Tenant resolver question

[AlexStavianos]

Hello, my question is regarding the resolve tenant by request domain/subdomain. Where would you keep the list of allowed domains/subdomains? perhaps a master untenanted db/shard? If I read the source right I understand by default the gem will attempt to create a shard/db if the tenant is unknown which can lead to unwanted/spam shards?

[flavorjones]

@AlexStavianos Thanks for the question.

If I read the source right I understand by default the gem will attempt to create a shard/db if the tenant is unknown

No, that's not right. Tenants will never be implicitly created, you will need to explicitly create a tenant by calling .create_tenant.

Where would you keep the list of allowed domains/subdomains? perhaps a master untenanted db/shard?

If you'd like to store untenanted data, you can do that by following the Rails Guide for multiple databases, and having a second abstract connection class in your application, e.g.

class UntenantedApplicationRecord < ActiveRecord::Base
  self.abstract_class = true
  connects_to database: { writing: :untenanted, reading: :untenanted }
end

class ValidSubdomains < UntenantedApplicationRecord
end

and

# config/database.yml
production:
  primary:
    tenanted: true
    adapter: "sqlite3"
    database: "storage/tenants/%{tenant}/main.sqlite3"
  untenanted:
    adapter: "sqlite3"
    database: "storage/untenanted.sqlite3"

Does all that make sense?

[AlexStavianos]

Yeap, thank you very much.

…

On Thu, 18 Sept 2025, 00:17 Mike Dalessio, ***@***.***> wrote: @AlexStavianos <https://github.com/AlexStavianos> Thanks for the question. If I read the source right I understand by default the gem will attempt to create a shard/db if the tenant is unknown No, that's not right. Tenants will never be implicitly created, you will need to explicitly create a tenant by calling .create_tenant. Where would you keep the list of allowed domains/subdomains? perhaps a master untenanted db/shard? If you'd like to store untenanted data, you can do that by having a second abstract connection class in your application, e.g. class UntenantedApplicationRecord < ActiveRecord::Base self.abstract_class = true connects_to database: { writing: :untenanted, reading: :untenanted }end class ValidSubdomains < UntenantedApplicationRecordend and # config/database.ymlproduction: primary: tenanted: true adapter: "sqlite3" database: "storage/tenants/%{tenant}/main.sqlite3" untenanted: adapter: "sqlite3" database: "storage/untenanted.sqlite3" Does all that make sense? — Reply to this email directly, view it on GitHub <#178 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AMVPB6P7KBGMSJF5UA3F3EL3THFYDAVCNFSM6AAAAACGVTPF32VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINBTGU2TKOA> . You are receiving this because you were mentioned.Message ID: <basecamp/activerecord-tenanted/repo-discussions/178/comments/14435558@ github.com>