`Credential.firstWhere()`

Get the first matching accessible Credential.

Signature

Credential.firstWhere(pred: (Credential => Boolean)) => Credential | NullCredential

Each identity in a Fauna database has a Credential document. This method returns the first accessible document that matches the predicate function.

Parameter Type Required Description

Parameter	Type	Required	Description
pred	Function	Yes	An anonymous function that compares values in each `Credential` document and returns `true` for matches or `false` for mismatches.

pred

Yes

An anonymous function that compares values in each Credential document and returns true for matches or false for mismatches.

Parameter Type Required Description

Parameter	Type	Required	Description
val	Credential		Credential document to compare. If omitted, use dot notation to access `Credential` properties.

val

Credential document to compare. If omitted, use dot notation to access Credential properties.

One of:

Type	Description
Credential	First accessible document matching the predicate function.
NullCredential	When no matches are found to the predicate function or all matching documents are inaccessible. See NullDoc.

Type

Description

First accessible document matching the predicate function.

When no matches are found to the predicate function or all matching documents are inaccessible. See NullDoc.

Credential.firstWhere(.document == Customer.byId("111"))

{
  id: "371153420791316514",
  coll: Credential,
  ts: Time("2099-07-24T17:05:34.890Z"),
  document: Customer("111")
}

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