rom-rb/chat

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Nikita Shilnikov

@flash-gordon

personally, I wrote a lot of SQL so this is a non-issue for me

S.Tamiya

@ablce9

I realized it's really tricky converting SQL code into Sequel. and what worse is Sequel is not that supportive I guess? so I come here and ask for helps and people here are really supportive, thanks.

Nikita Shilnikov

@flash-gordon

We discourage from Sequel when possible, our plan is provide people with the tools required for that

Sequel is sort of low level in general and leaks too much SQL related stuff

OTOH migrations is a different beast

esp data migrations

S.Tamiya

@ablce9

gotcha!

Ethan Turkeltaub

@ethnt

Hi guys, another question. I have a recursive relation: a country has many regions, which has many regions. is there a way to recursively get all of the regions of a country?

countries_repositories.aggregate(region: :region) gets the first two layers but not below that

Piotr Solnica

@solnic

@ethnt there's no special feature to cover this. You could write some smart query yourself to get it effectively.

Ethan Turkeltaub

@ethnt

@solnic Good to know, thanks :+1:

Ethan Turkeltaub

@ethnt

@solnic I guess in a similar vein, is there a recommendation for trees in ROM or just use self-referential associations?

Piotr Solnica

@solnic

I used tree extension in PG for that

Ethan Turkeltaub

@ethnt

If only I could use PG 🙃stuck on MySQL

Piotr Solnica

@solnic

@ethnt that's unfortunate, because the implementation in PG was like few lines of code, I really liked it

we even have a special type for ltree: https://github.com/rom-rb/rom-sql/blob/master/lib/rom/sql/extensions/postgres/types/ltree.rb it gives you custom API for queries like people.select(:name).where { ltree_tags.match_any(['Bottom', 'Bottom.Cities.*']) } :)

Mihai Radulescu

@mihairadulescu

hey guys did anyone experienced lately MySql connection has Gone away when using rom.rb in Aurora Db Mysql ?

Nikita Shilnikov

@flash-gordon

I don't think this kind of issues could be directly related to rom, although it's possible databases close connections after a certain timeout. I know that Sequel has a workaround for that and I'm pretty it sure you can use it with rom

assuming my guess is right ofc

http://sequel.jeremyevans.net/rdoc-plugins/files/lib/sequel/extensions/connection_validator_rb.html

this is an example of building a container with extensions https://github.com/rom-rb/rom-sql/blob/b1ebc39e913e4bd50c886e96da33ec768ba2818e/lib/rom/sql/gateway.rb#L52

Mihai Radulescu

@mihairadulescu

already have that connection validator in place.

Nikita Shilnikov

@flash-gordon

huh

so in any case I would look deeper, maybe search through sequel's issues for advice

or ask Jeremy on the google groups

Mihai Radulescu

@mihairadulescu

yeah will check into sequel groups

Dawid Lenkiewicz

@dawidlenkiewicz

Hey is it possible to write this query without directly calling Sequel?

collection = collection.where { Sequel.|(*search_params.horsepower_ranges_map) }

this search_params.horsepower_ranges_map returns array of hashes like: [ { horsepower: 100..200 }, { horsepower: 500..600} ]

Viet (Drake) Tran

@tiev

@solnic Does rom-roda work with Rom v4?

Viet (Drake) Tran

@tiev

I've tried rom-roda with rom v4 and failed. Do you think the interface of rom-roda should change? Can I contribute to make it work with rom v4?

Vasily Kolesnikov

@v-kolesnikov

@tiev rom-roda looks outdated. But there isn't much sense to use this plugin. You can use rom and roda together without any additional libraries. For example: https://github.com/v-kolesnikov/elias/tree/feature/api_v1

Viet (Drake) Tran

@tiev

ah, it's dry-web-roda

it is promising

Tim Riley

@timriley

dry-web-roda has been retired, @tiev, so we won’t be updating it.

You’ll probably just want to update your app’s rom integration yourself, making whatever changes are required

https://discourse.dry-rb.org/t/philosophy-and-docs/711/2 for more info

Oskar Szrajer

@gotar

@tiev I'm using dry-web-roda, and it's working with ROM 4

I just made few changes to make it works

Piotr Solnica

@solnic

@tiev there's no need for rom-roda, I need to delete this repo. if you want to use rom + roda it's better to either set it up yourself or use dry-web-roda

Viet (Drake) Tran

@tiev

Thanks all.

Viet (Drake) Tran

@tiev

Hi Tim. I like functional oop architecture. Any specific problems that dry-web-roda gets retired?

Piotr Solnica

@solnic

@tiev we've started helping with Hanami and this is where our focus will be, not dry-web-roda. The plan is to make Hanami 2.0 work nicely with dry-rb, its alpha version already supports dry-system. We'll improve other integrations, like dry-validation, dry-view etc. too.

Dawid Lenkiewicz

@dawidlenkiewicz

Hey I've got a query that uses distinct on + order notation. It works well, but in the end I want to order results by some attribute and it looks like initial ordering is overwritten

Dawid Lenkiewicz

@dawidlenkiewicz

end of initial query:

ORDER BY \"car_model_id\", \"finance_rate_cents\"">>

after applying ordering like order { Sequel[column_name].send(order_direction, nulls: :last) }

the end of query changes to order specified above

can I somehow wrap it to force subquery ?

Dawid Lenkiewicz

@dawidlenkiewicz

something like this works:

relations[:offers].new(relations[:offers].dataset.select_all.from(collection.dataset)).order_by(

but doesn't look nice :) Maybe there is a better way?

Piotr Solnica

@solnic

@dawidlenkiewicz can you provide a script that shows this?

Dawid Lenkiewicz

@dawidlenkiewicz

yes, sorry it may not be easy to understand the way I wrote this

I guess the simple example is:

relation:

  def test
    select { %i(car_model_id score horsepower) }.distinct(:car_model_id).order(:car_model_id, :score)
  end

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