How can I show you the files already stored on server using Dropzone.js
Javascriptdropzone.jsJavascript Problem Overview
I Don't understand that... call its always undefined
Create the mock file:
var mockFile = { name: "Filename", size: 12345 };
Call the default addedfile event handler
myDropzone.options.addedfile.call(myDropzone, mockFile);
And optionally show the thumbnail of the file:
myDropzone.options. thumbnail.call(myDropzone, mockFile, "/image/url");
Javascript Solutions
Solution 1 - Javascript
Finally !!
$(function() {
var mockFile = { name: "banner2.jpg", size: 12345 };
var myDropzone = new Dropzone("#my-awesome-dropzone");
myDropzone.options.addedfile.call(myDropzone, mockFile);
myDropzone.options.thumbnail.call(myDropzone, mockFile, "http://localhost/test/drop/uploads/banner2.jpg");
})
Solution 2 - Javascript
You can also do with the following code:
<script>
Dropzone.options.myAwesomeDropzone = false;
Dropzone.autoDiscover = false;
$("#image").dropzone({
url: "http://someserver.com/upload.php",
paramName: "image", // The name that will be used to transfer the file
maxFilesize: 2, // MB
maxFiles: 5,
parallelUploads: 5,
addRemoveLinks: true,
dictMaxFilesExceeded: "You can only upload upto 5 images",
dictRemoveFile: "Delete",
dictCancelUploadConfirmation: "Are you sure to cancel upload?",
accept: function (file, done) {
console.log(file)
if ((file.type).toLowerCase() != "image/jpg" &&
(file.type).toLowerCase() != "image/gif" &&
(file.type).toLowerCase() != "image/jpeg" &&
(file.type).toLowerCase() != "image/png"
) {
done("Invalid file");
}
else {
done();
}
},
init: function () {
var mockFile = { name: "myimage.jpg", size: 12345, type: 'image/jpeg' };
this.addFile.call(this, mockFile);
this.options.thumbnail.call(this, mockFile, "http://someserver.com/myimage.jpg");
}
});
</script>
EDIT
Since update of Dropzone 4.0 init function can be called as:
init: function () {
var mockFile = { name: "myimage.jpg", size: 12345, type: 'image/jpeg' };
this.options.addedfile.call(this, mockFile);
this.options.thumbnail.call(this, mockFile, "http://someserver.com/myimage.jpg");
mockFile.previewElement.classList.add('dz-success');
mockFile.previewElement.classList.add('dz-complete');
}
Solution 3 - Javascript
my solution for >= 4.0, basing on "How to show files already stored on server": https://github.com/enyo/dropzone/wiki/FAQ
maxFiles: 1,
init: function () {
this.on('maxfilesexceeded', function (file) {
this.removeAllFiles();
this.addFile(file);
});
var mocks = $dropzone.data('dropzone');
for (var i = 0; i < mocks.length; i++) {
var mock = mocks[i];
mock.accepted = true;
this.files.push(mock);
this.emit('addedfile', mock);
this.createThumbnailFromUrl(mock, mock.url);
this.emit('complete', mock);
}
}
Solution 4 - Javascript
Based on punky's excellent answer above, you should not forget to add this._updateMaxFilesReachedClass(); at the end, like so:
init: function () {
var mockFile = { name: <filename>, size: <filesize>, type: <filetype>, url: <file_url> };
this.files.push(mockFile);
this.emit('addedfile', mockFile);
this.createThumbnailFromUrl(mockFile, mockFile.url);
this.emit('complete', mockFile);
this._updateMaxFilesReachedClass();
}
Solution 5 - Javascript
In this answer https://stackoverflow.com/a/17763511, it's implemeneted with emmiting a thumbnail event.
Following is an example of doing it using createThumbnailFromUrl.
