jsonSchema nested attribute conditionally required - jsonschema

Question

In jsonschema, how can we make some of the inner attributes required based on the field values present outside.
In the following example,
{
"type" : "a/b/c",
"args": {
"propA1": "",
"propA2": "",
"propB1": "",
"propC1": "",
"propC2": "",
"c1": "",
"c2": "",
"c3": ""
}
}
type can be a or b or c. args is always required.
conditions are,
propA1, propA2 are required if type is a,
propB1 is required if type is b and,
propC1, propC2 are required if type is c.
c1, c2 and c3 are always required
What I have done so far is,
"properties": {
"type": {"enum": ["a", "b", "c"]},
"args": {
"type": "object",
"properties": {
"propA1": {"type":"string" },
"propA2": {"type":"string" },
"propB1": {"type":"string" },
"propC1": {"type":"string" },
"propC2": {"type":"string" },
"c1": {"type":"string" },
"c2": {"type":"string" },
"c3": {"type":"string" }
}
"required": ["c1", "c2", "c3"]
}
"anyOf": [{
"type": {"enum": ["a"]}
// how to specify required for inner properties of args?
}, {
"type": {"enum": ["b"]}
}, {
"type": {"enum": ["c"]}
}]
},
"required": ["type", "args"]
Here how can we specify required for inner properties without repeating common properties in each object of anyOf?

Answer 1

You need to use "properties" inside of the "anyOf" the same way you use it in the main schema. So just put both "type" (with the appropriate single-value "enum" and then "args" with the appropriate "required" inside of it. You do not need to repeat the other contents of "args". It should look like this (although I haven't tested it).
"properties": {
"type": {"enum": ["a", "b", "c"]},
"args": {
"type": "object",
"properties": {
"propA1": {"type":"string" },
"propA2": {"type":"string" },
"propB1": {"type":"string" },
"propC1": {"type":"string" },
"propC2": {"type":"string" },
"c1": {"type":"string" },
"c2": {"type":"string" },
"c3": {"type":"string" }
}
"required": ["c1", "c2", "c3"]
}
"anyOf": [{
"properties": {
"type": {"enum": ["a"]},
"args": {
"required": ["propA1", "propA2"]
}
}
}, {
"properties": {
"type": {"enum": ["b"]},
"args": {
"required": ["propB1"]
}
}
}, {
"properties": {
"type": {"enum": ["c"]},
"args": {
"required": ["propC1", "propC2"]
}
}
}]
},
"required": ["type", "args"]