Formdata uploads multiple images, why can't it traverse

for(var _img in img_file){           
    formdata.append("file", img_file[_img]);
}
let files = ctx.request.files;
console.log("filesPP+:");console.log(files);
    for(let index in files){
        console.log(index);//file[]
        file = files[index];
        console.log("file---:")
        console.log(file)

console.log (index); / / output file []
and files and files [index] are the same thing
Why?

Node.js
Apr.03,2021

FormData cannot pass the instance's [] or. Attributes can only be obtained through get
such as 

let form = new FormData()
form.append('prop', 1)
console.log(form.prop)//undefined
console.log(form.get('prop'))

if you need to get all the fields, get a pseudo array through api such as keys,values and then manipulate

solved 

function upload(files,title){  
    let imgList=[],file,url;
    
    files = files['file'];//
    
    if(files.length){//
        for(let index in files){
            file = files[index];     

            url=`uploads/${title}-${file.name}`;
            fs.createReadStream(file.path).pipe(fs.createWriteStream(url))
        
            imgList.push([index,url]);
        }
    }else{   
        file = files;        
        url=`uploads/${title}-${file.name}`;
        fs.createReadStream(file.path).pipe(fs.createWriteStream(url))
        imgList.push([0,url]);
    }
     
     return imgList;
   
}
exports.add = async(ctx, next)=>{
    let {title,body,tags,category}=ctx.request.body;
    let files = ctx.request.files;//

    let imgList = upload(files,title);

    let post = new Post({
        title,
        body,
        tags,
        category,
        imgList
    })
    let result= await dbHelper.Save(post);
    ctx.response.body = result;    
}

Previous: Npm run dev did not respond when mpvue was used.

Next: Webpack-dev-server installation error

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
© 2021 CodesHelper
Advertising Contact us About us
Menu