HTML element;
<form id="sample-img" action="/upload" class="dropzone">
<div class="dz-default dz-message"></div>
</form>
JS code;
previewThumbailFromUrl({
selector: 'sample-img',
fileName: 'sampleImg',
imageURL: '/images/sample.png'
});
function previewThumbailFromUrl(opts) {
var imgDropzone = Dropzone.forElement("#" + opts.selector);
var mockFile = {
name: opts.fileName,
size: 12345,
accepted: true,
kind: 'image'
};
imgDropzone.emit("addedfile", mockFile);
imgDropzone.files.push(mockFile);
imgDropzone.createThumbnailFromUrl(mockFile, opts.imageURL, function() {
imgDropzone.emit("complete", mockFile);
});
}
Working Samples on JSFiddle:
Solution 6 - Javascript
var mockFile = { name: "banner2.jpg", size: 12345, uuid: "085b2b23-70e7-4175-8355-89937d8d46f2" };
myDropzone.emit("addedfile", mockFile);
myDropzone.options.thumbnail.call(myDropzone, mockFile, "https://your-thumbnail-image.jpg");
On Init-Function of the Dropzone-Object init: function() { call this:
this.on("addedfile", function(file) {
//Access the preview element with file.previewElement and add event listeners, etc... to it.
var a = document.createElement('a');
a.setAttribute('href',"{{{protokoll}}}://{{{HTTP_HOST}}}/a-getfiledb.php?uuid="+file.uuid);
a.setAttribute('class',"btn btn-success");
a.setAttribute('style',"width:50%; margin-top:5px; border-left:1px solid black; cursor:pointer;");
a.innerHTML = "<i class='glyphicon glyphicon-download-alt'></i>";
file.previewTemplate.appendChild(a);
});
Solution 7 - Javascript
I was having hard time with this also. This one as a starting point would have helped even more:
Dropzone.autoDiscover = false; // otherwise will be initialized twice
var myDropzoneOptions = {
maxFilesize: 5,
addRemoveLinks: true,
clickable: true
};
var myDropzone = new Dropzone('#myDropzoneElement', myDropzoneOptions);
var mockFile = { name: "Existing file!", size: 12345 };
myDropzone.options.addedfile.call(myDropzone, mockFile);
myDropzone.options.thumbnail.call(myDropzone, mockFile, "http://url-to-thumb-goes-here");
Solution 8 - Javascript
You can try with this
var file_image = "http://someserver.com/myimage.jpg";
var mockFile = { name: "myimage.jpg", size: 12345 };
$("#dropzone").dropzone({
url: 'false',
maxFiles: 1,
maxFilesize:10,//mb
acceptedFiles:'image/*',
init: function() {
this.on("addedfile", function(file){
this.options.thumbnail.call(this,file,file_image);
});
this.addFile.call(this,mockFile);
}
});
Solution 9 - Javascript
import vue2Dropzone from 'vue2-dropzone'
import 'vue2-dropzone/dist/vue2Dropzone.min.css'
export default {
created(){
let app = this;
app.getAdvertById()
},
data: function () {
return {
advertId: null,
advert: {
title: '',
description: '',
confirm: '',
files: {},
category:'',
city:''
},
adverts: [],
dropzoneOptions: {
url: 'https://httpbin.org/post',
thumbnailWidth: 150,
addRemoveLinks: true,
maxFilesize: 0.5,
dictDefaultMessage: 'Plz add your image here...',
headers: { "My-Awesome-Header": "header value" }
},
}
},
methods: {
getAdvertById(){
let app = this;
let id = app.$route.params.id;
app.advertId = id;
axios.get('/api/v1/advert/show/' + app.advertId)
.then(function (resp) {
app.advert = resp.data
app.advert.files = resp.data.files
for (var i = 0; i < app.advert.files.length; i++) {
var mockFile = {id: app.advert.files[i].id, name: app.advert.files[i].file_name, size: app.advert.files[i].size};
app.$refs.myVueDropzone.manuallyAddFile(mockFile, '/advert/' + app.advert.files[i].file_name )
app.$refs.myVueDropzone.dropzone.options.thumbnail.call(app.$refs.myVueDropzone, mockFile, '/advert/' + app.advert.files[i].file_name)
if (app.$refs.myVueDropzone.dropzone.options.maxFiles > 0) {
app.$refs.myVueDropzone.dropzone.options.maxFiles--
}
}
})
.catch(function () {
alert("Could not load your advert")
});
//console.log(app.advert.files)
},
}
}
<vue-dropzone ref="myVueDropzone" id="dropzone" :options="dropzoneOptions"></vue-dropzone>