vitalydolgov
Accessing Plug Router init options in macros (get, post, etc.)
When I pry into macro (get, post, match, etc.) I see conn and opts, which is always an empty list for me. In def call(conn, state) I see all options, given in child_spec, but I this case macros are not called.
Is it possible to somehow access Plug.Router state/init options in macros?
Trending in Questions
Other Trending Topics
Latest on Elixir Forum
Sponsor Spotlight
Enabling companies to succeed by building software people love.
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
- #elixirconf-us
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #metaprogramming
- #security
- #hex
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.
Error tracking, logs, uptime, and Just Enough APM. Built for developers.
Develop your skills with books, videos, and courses.
Producing high quality Elixir screencasts since 2017.
Enabling companies to succeed by building software people love.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
First 3 of 3 Posts!
qhwa
What kind of state do you need?
I may be counter-intuitive that options fed into the
callcallback function, which is executed at run time, come frominit/1which is executed at compile time.luizmiranda7
As you can read here: Metaprogramming · Elixir School macros “special functions designed to return a quoted expression that will be inserted into our application code” , that’s why so hard to debug it with pry. I would recommend in this scenario a more conservative approach with IO.inspect or something like that.
benwilson512
When you pry into a macro you get AST, not values. If you confuse these you won’t make any progress with macros. Macros are not passed values, they are passed “code structures” that describe the shape of the code in the macro value.