inspired by http://fruzenshtein.com/akka-http-another-one-validation-directive/
- 2.11
- 2.12
see example
first, create class and validation.
case class Tag(
id: Int,
text: String
)
object TagValidator extends Validator[Tag] {
private def idRule: Validation =
genValidation(
"id",
tag => tag.id <= 0,
"id must be positive"
)
private def textRule: Validation =
genValidation(
"text",
tag => tag.text.isEmpty,
"text must not be empty"
)
val validations = Seq(idRule, textRule)
}then, create validation Directives
import com.github.uryyyyyyy.akkahttp.validation.ValidationDirectiveBase
trait CustomValidationDirectives extends ValidationDirectiveBase {
implicit val tagV = TagValidator
}then, extends its Directives & use directive method
object Main extends CustomValidationDirectives with CustomJsonFormat {
val route = post {
path("tag") {
validateModel(asV[Tag]) { validatedTag =>
complete(validatedTag)
}
}
}
}(you can run example)
# valid pattern
$ curl --silent -X POST -H "Content-Type: application/json" http://localhost:9000/tag -d '{"id": 1, "text": "tag1"}' | jq
# invalid pattern
$ curl --silent -X POST -H "Content-Type: application/json" http://localhost:9000/tag -d '{"id": -1, "text": ""}' | jq
{
"error": "validation error.",
"details": {
"id": "id must be positive",
"text": "text must not be empty"
}
}
# valid pattern
$ curl --silent -X POST -H "Content-Type: application/json" http://localhost:9000/tags -d '[{"id": 1, "text": "tag1"}]' | jq
# invalid pattern 1
$ curl --silent -X POST -H "Content-Type: application/json" http://localhost:9000/tags -d '[{"id": 1, "text": "tag1"}, {"id": -1, "text": ""}]' | jq
{
"error": "validation error.",
"details": {
"1": {
"id": "id must be positive",
"text": "text must not be empty"
}
}
}
# invalid pattern 2
$ curl --silent -X POST -H "Content-Type: application/json" http://localhost:9000/tags -d '[]' | jq
{
"error": "validation error.",
"details": [
"list must not be empty",
"must not be empty2. (if you want, you can set more validation)"
]
}
# invalid pattern 3
$ curl --silent -X POST -H "Content-Type: application/json" http://localhost:9000/tags -d '[{"id": 1, "text": "tag1"}, {"id": 2, "text": "tag2"}, {"id": 3, "text": "tag3"}]' | jq
{
"error": "validation error.",
"details": [
"list must be less than 3"
]
}
# valid pattern
$ curl --silent -X POST -H "Content-Type: application/json" http://localhost:9000/nestedTag -d '{"tag": {"id": 1, "text": "tag1"}, "tags": [{"id": 2, "text": "tag2"}]}' | jq
# invalid pattern
$ curl --silent -X POST -H "Content-Type: application/json" http://localhost:9000/nestedTag -d '{"tag": {"id": -1, "text": "tag1"}, "tags": []}' | jq
{
"error": "validation error.",
"details": {
"tag": {
"id": "id must be positive"
},
"tags": [
"list must not be empty",
"must not be empty2. (if you want, you can set more validation)"
]
}
}