Where does the onDelete on relation is applying ?

For instance :

const product = pgTable('product', {
logistics_id: serial('logistics_id')
    .references(() => logistics.id, { onDelete: 'cascade' })
    .notNull(),
})

const product = pgTable('product', {
logistics_id: serial('logistics_id')
    .references(() => logistics.id, { onDelete: 'cascade' })
    .notNull(),
})

Here the cascade delete will occur when I delete my product entity (and so delete the logistic linked to it) Or when I delete the logistic (will delete the product linked to it)

10 Replies

Angelelz•16mo ago

In a one-to-many relation, if you use on delete cascade, only by deleting the one, will delete the many. Not the other way In your case, if you delete a logistics, its corresponding product will be deleted

LouistitiOP•16mo ago

Thanks for your answer ! So I have to delete manually logistics on product delete ?

Angelelz•16mo ago

I can't answer that question, it's kind of a business logic question. I don't know what is the architecture of your app.

LouistitiOP•16mo ago

Alright, thanks anyway !

Angelelz•16mo ago

Is this a one to one or a one to many relation?

LouistitiOP•16mo ago

one to one but my logistics table is used with other tables as well but as using .references() makes the relation mandatory (cannot be null) I cannot put an onDelete on my product table's side

Angelelz•16mo ago

Adding notNull() makes the relation mandatory. The references shouldn't make it mandatory

LouistitiOP•16mo ago

it shouldn't but it does unfortunately

LouistitiOP•16mo ago

https://github.com/drizzle-team/drizzle-orm/issues/1264

GitHub

[BUG]: A foreign key can not be null · Issue #1264 · drizzle-team/...

What version of drizzle-orm are you using? 0.28.6 What version of drizzle-kit are you using? 0.19.13 Describe the Bug I have schema users table like this export const users = pgTable('users'...

LouistitiOP•16mo ago

When I try to create an entity without specifying a relation, I get a foreign key constraint error which is fixed when I remove the .references()

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Where does the onDelete on relation is applying ?