Using multiple mutations in one call - graphql

Question

I have written my first script that utilises GraphQL (Still a learning curve)
Currently i am making 3 calls using GraphQL,
First is a product lookup,
Second is a Price Update,
Third is a Inventory Update.
To reduce the number of calls to the end point i wanted to merge both Price update and Inventory, But i am having 0 luck, i dont know if its bad formatting.
Here is my GraphQL Code (I am using Postman to help ensure the schema is correct before taking it to PHP)
mutation productVariantUpdate($input: ProductVariantInput!) {
productVariantUpdate(input: $input) {
product {
id
}
productVariant {
id
price
}
userErrors {
field
message
}}
second: inventoryActivate($inventoryItemId: ID!, $locationId: ID!, $available: Int) {
inventoryActivate(inventoryItemId: $inventoryItemId, locationId: $locationId, available: $available) {
inventoryLevel {
id
available
}
userErrors {
field
message
}
}
}
}
Variables:
{
"inventoryItemId": "gid://shopify/InventoryItem/XXXXXXXXXXX",
"locationId": "gid://shopify/Location/XXXXXXXXXX",
"available": 11 ,
"input": {
"id": "gid://shopify/ProductVariant/XXXXXXXXX",
"price": 55
}
}
Error i keep getting:
{
"errors": [
{
"message": "Parse error on \"$\" (VAR_SIGN) at [29, 29]",
"locations": [
{
"line": 29,
"column": 29
}
]
}
]
}

Answer 1

The way that you'd go about this is by specifying all your arguments at the root of your mutation, just like you did for ProductVariantInput:
mutation batchProductUpdates(
$input: ProductVariantInput!
$inventoryItemId: ID!
$locationId: ID!
$available: Int
) {
productVariantUpdate(input: $input) {
product { id }
productVariant { id price }
...
}
inventoryActivate(
inventoryItemId: $inventoryItemId
locationId: $locationId
available: $available
) {
inventoryLevel { id available }
...
}
}
Here's an example how this would work if you were to use fetch in JavaScript:
fetch("https://example.com/graphql", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
query: `
mutation MyMutation($firstId: Int, $secondId: Int) {
m1: ToggleLike(id: $firstId) {
id
}
m2: ToggleLike(id: $secondId) {
id
}
}
`,
variables: {
firstId: 1,
secondId: 2
}
})
})
Hope this helps.