JSON schema definition with multiple sets of enums for array attribute - jsonschema

Question

I want to create a JSON schema for an object in which one of the attributes is restricted to multiple sets of enums.
For example:
{
"data": {
"type": "myObject",
"attributes": {
"states": [
"Washington",
"Oregon",
"California"
]
}
}
}
is a valid JSON object against the schema.
And
{
"data": {
"type": "myObject",
"attributes": {
"states": [
"British Columbia",
"Alberta",
"Ontario"
]
}
}
}
is also a valid JSON object agains the schema
BUT,
{
"data": {
"type": "myObject",
"attributes": {
"states": [
"Washington",
"Oregon",
"Alberta"
]
}
}
}
is NOT a valid JSON object against the schema.
I have tried the following schema definition:
{
"type": "object",
"properties": {
"data": {
"type": "object",
"properties": {
"type": {
"type": "string"
},
"attributes": {
"type": "object",
"properties": {
"states": {
"type": "array",
"items": {
"oneOf": [
{
"enum": ["Washington","Oregon","California"],
"description": "United States"
},
{
"enum": ["British Columbia","Alberta", "Ontario"],
"description": "Canada"
}
]
},
"description": "Filter by states"
}
}
}
}
}
}
}
But with this schema above this is still considered valid:
{
"data": {
"type": "myObject",
"attributes": {
"states": [
"Washington",
"Oregon",
"Alberta"
]
}
}
}
BTW, you can use this for testing whether a JSON object conforms to a schema: https://www.jsonschemavalidator.net/
Thank you!

Answer 1

You need to invert the order of the oneOf and the items keywords, so that the same oneOf clause is used for all items:
...
"states": {
"type": "array",
"oneOf": [
{
"items": {
"enum": ["Washington","Oregon","California"],
"description": "United States"
}
},
{
"items": {
"enum": ["British Columbia","Alberta", "Ontario"],
"description": "Canada"
}
}
]
},
...