Json Schema: Require a property only when a specific property is present - json

Question

good day everyone, I am new here,
I have a json response looking like this
{
"Number": "20.09.00001",
"Supplier": {
"Name": "John Doe",
"Title": "Mr.",
"FirstName": "John",
"LastName": "Doe",
"Phone": "0212341234",
"Email": "foobar#gmail.com",
"Code": "Foo123",
"Gender": "Male"
}
}
I want to make inside the supplier properties required so I make a JSON schema validation looking like this
{
"type": "object",
"required": [
"Supplier"
],
"properties": {
"Supplier": {
"type": "object",
"required": [
"Name",
"Title",
"FirstName",
"LastName",
"Phone",
"Email",
"Code",
"Gender"
],
"properties": {
"Name": {
"type": "string"
},
"Title": {
"type": "string"
},
"FirstName": {
"type": "string"
},
"LastName": {
"type": "string"
},
"Phone": {
"type": "string"
},
"Email": {
"type": "string"
},
"Code": {
"type": "string"
},
"Gender": {
"type": "string"
}
}
}
}
}
but the problem is, the inside of supplier properties are not always present, when it's not supplied, it will only return empty objects like this
{
"Number": "20.09.00001",
"Supplier": {}
}
how can I validate only IF the inside supplier returns full property object, and ignore if the supplier returns an empty object?
I have tried using if else and anyOff but resulting in no luck.
my code with if else that did not work:
"Supplier": {
"type": ["object"],
"if": {
"properties": {
"Name": {
"type": ["string", "null"]
},
"Title": {
"type": ["string", "null"]
},
"FirstName": {
"type": ["string", "null"]
},
"LastName": {
"type": ["string", "null"]
},
"Phone": {
"type": ["string", "null"]
},
"Email": {
"type": ["string", "null"]
},
"Code": {
"type": ["string", "null"]
},
"Gender": {
"type": ["string", "null"]
}
}
},
"then": {
"required": [
"Name",
"Title",
"FirstName",
"LastName",
"Phone",
"Email",
"Code",
"Gender"
]
},
"else": {
"required": []
}
}

Answer 1

I think anyOf is the best approach in this case. The object is either empty or all the properties are required. There are a couple of way to assert that an object is empty. You could use "maxProperties": 0 or "const": {}.
{
"type": "object",
"properties": {
... all your properties ...
},
"anyOf": [
{ "const": {} },
{ "required": [ ... all required properties ... ] }
]
}