Swagger json, block "definitions" - different required fields in specific methods - json

Question

I have a simple swagger.json file, Product rest api with 2 methods: post (add new product) and put (update) and I want to define "name", "price" fields of Product definition as required for POST method but not for a PUT method.
How can i do that without code duplication?
There is my swagger.json file
{
"paths" : {
"/products" : {
"post" : {
"summary" : "Add a new product",
"operationId" : "addProduct",
"consumes" : [ "application/json" ],
"produces" : [ "application/json" ],
"parameters" : [ {
"in" : "body",
"name" : "data",
"description" : "Product object that needs to be added to the store",
"required" : true,
"schema" : {
"$ref" : "#/definitions/Product",
"required": ["name", "price"] // <-------- not working
}
} ]
},
},
"/products/{id}" : {
"put" : {
"summary" : "Update a product",
"operationId" : "updateProduct",
"consumes" : [ "application/json", "multipart/form-data" ],
"produces" : [ "application/json" ],
"parameters" : [
{
"in" : "path",
"name" : "id",
"description" : "Product id",
"required" : true,
"type": "integer",
"format": "uint"
},
{
"in" : "body",
"name" : "data",
"description" : "Product data for update",
"required" : true,
"schema" : {
"$ref" : "#/definitions/Product"
}
}
]
}
}
},
"definitions" : {
"Product": {
"type": "object",
"required": ["name"],
"properties": {
"name" : {
"type" : "string"
},
"price": {
"type": "number",
"format": "float"
}
}
}
}
}