How to use orderBy for graphQL - graphql

Question

I am trying to sort reservesUSD of nested object dailyPoolSnapshots In descending order by timestamp and return it's first value (in other words, return the latest entry).
I know almost nothing of GraphQL and it's documentation seems confusing and scarce. Can someone help me to figure out how to sort my objects?
I am using subgraphs on the Ethereum mainnet for Curve.fi to get information about pools
My code:
pools(first: 1000) {
name
address
coins
coinDecimals
dailyPoolSnapshots(first: 1,
orderBy:{field: timestamp, order: DESC}) {
reservesUSD
timestamp
}
}
}
It throws and error:
"errors": [
{
"locations": [
{
"line": 0,
"column": 0
}
],
"message": "Invalid value provided for argument `orderBy`: Object({\"direction\": Enum(\"DESC\"), \"field\": Enum(\"timestamp\")})"
}
]
}```

Answer 1

Here is your solution
{
pools(first: 1000) {
name
address
coins
coinDecimals
dailyPoolSnapshots(first: 1,
orderBy: timestamp, orderDirection:desc) {
reservesUSD
timestamp
}
}
}
In the playground, you have the doc on the right, you can search dailyPoolSnapshots, if you click on it, you will have the documentation of this query
Sample for this query:
Type
[DailyPoolSnapshot!]!
Arguments
skip: Int = 0
first: Int = 100
orderBy: DailyPoolSnapshot_orderBy
orderDirection: OrderDirection
where: DailyPoolSnapshot_filter
block: Block_height
Arguments are all the params you can use

Answer 2

The orderBy and orderDirection are separate query params, and orderDirection needs to be lowercase for their enum syntax.
{
platforms(first: 5) {
id
pools {
id
dailyPoolSnapshots(first: 1, orderBy: timestamp, orderDirection: asc) {
timestamp
}
}
poolAddresses
latestPoolSnapshot
}
registries(first: 5) {
id
}
}