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Example code of locaine/lcn-image-uploader-bundle

Informations about the package lcn-image-uploader-bundle

LcnFileUploaderBundle

Easy ajax image file uploads for Symfony 2. MIT License. Built upon LcnFileUploaderBundle.

Introduction

This bundle provides enhanced image upload widgets based on LcnFileUploaderBundle. Both drag and drop and multiple file selection are fully supported in compatible browsers.

The uploader delivers files to a folder that you specify. If that folder already contains files, they are displayed side by side with new files, as existing files that can be removed.

The bundle can automatically scale images to sizes you specify. The provided synchronization methods make it possible to create forms in which attached files respect "save" and "cancel" operations.

If need to handle image uploads only, you should check out LcnImageUploaderBundle which extends LcnFileUploaderBundle.

Installation

Step 1: Install dependencies

LcnFileUploaderBundle

Install the required LcnFileUploaderBundle.

jQuery

Make sure that jQuery is included in your html document:

Underscore.js

Make sure that Underscore.js is included in your html document

Step 2: Download the Bundle

Open a command console, enter your project directory and execute the following command to download the latest stable version of this bundle:

This command requires you to have Composer installed globally, as explained in the installation chapter of the Composer documentation.

Step 3: Enable the Bundle

Then, enable the bundle by adding the following line in the app/AppKernel.php file of your project:

Usage

Add/Edit/Remove uploads

Entity Code

If you need to upload files to not yet persisted entities (during creation) then you need to deal with temporary editIds which makes things a little bit more complicated.

In this example, we assume that you want to attach one or more uploaded image files to an existing entity (Demo).

This entity has to implement the ImageGallery interface.

Example:

Controller Code

Fetching $entity and validating that the user is allowed to edit that particular entity is up to you.

In Your Layout

You can skip this step if you are using LcnIncludeAssetsBundle.

Include these stylesheets and scripts in your html document:

Or you can use assetic in your twig template:

The exact position and order does not matter. However, for best performance you should include the link tags in your head section and the script tag right before the closing body tag.

In the Edit Template

====================

Now include the upload widget anywhere on your page:

Full example:

Retrieving existing Uploads

Retrieve Thumbnail URLs in Controller

If you are dealing with image uploads, you can pass a defined size name:

The image sizes are defined per gallery in lcn.image_uploader.galleries parameter:

Retrieve Thumbnail URLs in Twig Template

You can also pass a limit parameter (5 in this example):

If you only need the first thumbnail url, you can get it like this:

If you know the file name (e.g. stored as property on your entity) you can explicitly get the corresponding thumbnail:

Removing Files

When an entity that implements the ImageGallery interface gets deleted, the ImageGalleryEntityEventListener takes care of deleting all corresponding image uploads.

Removing Temporary Files

You should make sure that the temporary files do not eat up your storage.

The following Command Removes all temporary uploads older than 120 minutes


app/console lcn:file-uploader:cleanup --min-age-in-minutes=120
´´´

You might want to setup a cronjob that automatically executes that command in a given interval.

### More Options

As this bundle builds upon [LcnFileUploaderBundle](https://github.com/FaiblUG/LcnFileUploaderBundle) it is worth reading the bundles documentation for more advanced options. 

Limitations
===========

This bundle accesses the file system via the `glob()` function. It won't work out of the box with an S3 stream wrapper.

All versions of lcn-image-uploader-bundle with dependencies

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Requires locaine/lcn-file-uploader-bundle Version 2.*
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