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| disbot4 | <librasteve> seen: SmokeMachine | 13:55 | |
| SmokeMachine | hi! | ||
| librasteve_ | seen: SmokeMachine | ||
| tellable6 | librasteve_, I saw SmokeMachine 2025-08-07T13:55:33Z in #raku: <SmokeMachine> hi! | ||
| SmokeMachine | librasteve_: Hi, I'm here! :) | 13:56 | |
| disbot4 | <librasteve> hi … does Red support polymorphic models, like this Rails example chatgpt.com/share/6894b022-3cd4-80...64c1827ecc | ||
| <librasteve> hope you are well | 13:57 | ||
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| librasteve_ | weekly: glot.io/snippets/h9xwkwdb7z | 14:03 | |
| notable6 | librasteve_, Noted! (weekly) | ||
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| SmokeMachine | librasteve_: I don't like to do that on my DB, but if I understood that correctly, that seems to be what I call `Source and Source-id` on the cookbook (fco.github.io/Red/tutorials/cookbook.html). Could you confirm if that's it? | 14:07 | |
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| disbot4 | <librasteve> looking good, specifically the Rails example wants model Comment to be related to both Posts (see all comments on this Post) and Person (see all comments this person has written) … my understanding is that this can be done with Red since one target model can be included in multiple relationships from multiple other models - so yeah that’s good! | 14:24 | |
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| SmokeMachine | librasteve_: you can also, probably, add that as a role if you want... | 14:26 | |
| librasteve_: if possible, could you share the code you use it, please? (That's ok if you don't...) | 14:29 | ||
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| SmokeMachine | librasteve_: for comments, I probably wouldn't use that... I would probably do something like this: | 14:33 | |
| github.com/FCO/BlogSchema/blob/mas...akumod#L11 | |||
| github.com/FCO/BlogSchema/blob/mas...akumod#L18 | |||
| github.com/FCO/BlogSchema/blob/mas...nt.rakumod | |||
| and for commenting on different "entities", I would probably make a role... after work I can try writing something like that to try... | 14:36 | ||
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| disbot4 | <librasteve> SmokeMachine: for clarity there was an HN news item about ORMs and someone complaining that xyz does not support polymorphism - I wanted to say "use Red - that supports polymorphism and is so cool" ... so this was about me getting my facts straight for the next time it comes up | 16:28 | |
| <librasteve> (no code from me on blog website quite yet ... but one day I'm gonna drop wordpress and use raku!) | 16:29 | ||
| <librasteve> still would be an awesome example | |||
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| disbot4 | <librasteve> lizmat: would you mind taking a look at this issue with crag repl please? github.com/librasteve/raku-App-Crag/issues/13 | 19:03 | |
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| SmokeMachine | librasteve_: www.irccloud.com/pastebin/85rQaqqt/ | 19:17 | |
| librasteve_: www.irccloud.com/pastebin/8y3a36Gg/ | |||
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| lizmat | librasteve answered | 19:23 | |
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| disbot4 | <librasteve> okaay - is the diff wrt some PR or branch? | 19:29 | |
| lizmat | this is the change you should make in your code :-) | 19:30 | |
| I was too lazy to make a PR | |||
| disbot4 | <librasteve> (tx for quick response - I am just too thick to work out how to deploy it) | ||
| <librasteve> .oO | |||
| <librasteve> 2 mins | |||
| lizmat | you could look at the diff's line numbers and just type in the changed lines ? | ||
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| disbot4 | <librasteve> yay | 19:33 | |
| <librasteve> released as 0.0.26 | |||
| <librasteve> touché | 19:34 | ||
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| SmokeMachine | librasteve_: does that make sense? | 19:36 | |
| disbot4 | <librasteve> tbh. I found the role definition code quite mysterious - I think that the Rails concept is much cleaner for user code - wouldnt it be easier for a user to write code with three models and two relationships? [or is there a subtle problem with that, possible deadlock maybe?] | 19:40 | |
