Jolt update all 0 value to 1 - json

Question

I would like to know in Jolt, how do I count the number of levels I need to moved up to get the required data.
I played around the Jolt spec to convert value in "quantity" from 0 to 1
Input
{
"items": [
{
"product": {
"name": "product1",
"id": "001"
},
"quantity": 1
},
{
"product": {
"name": "product2",
"id": "002"
},
"quantity": 0
},
{
"product": {
"name": "product3",
"id": "003"
},
"quantity": 0
}
]
}
The expected output
{
"items": [
{
"product": {
"name": "product1",
"id": "001"
},
"quantity": 1
},
{
"product": {
"name": "product2",
"id": "002"
},
"quantity": 1
},
{
"product": {
"name": "product3",
"id": "003"
},
"quantity": 1
}
]
}
Jolt spec with some notes for what I understand.
[
{
"operation": "shift",
"spec": {
"items": {
"*": {
"quantity": {
"0": {
"#1": "items.[&3].quantity" //[&3] => I move 3 levels up to items.* to get index?
},
"*": {
"#(2,quantity)": "items.[&3].quantity" //#(2,quantity) => I move 2 levels up to get items.*.quantity value?
}
},
"*": "items.[&1].&" //[&1] => I move 1 level up to items.* to get index?
}
}
}
},
{
"operation": "modify-overwrite-beta",
"spec": {
"items": {
"*": {
"quantity": "=toInteger(#(1,quantity))"
}
}
}
}
]
Do I understand it correctly? Please advice.
Thanks you

Answer 1

As much as I understand, you want to reflect the first quantity value within the items array to all other quantity values of the other objects. Then you can use these shift transformations :
[
{
"operation": "shift",
"spec": {
"items": {
"0": {
"#": "&"
},
"*": {
"#(0,product)": "&.product",
"#(2,&1[0].quantity)": "&.quantity"
}
}
}
},
{
"operation": "shift",
"spec": {
"*": "items"
}
}
]