IsRole

Not available in this language yet.
IsRole( value )
IsRole( value )
IsRole( value )
is_role( value )
IsRole( value )

Description

The IsRole function returns true only if value is a role, otherwise it returns false.

Parameters

Argument Type Definition and Requirements

value

Any

Any value, which is to be tested to determine whether it is a role or not.

Returns

Returns a boolean, indicating whether value was a role or not.

Examples

The following query uses Map to iterate over an array of all of the types of values that can be tested by a type-check function, passing each item into a Lambda function that returns an object, which contains the value and the result of calling IsRole with that value:

Not available in this language yet.
result, err := client.Query(
	f.Map(
		f.Arr{
			f.Arr{"array"},
			true,
			false,
			f.BytesV{0x01, 0x02, 0x03, 0x04},
			f.Arr{0x1, 0x2, 0x3, 0x4},
			f.Collection("Letters"),
			f.Ref("credentials/self"),
			f.Database("child_db"),
			f.Date("2019-11-12"),
			f.Ref(f.Collection("Letters"), 123),
			10.1,
			f.Function("double"),
			f.Index("letters"),
			10,
			f.Ref(f.Keys(), "1"),
			f.Query(f.Lambda("x", f.Var("x"))),
			nil,
			f.Null(),
			f.Obj{"x": 10},
			f.Role("employees"),
			f.Match(f.Index("letters")),
			"ten",
			"10",
			f.Time("2020-07-06T12:34:56.789Z"),
			f.Ref(f.Tokens(), "1"),
		},
		f.Lambda("x", f.Obj{
			"value": f.Var("x"),
			"IsRole": f.IsRole(f.Var("x")),
		})))

