8 replies

Combining TypeScript Effects with Slonik Transactions

I am trying to organize a piece of code that heavily depends on https://github.com/gajus/slonik with effect. So far so good but I cannot find the way to ergonomically consume such APIs as

await connection.transaction(async transaction => {
  await transaction.query(...)
  await transaction.query(...)
})

await connection.transaction(async transaction => {
  await transaction.query(...)
  await transaction.query(...)
})

^ it opens a db transaction when the callback starts executing and closes it when it resolves

I have functions like

doStuff = (transaction) => Effect

doStuff = (transaction) => Effect

and

doOtherStuff = (transaction) => Effect

doOtherStuff = (transaction) => Effect

and I cannot figure out how to combine them with

Effect.tryPromise(...)

Effect.tryPromise(...)

Within the

.tryPromise

.tryPromise

callback I cannot

yield*

yield*

and have to resort to

Effect.runPromise

Effect.runPromise

for these

doStuff / doOtherStuff

doStuff / doOtherStuff

helpers. But then I also need to manually re-bind all dependencies for these helpers from the parent effect. Alternatively I could convert my helpers to

doStuff = (transaction) => Promise

doStuff = (transaction) => Promise

but then I will lose all the Effect's benefits. I have a feeling that there should be a better way of doing it but cannot figure it out

Any help would be appreciated

Effect Community•2y ago•

8 replies

wasd171

Combining TypeScript Effects with Slonik Transactions

I am trying to organize a piece of code that heavily depends on https://github.com/gajus/slonik with effect. So far so good but I cannot find the way to ergonomically consume such APIs as

await connection.transaction(async transaction => {
  await transaction.query(...)
  await transaction.query(...)
})

await connection.transaction(async transaction => {
  await transaction.query(...)
  await transaction.query(...)
})

^ it opens a db transaction when the callback starts executing and closes it when it resolves

I have functions like

doStuff = (transaction) => Effect

doStuff = (transaction) => Effect

and

doOtherStuff = (transaction) => Effect

doOtherStuff = (transaction) => Effect

and I cannot figure out how to combine them with

Effect.tryPromise(...)

Effect.tryPromise(...)

Within the

.tryPromise

.tryPromise

callback I cannot

yield*

yield*

and have to resort to

Effect.runPromise

Effect.runPromise

for these

doStuff / doOtherStuff

doStuff / doOtherStuff

helpers. But then I also need to manually re-bind all dependencies for these helpers from the parent effect. Alternatively I could convert my helpers to

doStuff = (transaction) => Promise

doStuff = (transaction) => Promise

but then I will lose all the Effect's benefits. I have a feeling that there should be a better way of doing it but cannot figure it out

Any help would be appreciated

Combining TypeScript Effects with Slonik Transactions

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