FQL v4 will be decommissioned on June 30, 2025. Ensure that you complete your migration from FQL v4 to FQL v10 by that date.

Fauna accounts created after August 21, 2024 must use FQL v10. These accounts will not be able to run FQL v4 queries or access the v4 Dashboard.

For more details, see the v4 EOL announcement and migration guide. Contact support@fauna.com with any questions.

Call a function

Creating and updating a function requires:

An admin or server key. See Keys and Permissions for details.
The privilege to create/update a function, granted in an Attribute-based access control (ABAC) role.

Problem

You need to execute a function within the current database.

Solution

Use the Call function:

client.query(
  q.Call(
    q.Function('create_post'),
    [ 'First Post Title', 'This is my first blog post!' ],
  )
)
.then((ret) => console.log(ret))
.catch((err) => console.error(
  'Error: [%s] %s: %s',
  err.name,
  err.message,
  err.errors()[0].description,
))

{
  ref: Ref(Collection("posts"), "300221794335326720"),
  ts: 1622572664480000,
  data: { title: 'First Post Title', body: 'This is my first blog post!' }
}

result = client.query(
  q.call(
    q.function("create_post"),
    ["First Post Title", "This is my first blog post!"]
  )
)
print(result)

{'ref': Ref(id=300221798539067904, collection=Ref(id=posts, collection=Ref(id=collections))), 'ts': 1622572668490000, 'data': {'title': 'First Post Title', 'body': 'This is my first blog post!'}}

result, err := client.Query(
	f.Call(
		f.Function("create_post"),
		f.Arr{"First Post Title", "This is my first blog post!"},
	))

if err != nil {
	fmt.Fprintln(os.Stderr, err)
} else {
	fmt.Println(result)
}

map[data:map[body:This is my first blog post! title:First Post Title] ref:{300221752288477696 0xc00009b8f0 0xc00009b8f0 <nil>} ts:1622572624380000]

try
{
    Value result = await client.Query(
        Call(
            Function("create_post"),
            Arr("First Post Title", "This is my first blog post!")
        )
    );
    Console.WriteLine(result);
}
catch (Exception e)
{
    Console.WriteLine($"ERROR: {e.Message}");
}

ObjectV(ref: RefV(id = "300221738176741888", collection = RefV(id = "posts", collection = RefV(id = "collections"))),ts: LongV(1622572610930000),data: ObjectV(title: StringV(First Post Title),body: StringV(This is my first blog post!)))

System.out.println(
    client.query(
        Call(
            Function("create_post"),
            Arr(
                Value("First Post Title"),
                Value("this is my first blog post!")
            )
        )
    ).get());

{ref: ref(id = "300221779190743552", collection = ref(id = "posts", collection = ref(id = "collections"))), ts: 1622572650040000, data: {title: "First Post Title", body: "this is my first blog post!"}}

Call(
  Function('create_post'),
  [ 'First Post Title', 'This is my first blog post!' ],
)

{
  ref: Ref(Collection("posts"), "302044131605086720"),
  ts: 1624310580730000,
  data: { title: 'First Post Title', body: 'This is my first blog post!' }
}

Query metrics:

bytesIn: 98
bytesOut: 232
computeOps: 1
readOps: 0
writeOps: 1
readBytes: 0
writeBytes: 250
queryTime: 21ms
retries: 0

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