A developer implements file upload functionality for a NestJS backend. The process involves configuring Multer for handling multi-part form data, setting up disk storage for file saving, and applying custom validation pipes to ensure correct file types and sizes for product images.
Length 10:00
Captions English (Generated), Spanish (Auto-translated), French (Auto-translated), Korean (Auto-translated), Portuguese (Auto-translated), Vietnamese (Auto-translated) #nestjs #multer #file upload #backend development #programming #coding tutorial #web development #typescript #image upload
0:00 All right, so next I want to add the ability to 0:02 upload a product 0:04 image for a new product when we add one here, and then display 0:07 it in our product listing. 0:10 Let's go ahead and start off by adding this functionality in our 0:14 NestJS backend. 0:16 Now we're gonna need a couple of dependencies to handle file 0:20 uploads. Now, when we receive these file upload 0:23 requests for our Next.js application, we want to take the file and 0:27 actually store it on our NestJS server directly, and then 0:31 offer the ability to actually serve those images as static 0:35 content through the NestJS server. 0:38 NestJS makes both of these tasks very easy to accomplish, so let's go ahead 0:42 and see how we can do it. So to start off, we're gonna need a couple of 0:45 dependencies. So let's open up a new terminal and 0:49 install 0:51 save nestjs 0:53 serve-static. So this is going to be a 0:57 dependency we need to actually serve these product images that we're gonna 1:01 upload to our server. 1:03 And then we're going to re-install the types, so 1:06 save dev types/multer if we don't 1:10 already have it. So Multer is the underlying library 1:13 that will parse this 1:14 multi-part form data and actually populate a file 1:18 object that we can work with. It's also gonna allow us to directly store 1:22 any files that are uploaded to the server locally, which is exactly what we 1:26 want to do. So let's go into our products controller, 1:30 where we're gonna go ahead and implement the route to upload our 1:34 product 1:34 image. So I'm gonna go ahead and add a new post route. 1:39 And the way I want this to work, immediately after we make a call to 1:42 successfully create a product on our server, I want to then 1:46 make another call from the Next.js client to upload the image for
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