How do I set additionalProperties to false when using an array? - jsonschema

Question

The file being validated looks like this:
MyArray:
- someItemWithRandomName:
one: f9jfw9j302
two: 09dj0293jff
three: 09dj0293jff
- someOtherItemWithRandomName:
one: f9jfw9j302
two: 09dj0293jff
three: 09dj0293jff
- anotherItem:
one: f9jfw9j302
two: 09dj0293jff
three: 09dj0293jff
I'm validating it like this:
"MyArray": {
"type": "array",
"items": {
"type": "object",
"additionalProperties": false,
"required": [
"one",
"two",
"three"
],
"properties": {
"one": {
"type": "string"
},
"two": {
"type": "string"
},
"three": {
"type": "string"
}
}
}
I don't want to allow fields in the array items not defined in the schema but "additionalProperties": false doesn't work because the array item's keys can be any string. How do you accommodate this?
Edit
Here is a live example of my validation. The YAML I assume is going to be converted to JSON like in this example before it's validated: https://www.jsonschemavalidator.net/s/PBmLkkBl

Answer 1

You're missing a level in your schema, to allow the array item's object properties to be named anything.
Try this:
"MyArray": {
"type": "array",
"items": {
"type": "object",
"additionalProperties": {
"type": "object",
"additionalProperties": false,
"required": [
"one",
"two",
"three"
],
"properties": {
"one": {
"type": "string"
},
"two": {
"type": "string"
},
"three": {
"type": "string"
}
}
}
}
If you want to put a restriction on the names used in that intermediary level, you can replace "additionalProperties" with "patternProperties":
...
"patternProperties": {
"^[0-9]$": {
...
}
}
Or if you want to use a schema for the property names, you can use "propertyNames".
https://json-schema.org/understanding-json-schema/reference/object.html

Answer 2

(Posted solution on behalf of the question author to move it to the answer space).
My solution was to just remove the null items of the array because they were not being used. I think the only way to handle this correctly would be to do some kind of conditional validation to allow all properties with null values - if that's even possible.