRUE) . '/uploads/products/' . $newFileName;
$files['initialPreviewAsData'] = true;
$files['initialPreviewConfig'][]['key'] = $productsImages->id;
return json_encode($files);
}
}
}
} /* else {
return json_encode(['error' => 'No files found for pload.']);
} */
return json_encode($files);
} else {
if (isset($_POST)) {
if ($_FILES) {
$files = ProductsMaster::SaveTempAttachments($_FILES);
return json_encode($files);
$result = ['files' => $files];
Yii::$app->response->format = trim(Response::FORMAT_JSON);
return $result;
} /* else {
echo json_encode(['error' => 'No files found for pload.']);
} */
}
}
}
/**
* Uploaded Images Delete Action on Update Forms Action
* @return boolean
*/
public function actionDeleteImage() {
$key = $_POST['key'];
if (is_numeric($key)) {
$products_image = ProductsImages::find()->where(['id' => $key])->one();
unlink(Yii::getAlias('@webroot') . '/' . $products_image->image);
$products_image->delete();
return true;
} else {
unlink(Yii::getAlias('@webroot') . '/uploads/products/temp/' . $key);
return true;
}
}
/**
** Create Products
**/
public function actionCreate() {
//Products Images
// temp store image moved and save to database.. with generated forms..
if (count($model->images_array) > 0) {
$images_array = explode(',', $model->images_array);
if (!empty($images_array) && $model->images_array != '') {
foreach ($images_array as $image) {
$file = Yii::$app->basePath . '/uploads/products/temp/' . $image;
$rename_file = Yii::$app->basePath . '/uploads/products/' . $image;
rename($file, $rename_file);
$productsImages = new productsImages();
$productsImages->products_id = $model->id;
$productsImages->image_for = 'products';
$productsImages->image = 'uploads/products/' . $image;
$productsImages->created_at = time();
$productsImages->save();
}
}
}
}
?>
这里是模型场。我在附件模型中添加了加载功能。
<?php
/*
* Save Temp Images
*/
public static function SaveTempAttachments($attachments) {
$files = "";
$allwoedFiles = ['jpg', 'png'];
if ($_FILES) {
$tmpname = $_FILES['ProductsMaster']['tmp_name']['products_image'];
$fname = $_FILES['ProductsMaster']['name']['products_image'];
if (!empty($attachments)) {
if (count($fname) > 0) {
//Loop through each file
for ($i = 0; $i < count($fname); $i++) {
//Get the temp file path
$tmpFilePath = $tmpname[$i];
//Make sure we have a filepath
if ($tmpFilePath != "") {
//save the filename
$shortname = $fname[$i];
$size = $attachments['ProductsMaster']['size']['products_image'][$i];
$ext = substr(strrchr($shortname, '.'), 1);
if (in_array($ext, $allwoedFiles)) {
//save the url and the file
$newFileName = Yii::$app->security->generateRandomString(40) . "." . $ext;
//Upload the file into the temp dir
if (move_uploaded_file($tmpFilePath, 'uploads/products/temp/' . $newFileName)) {
$files['initialPreview'] = Url::base(TRUE) . '/uploads/products/temp/' . $newFileName;
$files['initialPreviewAsData'] = true;
// $files['uploadExtraData'][]['is_post'] = 'new';
$files['initialPreviewConfig'][]['key'] = $newFileName;
}
}
}
}
}
}
}
return $files;
}
?>