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Add example of querying with a WHERE IN clause #829

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Add example of querying with a WHERE IN clause
GitsMcGee Mar 27, 2023
fa8a6d5
Fix typo
GitsMcGee Mar 29, 2023
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11 changes: 11 additions & 0 deletions modules/docs/src/main/paradox/reference/Encoders.md
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Expand Up @@ -78,6 +78,17 @@ val enc = (varchar ~ int4).values
sql"INSERT INTO person (name, age) VALUES ${enc.list(3)}"
```

Similarly, the `values` and `list` combinators can be used to encode an `IN` clause for queries.

```scala mdoc:nest
case class Person(name: String, age: Int)

val names = List("Ron", "Leslie", "Andy")
val namesEnc = varchar.values.list(names.length)

sql"SELECT * FROM person WHERE name IN $namesEnc"
```

## Transforming the Input Type

An `Encoder[A]` consumes a value of type `A` and encodes it for transmission Postgres, so it can
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