Preventing dependent property validation when the parent property does not exist - jsonschema

Question

I am new to JSON schemas. I have a property (property1) that is dependent on another property (property2), which in turn is dependent on a third property (property3). I am trying to figure out how to prevent the schema from validating property1 if property2 doesn't exist. I am using the Python jsonschema module for validating.
I have a simple schema with three properties: species, otherDescription, and otherDescriptionDetail. The rules I'm trying to enforce are:
1) if species = "Human", otherDescription is required.
2) if species = "Human" and otherDescription != "None", otherDescriptionDetail is required.
3) if species != "Human", neither of the other two fields is required.
My test JSON correctly fails validation if species is "Human" and otherDescription doesn't exist, but it also reports that otherDescriptionDetail is a required property even though at this point it shouldn't be because there is no otherDescription value to compare it against. Is it possible to implement this logic with a JSON schema?
This is my schema:
"$schema": "http://json-schema.org/draft-07/schema#",
"$id":"http://example.com/test_schema.json",
"title": "annotations",
"description": "Validates file annotations",
"type": "object",
"properties": {
"species": {
"description": "Type of species",
"anyOf": [
{
"const": "Human",
"description": "Homo sapiens"
},
{
"const": "Neanderthal",
"description": "Cave man"
}
]
},
"otherDescription": {
"type": "string"
},
"otherDescriptionDetail": {
"type": "string"
}
},
"required": [
"species"
],
"allOf": [
{
"if": {
"properties": {
"species": {
"const": "Human"
}
}
},
"then": {
"required": ["otherDescription"]
}
},
{
"if": {
"allOf": [
{
"properties": {
"species": {
"const": "Human"
},
"otherDescription": {
"not": {"const": "None"}
}
}
}
]
},
"then": {
"required": ["otherDescriptionDetail"]
}
}
]
}
My test JSON is:
{
"species": "Human"
}
The output that I want:
0: 'otherDescription' is a required property
The output that I am getting:
0: 'otherDescription' is a required property
1: 'otherDescriptionDetail' is a required property
Any help would be greatly appreciated.

Answer 1

You need to defined otherDescription as a required property insilde allOf. Otherwise allOf block will pass even if otherDescription not available.
"if": {
"allOf": [
{
"properties": {
"species": {
"const": "Human"
},
"otherDescription": {
"not": {"const": "None"}
}
},
"required": ["otherDescription"]
}
]
},
"then": {
"required": ["otherDescriptionDetail"]
}