The fields object is empty and we do not want it. We even have access to the name of the file with the original extension.
All this information will help us save and manage our files more precisely. Before moving ahead, we have to look at a special case. Since the user can upload multiple files at once, the incoming parsed data will be an array of objects.
So, we have to check each time if we are getting multiple files or single file before working on it further. In the very first step, we are checking if the user has uploaded multiple files or not. We are doing this by checking the length of the myFile property in the files parsed data.
If the length is zero, then it means only a single file has been uploaded. The next step is to take a look at whether the uploaded file is valid or not. We are doing this by creating a special function that goes like this. In this function, we are extracting the original extension of the file uploaded. If it exists in our described valid extensions array, then we can return true, otherwise we return false. If the file is not valid, we are throwing an error.
If it is, we are renaming the file in our files directory with the help of the fs module which is a core module in Node. After that, we can store the name of the file in our MongoDB cloud database that we hosted earlier in this tutorial. Try completing the else block for multiple files on your own!
Here is the whole upload function for reference purposes. With this, if you will try to upload a file or image with a valid extension. It will be saved in your files directory with the name definition that we defined. Also, the file name gets stored in your cloud database so that you can access it on our front end. You can then set either the maximum image height or the width.
Resized images will keep their original size ratio. Change the message on a file upload field from 'Drop a file here or click to upload' to something else. See the field action icons article for more information. Replace x with the ID of the file upload field. Show image : Display the image if the WordPress file is an image file type.
Display an icon if the file is not an image. Add link : Link to the full-sized image. Open link in new tab : Open the link to the image in a new browser tab. The default size displayed is the thumbnail. In WordPress, the default thumbnail size is a x image. Specify a different size to show a bigger image. Show filename : Display the filename of an uploaded WordPress file. Show default image : Check for an image and add a default if there isn't one.
Replace default. WordPress gallery Display uploaded images in a WordPress gallery using this shortcode:. Replace x with the ID of your File Upload field. Read more about the gallery shortcode and its parameters in the WordPress Codex.
If you would like to set a default value in your File Upload field with a file from your WordPress media library, please follow the steps below. For more information on default values, visit the Default values page. If you would like to automatically populate a File Upload field with the most recent value submitted by the current user, follow the steps below.
Replace x with the ID of the File Upload field that you want to retrieve a value from. Save the form and click preview. Now when the page is visited, the uploaded file from the user's previous entry will be shown. If the user is not logged-in, this shortcode will have no effect. All files that are downloaded in a Formidable form are saved to your WordPress media library.
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