仅当用户上传新图片 Laravel 时才更新图片
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Only update image if user uploaded a new one, Laravel
提问by himmip
I have an edit form which has an image field where a user can upload a new image if he wants to.
我有一个编辑表单，其中有一个图像字段，用户可以在其中上传新图像。
But if the user does not upload a new photo I don't want to validate the image field and just use the photo that's already in the database. And not update the image field at all.
但是如果用户不上传新照片，我不想验证图像字段而只使用数据库中已有的照片。并且根本不更新图像字段。
Here is my edit function:
这是我的编辑功能：
public function postEdit($id) {
$product = Product::find($id);
// This should be in product model, just testing here
$edit_rules = array(
'category_id' => 'required|integer',
'title' => 'required|min:2',
'description' => 'required|min:10',
'price' => 'required|numeric',
'stock' => 'integer'
);
// Add image rule only if user uploaded new image
if (Input::has('image')) {
$edit_rules['image'] = 'required|image|mimes:jpeg,jpg,bmp,png,gif';
}
$v = Validator::make(Input::all(), $edit_rules);
if ($product) {
if ($v->fails()) {
return Redirect::back()->withErrors($v);
}
// Upload the new image
if (Input::has('image')) {
// Delete old image
File::delete('public/'.$product->image);
// Image edit
$image = Input::file('image');
$filename = date('Y-m-d-H:i:s')."-".$image->getClientOriginalName();
Image::make($image->getRealPath())->resize(600, 600)->save('public/img/products/'.$filename);
$product->image = 'img/products/'.$filename;
$product->save();
}
// Except image because already called save if image was present, above
$product->update(Input::except('image'));
return Redirect::to('admin/products')->with('message', 'Product updated.');
}
return Redirect::to('admin/products');
}
Using this I can update all the values except the image.
使用它，我可以更新除图像之外的所有值。
If I don't upload a new photo it saves all other updated values.
如果我不上传新照片，它会保存所有其他更新的值。
If I do upload a new photo it just ignores it and saves all other updated values, doesn't upload the new photo.
如果我确实上传了一张新照片，它只会忽略它并保存所有其他更新的值，而不上传新照片。
回答by doncadavona
Check if the request has the file:
检查请求是否有文件：
public function update(Request $request)
{
// Update the model.
if($request->hasFile('photo')) {
// Process the new image.
}
// ...
}
回答by Omer YILMAZ
You need to use multipartfor form enctype
您需要使用multipartfor form enctype
回答by xRooT
You can use another function to delete the images from the folder. like here
您可以使用其他功能从文件夹中删除图像。像这儿
private function unlinkPostImages($images)
{
if(!empty($images)){
foreach ($images as $img){
$old_image = public_path('storage/' . $img->image);
if (file_exists($old_image)) {
@unlink($old_image);
}
}
}
}
Then call this function above image delete function. like this...
然后在图像删除函数上方调用此函数。像这样...
$this->unlinkPostImages($getId->images); // this will delete image from folder
$getId->images()->delete(); // --> this delete from database table $post->id
my update function
我的更新功能
public function update(UpdatePostRequest $request, Post $post)
{
//
$data = $request->only(['title', 'description', 'contents', 'price']);
// ???? ??????? //
if ($request->hasFile('image')) {
Storage::disk('public')->delete($post->image);
$imagePath = $request->image;
$filename = Str::random(10).'-'.time().'-'.$imagePath->getClientOriginalName();
$image_resize = Image::make($imagePath->getRealPath());
$image_resize->fit(120);
$image_resize->orientate();
$image_resize->save(public_path('storage/images/' .$filename), 100);
$sImg = 'images/'. $filename;
$data['image'] = $sImg;
}
// -------- //
if ($request->hasFile('images'))
{
$getId = Post::find($post->id);
$this->unlinkPostImages($getId->images);
$getId->images()->delete();
$uploadPicture = array();
foreach ($request->file('images') as $photo) {
$file = $photo;
$filename = $file->getClientOriginalName();
$picture = date('His').'-'.$filename;
$file->move(public_path('storage/images/'), $picture);
array_push($uploadPicture, new PostImages(array('image' => 'images/'. $picture)));
}
$post->images()->saveMany($uploadPicture);
}
if ($request->input('contents')) {
$data['content'] = $request->contents;
}
//dd($data);
$post->update($data);
session()->flash('SUCCESS', '?? ????? ??????? ?????.');
return redirect()->route('post.show', [$post->id, Post::slug($post->title)]);
}
回答by prathu
public function update() {
$id=Input::get('id');
$rules= array('name'=>'required|regex:/(^[A-Za-z]+$)+/',
'detail'=>'required|regex:/(^[A-Za-z]+$)+/',
'images' => 'required|image');
$dat = Input::all();
$validation = Validator::make($dat,$rules);
if ($validation->passes()){
$file =Input::file('images');
$destinationPath = 'image/pack';
$image = value(function() use ($file){
$filename = date('Y-m-d-H:i:s') . '.' . $file->getClientOriginalExtension();
return strtolower($filename);
});
$newupload =Input::file('images')->move($destinationPath, $image);
DB::table('pkgdetail')
->where('id', $id)
->limit(1)
->update(array('name' => Input::get('name'), 'detail' => Input::get('detail'), 'image' => $newupload));
$data=PackModel::get_all();
return View::make('pkg_dis')->with('data',$data)
->withErrors($validation)
->with('message', 'Successfully updated.');
}
}
回答by ashish bansal
use Illuminate\Support\Facades\Input;
使用 Illuminate\Support\Facades\Input;
public function update(Request $request, $id)
{
if ($tag = Tag::find($id))
{
$this->validate($request, [
'tag_name' => 'required|min:3|max:100|regex: /^[a-zA-Z0-9\s][a-zA-Z0-9\s?]+$/u|unique:tags,tag_name,'.$id.',id',
]);
$tag->tag_name=$request->input('tag_name');
// get the image tag_img_Val
if($request->hasFile('tag_image'))
{
$this->validate($request, [
'tag_image' => 'image|mimes:jpeg,png,jpg,gif,svg|max:1000',
]);
$img = $request->file('tag_image');
$old_image = 'uploads/' . $tag->tag_image;//get old image from storage
if ($img != '')
{
$image = rand() . '_' . ($img->getClientOriginalName());
$path = 'uploads/';
//Storing image
if ($img->move(public_path($path), $image))
{
$tag->tag_image = $image;
if ($tag->update())
{
if (is_file($old_image)) {
unlink($old_image); // delete the old image
}
return response()->json(['message' => 'Tag has been updated successfully.'],200);
}
else
{
unlink($image); // delete the uploaded image if not updated in database
return response()->json(['message' => "Sorry, Tag not updated"],500);
}
}
else
{
return response()->json(['message' => "Sorry, Image not moved"],500);
}
}
else
{
return response()->json(['message' => "Sorry, Image not uploaded"],500);
}
}
else
{
if($tag->update(Input::except('tag_image')))
{
return response()->json(['message' => 'Tag has been updated successfully.'],200);
}
else
{
return response()->json(['message' => "Sorry, Tag not updated"],500);
}
}
}
else
{
return response()->json(['message' => 'Tag not found'], 404);
}
}
回答by pankaj
In controller part:
在控制器部分：
$destinationPath = 'uploads';
$extension = Input::file('image')->getClientOriginalExtension();
var_dump($extension);
$fileName = rand(11111,99999).'.'.$extension;
Input::file('image')->move($destinationPath, $fileName);