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| SmokeMachine | librasteve_: really, mysterious? It’s just a method with a join… | 19:48 | |
| librasteve_ | www.irccloud.com/pastebin/0NSSY3gQ | 19:50 | |
| ^^ I thought maybe like this (untested) and sure that append is not a thing | |||
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| SmokeMachine | librasteve_: I don’t like the rails way because I think it assumes too much… that’s the reason on Red you have to declare the foreign key (is referencing) and the relationship… instead of declaring just the relationship and assume the fk… | 19:51 | |
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| disbot4 | <librasteve> yeah - that's fine ... sorry I just backtracked to your previous examples - L11, L18 and so on ... that;s perfect | 19:53 | |
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| disbot4 | <librasteve> I dont think that this | 19:54 | |
| SmokeMachine | But that code is not polymorphic, right? You have no relationship from comments to photo nor post… | ||
| But you could add 2 pet gods there with joins to change that… | 19:55 | ||
| If you add comment-id on post and photo, each one will only be able to have 1 comment | 19:57 | ||
| disbot4 | <librasteve> 2 pet gods? | 20:01 | |
| SmokeMachine | Sorry??? | ||
| disbot4 | <librasteve> that's what you typed ^^ | ||
| SmokeMachine | S/2 pet gods/2 join methods/ | 20:02 | |
| disbot4 | <librasteve> lol | 20:03 | |
| <librasteve> ok - so what I gather now is that we (both) think that the Rails polymorphic stuff is overkill and pet gods is the way to go | 20:05 | ||
| <librasteve> ie Red has a tighter relationship with the database | 20:06 | ||
| <librasteve> thanks for taking time to explain a bit more about Red to me ... so far (with HARC) it has been awesome! | 20:08 | ||
| SmokeMachine | I don’t think polymorphic is overkill, but I don’t like the way Rails do that… and I would to everything I could to avoid the need of using that… we use that at work… it brings more problems than solutions… | ||
| disbot4 | <librasteve> ok - you are the king of ORM - I will be less harsh on polymorphic as an idea - and more positive that the role example you supplied is a good way | 20:10 | |
| <librasteve> nevertheless | |||
| <librasteve> role Commentable { method comments { my $table = self.^table; self.^rs.join-model: :name<comments>, Comment, -> $entity, $comment { $entity.^id-hash.values.head == $comment.commentable-id && $comment.commentable-type eq $table } } } | 20:11 | ||
| SmokeMachine | I agree that maybe we should have a way to do that with Red that looks more declarative… but I couldn’t find a better syntax… | ||
| disbot4 | <librasteve> ^^ this implementation remains "mysterious" to me | ||
| SmokeMachine | You don’t need to use a role… you could just declare the join methods inside the Post and Photo (as on the cookbook example) | 20:12 | |
| disbot4 | <librasteve> are you defining a join table here (ie 2x columns with foreign keys) | ||
| <librasteve> I like the idea of the join methods - but, as you said, that's not polymorphic | 20:13 | ||
| SmokeMachine | The join method as exemplified on the cookbook and as the role is adding on Post and Photo IS polymorphic… | 20:15 | |
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| SmokeMachine | the polymorphic solution (if I understood correctly) is a way to a “foreign key” “point to more than one table”… so on the table that will have that fk (comment on this case) you have the “fk” (commendable-id) and what table it should point to (commentable-type). | 20:20 | |
| I just had an idea… let me test that | |||
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| disbot4 | <librasteve> i have been rereading the various comments - when you said "that code is not polymorphic" I now see that you meant my code and that the model Comment should reference out rather than the Post/Photo reference in - I misunderstood and thought that you meant your L11, L18 examples are not polymorphic | 20:24 | |
| <librasteve> [I am doing a good impression of the "idiot savant"] | 20:25 | ||
| <librasteve> sorry must &afk - really enjoyed our chat sorry to be so slow | 20:30 | ||
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