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  • 16:14
    straight-shoota labeled #9803
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From IRC (bridge bot)
@FromIRC
<riza> syntastic might also have an lsp mode, but i dont remember
<wwalker> riza: Thanks. I've never used vim-ale, may be a good time to switch to it from syntastic. I rock back and forth between being a developer and a sre/sysad/devops every few years. Today, as an SRE, I needed to do some serious dev work, used to do a lot of ruby (10 years ago) so crystal looked good.
Lance Dillon
@riffraff169
so puppet instead of ansible
From IRC (bridge bot)
@FromIRC
<riza> wwalker: hey that sounds like how i work, welcome to the language and i hope you find what you need in it
WintonMc
@WintonMc_twitter
y este lenguaje tiene GUI para trabajar?
George Dietrich
@Blacksmoke16
There are a few GUI libs, but I wouldn't say that's crystal's strongest area at the moment
From IRC (bridge bot)
@FromIRC
<Elouin> Is there some library for receiving emails? i only found libs for sending mails.
George Dietrich
@Blacksmoke16
not that im aware of
From IRC (bridge bot)
@FromIRC
<Elouin> Ahh, https://github.com/annwyl/crystal-lang-imap . but no update since over a year.
George Dietrich
@Blacksmoke16
ah nice, if it was written for 1.0 probably still works
From IRC (bridge bot)
@FromIRC
<riza> Elouin: if you've got a web service running, a decent pattern is to use a postfix plugin to act on a received email and then post it to an api endpoint
<riza> email being so notoriously overridden with bugs and exploits, it's probably worth relying on an establish project to handle the bulk of the work and just hooking the output of their stuff
From IRC (bridge bot)
@FromIRC
<Elouin> I just want a small mailinglist application, no web service.
From IRC (bridge bot)
@FromIRC
<riza> Elouin: makes sense. looking at the options for postfix, that might still be a nice option. https://www.postfix.org/FILTER_README.html
From IRC (bridge bot)
@FromIRC
<Elouin> riza: but if I use IMAP to get the mails from some provider, isnt then something like that already on the server?
From IRC (bridge bot)
@FromIRC
<riza> Elouin: oh, probably. Then you're using gmail or whatever as your mail server, sure.
From IRC (bridge bot)
@FromIRC
<Elouin> since gmail will soon have no imap anymore not that, but yeah.
From IRC (bridge bot)
@FromIRC
<riza> I hadn't heard that...seems like a strange move to me. But ok
moe
@moe:busyloop.net
[m]
is there any way to get at the return type that crystal magically determines for a method during compilation when none is explicitly specified?
i assume probably not :/
From IRC (bridge bot)
@FromIRC
<Guest38> Hey folks. If someone has a wikipedia account they could modify the page for Rust to mention Crystal as well. Seems pretty fitting among the listed languages in this sentence: "... commented on Rust's chances of becoming a competitor to C++ and to the other up-and-coming languages D, Go, and Nim (then Nimrod)"
From IRC (bridge bot)
@FromIRC
<jhass[m]> You don't need an account to edit wikipedia, https://en.wikipedia.org/w/index.php?title=Rust_(programming_language)&action=edit
George Dietrich
@Blacksmoke16
@moe:busyloop.net no, because it could probably change? If possible this is why its just easier to add a return type
3 replies
Quinton Miller
@HertzDevil
the def is separately instantiated for each set of argument types, so there isn't "an" inferred return type of the def
moe
@moe:busyloop.net
[m]
hmm makes sense. guess what i'd like is a way to inspect all the def's that are generated.
but i see why that isn't exactly feasible.
moe
@moe:busyloop.net
[m]
well, in principle, yes. hmm, maybe i'm indeed making it too complicated.
i'll see how far i can get by forcing that def to be explicit.
George Dietrich
@Blacksmoke16
only exception is error responses, but if you raise them, they technically wouldnt be returned and you could handle that elsewhere
moe
@moe:busyloop.net
[m]
yeh, those i already got covered. in the renderer for an exception type you can declare whether it should automatically be injected into the swagger docs for all endpoints (useful for all the base-exceptions that can happen on any endpoint). and endpoints can declare the additional exceptions that they may throw (no way to discover them otherwise).
actually happy with how that part looks. thought that would be the harder one, but turns out the return types is actually more tricky as it fans out into return-type(s) -> renderer -> content-types.
getting that stuff to work at runtime was surprisingly easy (yay for crystal!). now discovering it before runtime to build those swagger docs. uff.
George Dietrich
@Blacksmoke16
i just made them required in athena, for diff reasons but the point is the same
not super familiar with swagger, but i know they have a concept of models of which you'd use to represent the response yea? then from there is prob a way to show how they are rendered given various content types?
i.e. the core type of the response doesnt change, just its representation
serialized representation that is
moe
@moe:busyloop.net
[m]

ha, yea, you're pointing right at the hard part.
at first i had the models generate their swagger-schema.

but then i realized, endpoints often only return a partial view of a model
(i.e. you don't want to include the password-field with users and don't want
that mentioned in the swagger-docs either).

so... it's kinda annoying, i guess my renderers (aka serializers)
have to be aware both of their model and the endpoint.

maybe it's just not solvable without really forcing the user
to explicitly declare it...

George Dietrich
@Blacksmoke16
prob a good idea to have a separate object used to represent payload/responses versus assuming that is going to match the DB model 1:1
crystal stdlib and some shards have the ability to like exclude serializing the password on serialize but accept it on deserialize, but DTO would be a more robust way to go about that imo
esp for more complex models so that the structure of the request doesnt need to be tightly coupled to the db schema
moe
@moe:busyloop.net
[m]
yea, rails has ActiveModelSerializer for this. guess i may just want too much ("just return whatever you want, we'll render & auto-doc it").
works fine up to the point of auto-doc'ing & validating the input parameters. but the return value, that's really a tough cookie.
George Dietrich
@Blacksmoke16
ultimately you'd need to define what those validations are somewhere
using a DTO for that would get you that + the structure of the request
and have another for the response that describes the response
moe
@moe:busyloop.net
[m]
yup. i'll dig more into it in the coming days.
George Dietrich
@Blacksmoke16
could use the validation component for that ;)
but sounds good :+1:
Hayden Jones
@wrq
does crystal having anything like timeit for python? I've never profiled before, but I'm trying to determine where to use Structs and where to use tuples and such in a large data model, and I was hoping to put together numbers for the performance of each design
George Dietrich
@Blacksmoke16
structs and tuples are both on the stack so they'd be essentially the same. Is suggested to use structs over tuples/namedtuples majority of the time anyway
Hayden Jones
@wrq
okay, that makes sense