Questions tagged [doobie]
Doobie is a pure functional JDBC layer for Scala and Cats.
doobie
8
questions
10
votes
2
answers
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Doobie - lifting arbitrary effect into ConnectionIO CE3
I am trying to migrate project from cats-effect 2 to cats-effect 3, i am using doobie for interacting with database. Previously i could lift ConnectionIO to IO as it was described, but with the ...
- 103
17
votes
1
answer
5k
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Doobie and DB access composition within 1 transaction
Doobie book says that it's a good practice to return ConnectionIO from your repository layer. It gives an ability to chain calls and perform them in one transaction.
Nice and clear.
Now let's ...
- 515
12
votes
1
answer
5k
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Doobie cannot find or construct a Read instance for type T
I'm using doobie to query some data and everything works fine, like this:
case class Usuario(var documento: String, var nombre: String, var contrasena: String)
def getUsuario(doc: String) =
...
- 123
7
votes
2
answers
2k
views
How to execute list of string SQL statements against a PostgreSQL db in Scala using doobie?
I am porting the following 10 lines of Python code to Scala:
import psycopg2
def execute(user, password, database, host, port, *queries):
connection = psycopg2.connect(user=user, password=...
- 33.5k
6
votes
4
answers
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Doobie - lifting arbitrary effect into ConnectionIO
I'm trying to send an email in the same transaction as inserting user into a database with Doobie.
I know that I can lift IO into ConnectionIO by using Async[ConnectionIO].liftIO(catsIO) where catsIO: ...
- 10.8k
4
votes
1
answer
3k
views
How do I convert a java.util.UUID to doobie.syntax.SqlInterpolator.SingleFragment?
I am trying to set up a simple scala app with database using doobie, http4s and circe.
How do I convert a java.util.UUID to doobie.syntax.SqlInterpolator.SingleFragment ?
final case class User(id: ...
- 991
4
votes
1
answer
819
views
How to get optional result in insert statements with Doobie?
I have an optional insert query:
val q = sql"insert into some_table (some_field) select 42 where ...(some condition)"
Running this query with:
q.update.withUniqueGeneratedKeys[Option[Long]]("id")
...
- 941
0
votes
1
answer
1k
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How to read JSON out of Doobie Scala PostgreSQL Database with Circe?
I've tried creating the below implicit so that I can GET/read data from the postgreSQL database. I've tried add in the recommended implicits but they turn grey and seem to be unused.
implicit val get: ...
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