chare
Phoenix 1.7 File Upload and Download
I’m trying to figure out how to do file download and upload in phoenix for the first time using Phoenix 1.7.1. Is there a guide on how to do this that I’ve someone not found? Say that I want a resource for books with no liveview. With the following command I get urls for creating, editing, viewing books.
mix phx.gen.html Books Book books title:string author:string
But what if I want the forms to have in addition to title and author an upload for a pdf where it is stored in the database as a binary blob alongside the title and author. What is the idiomatic way I’m suppose to do that in Phoenix. Also what is the idiomatic url route I’m suppose to use to expose downloading the file? I’ve never done this before so I don’t know what would be the restful conventions in Phoenix for this.
Marked As Solved
KungPaoChicken
When a file input is submitted, information about it it put in a Plug.Upload struct that can be accessed from the params in the controller. There was an official blog post explaining how it works, the code examples should work with minor changes.
From there you can copy the temporary file to the filesystem or S3 or somewhere else, and save the path as a string in the database. I remember saving binary blobs into the database was not recommended for performance reasons, but databases have changed a lot and I am not up-to-date with current features/best practices.
Downloads can be done with send_download/3 from the controller. A route like get "/books/:id/download" should be alright.
Popular in Questions
Other popular topics
Latest Phoenix Threads
Latest on Elixir Forum
Sponsor Spotlight
Real-time error tracking, performance insights, and observability for devs.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #deployment
- #library
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #channels
- #elixirconf
- #exunit
- #discussion
- #code-sync
- #javascript
- #podcasts
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #elixir-ls
- #phoenix_html
- #iex
- #blog-post
- #graphql
- #genstage
- #ai
- #websockets
- #supervisor
- #advent-of-code
- #elixirconf-us
- #distillery
- #processes
- #forms
- #api
- #metaprogramming
- #security
- #performance
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Real-time error tracking, performance insights, and observability for devs.
Develop your skills with books, videos, and courses.
Enabling companies to succeed by building software people love.
The deployment platform built for Elixir: PaaS ease, VPS control.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"