if err != nil {
	fmt.Fprintln(os.Stderr, err)
} else {
	fmt.Println(result)
}
[map[IsRole:false value:[array]] map[IsRole:false value:true] map[IsRole:false value:false] map[IsRole:false value:[1 2 3 4]] map[IsRole:false value:[1 2 3 4]] map[IsRole:false value:{Letters 0xc0001441e0 0xc0001441e0 <nil>}] map[IsRole:false value:{280481857410171392 0xc000144300 0xc000144300 <nil>}] map[IsRole:false value:{child_db 0xc000144420 0xc000144420 <nil>}] map[IsRole:false value:{0 63709113600 <nil>}] map[IsRole:false value:{123 0xc00008ff20 0xc00008ff20 <nil>}] map[IsRole:false value:10.1] map[IsRole:false value:{double 0xc000168090 0xc000168090 <nil>}] map[IsRole:false value:{letters 0xc0001681b0 0xc0001681b0 <nil>}] map[IsRole:false value:10] map[IsRole:false value:{1 0xc000168300 0xc000168300 <nil>}] map[IsRole:false value:{[123 34 97 112 105 95 118 101 114 115 105 111 110 34 58 34 51 34 44 34 108 97 109 98 100 97 34 58 34 120 34 44 34 101 120 112 114 34 58 123 34 118 97 114 34 58 34 120 34 125 125]}] map[IsRole:false value:{}] map[IsRole:false value:{}] map[IsRole:false value:map[x:10]] map[IsRole:true value:{employees 0xc000168510 0xc000168510 <nil>}] map[IsRole:false value:{map[match:{letters 0xc000168660 0xc000168660 <nil>}]}] map[IsRole:false value:ten] map[IsRole:false value:10] map[IsRole:false value:{789000000 63729635696 <nil>}] map[IsRole:false value:{1 0xc000168810 0xc000168810 <nil>}]]
System.out.println(
    client.query(
        Map(
            Arr(
                Arr(Value("array")),
                Value(true),
                Value(false),
                Value(new byte[] {0x1, 0x2, 0x3, 0x4}),
                Arr(Value(0x1), Value(0x2), Value(0x3), Value(0x4)),
                Collection("Letters"),
                Ref("credentials/self"),
                Database("child_db"),
                Date("2019-11-12"),
                Ref(Collection("Letters"), "123"),
                Value(10.1),
                Function("double"),
                Index("letters"),
                Value(10),
                Ref(Keys(), "1"),
                Query(Lambda("x", Var("x"))),
                Null(),
                Obj("x", Value(10)),
                Role("employees"),
                Match(Index("letters")),
                Value("ten"),
                Value("10"),
                Time("2020-07-06T12:34:56.789Z"),
                Ref(Tokens(), "1")
            ),
            Lambda(
                "x",
                Obj("value", Var("x"), "IsRole", IsRole(Var("x")))
            )
        )
    ).get());
[{value: ["array"], IsRole: false}, {value: true, IsRole: false}, {value: false, IsRole: false}, {value: [0x01 0x02 0x03 0x04], IsRole: false}, {value: [1, 2, 3, 4], IsRole: false}, {value: ref(id = "Letters", collection = ref(id = "collections")), IsRole: false}, {value: ref(id = "270607707725103616", collection = ref(id = "credentials")), IsRole: false}, {value: ref(id = "child_db", collection = ref(id = "databases")), IsRole: false}, {value: 2019-11-12, IsRole: false}, {value: ref(id = "123", collection = ref(id = "Letters", collection = ref(id = "collections"))), IsRole: false}, {value: 10.1, IsRole: false}, {value: ref(id = "double", collection = ref(id = "functions")), IsRole: false}, {value: ref(id = "letters", collection = ref(id = "indexes")), IsRole: false}, {value: 10, IsRole: false}, {value: ref(id = "1", collection = ref(id = "keys")), IsRole: false}, {value: QueryV({lambda=x, expr={var=x}}), IsRole: false}, {value: null, IsRole: false}, {value: {x: 10}, IsRole: false}, {value: ref(id = "employees", collection = ref(id = "roles")), IsRole: true}, {value: {@set = {match: ref(id = "letters", collection = ref(id = "indexes"))}}, IsRole: false}, {value: "ten", IsRole: false}, {value: "10", IsRole: false}, {value: 2020-07-06T12:34:56.789Z, IsRole: false}, {value: ref(id = "1", collection = ref(id = "tokens")), IsRole: false}]
client.query(
  q.Map(
    [
      ['array'],
      true,
      false,
      new Uint8Array([1, 2, 3, 4]),
      [0x1, 0x2, 0x3, 0x4],
      q.Collection('Letters'),
      q.Ref('credentials/self'),
      q.Database('child_db'),
      q.Date('2019-11-12'),
      q.Ref(q.Collection('Letters'), 123),
      10.1,
      q.Function('double'),
      q.Index('letters'),
      10,
      q.Ref(q.Keys(), '1'),
      q.Query(q.Lambda('x', q.Var('x'))),
      null,
      { x: 10 },
      q.Role('employees'),
      q.Match(q.Index('letters')),
      'ten',
      '10',
      q.Time('2020-07-06T12:34:56.789Z'),
      q.Ref(q.Tokens(), '1'),
    ],
    q.Lambda('x', {
      value: q.Var('x'),
      IsRole: q.IsRole(q.Var('x')),
    })
  )
)
.then((ret) => console.log(ret))
.catch((err) => console.error('Error: %s', err))
[
  { value: [ 'array' ], IsRole: false },
  { value: true, IsRole: false },
  { value: false, IsRole: false },
  { value: Bytes("AQIDBA=="), IsRole: false },
  { value: [ 1, 2, 3, 4 ], IsRole: false },
  { value: Collection("Letters"), IsRole: false },
  { value: Ref(Credentials(), "268435370002088448"), IsRole: false },
  { value: Database("child_db"), IsRole: false },
  { value: Date("2019-11-12"), IsRole: false },
  { value: Ref(Collection("Letters"), "123"), IsRole: false },
  { value: 10.1, IsRole: false },
  { value: Function("double"), IsRole: false },
  { value: Index("letters"), IsRole: false },
  { value: 10, IsRole: false },
  { value: Ref(Keys(), "1"), IsRole: false },
  { value: Query(Lambda("x", Var("x"))), IsRole: false },
  { value: null, IsRole: false },
  { value: { x: 10 }, IsRole: false },
  { value: Role("employees"), IsRole: true },
  { value: Match(Index("letters")), IsRole: false },
  { value: 'ten', IsRole: false },
  { value: '10', IsRole: false },
  { value: Time("2020-06-15T22:06:09.061Z"), IsRole: false },
  { value: Ref(Tokens(), "1"), IsRole: false }
]
result = client.query(
  q.map_(
    q.lambda_("x", {
      "value": q.var("x"),
      "IsRole": q.is_role(q.var("x")),
    }),
    [
      ["array"],
      True,
      False,
      bytearray([1, 2, 3, 4]),
      [0x1, 0x2, 0x3, 0x4],
      q.collection("Letters"),
      q.ref("credentials/self"),
      q.database("child_db"),
      q.date("2019-11-12"),
      q.ref(q.collection("Letters"), 123),
      10.1,
      q.function("double"),
      q.index("letters"),
      10,
      q.ref(q.keys(), "1"),
      q.query(q.lambda_("x", q.var("x"))),
      None,
      {"x": 10},
      q.role("employees"),
      q.match(q.index("letters")),
      "ten",
      "10",
      q.time("2020-07-06T12:34:56.789Z"),
      q.ref(q.tokens(), "1"),
    ],
  )
)
print(result)
[{'value': ['array'], 'IsRole': False}, {'value': True, 'IsRole': False}, {'value': False, 'IsRole': False}, {'value': bytearray(b'\x01\x02\x03\x04'), 'IsRole': False}, {'value': [1, 2, 3, 4], 'IsRole': False}, {'value': Ref(id=Letters, collection=Ref(id=collections)), 'IsRole': False}, {'value': Ref(id=282032258185953792, collection=Ref(id=credentials)), 'IsRole': False}, {'value': Ref(id=child_db, collection=Ref(id=databases)), 'IsRole': False}, {'value': datetime.date(2019, 11, 12), 'IsRole': False}, {'value': Ref(id=123, collection=Ref(id=Letters, collection=Ref(id=collections))), 'IsRole': False}, {'value': 10.1, 'IsRole': False}, {'value': Ref(id=double, collection=Ref(id=functions)), 'IsRole': False}, {'value': Ref(id=letters, collection=Ref(id=indexes)), 'IsRole': False}, {'value': 10, 'IsRole': False}, {'value': Ref(id=1, collection=Ref(id=keys)), 'IsRole': False}, {'value': Query({'api_version': '3', 'lambda': 'x', 'expr': {'var': 'x'}}), 'IsRole': False}, {'value': None, 'IsRole': False}, {'value': {'x': 10}, 'IsRole': False}, {'value': Ref(id=employees, collection=Ref(id=roles)), 'IsRole': True}, {'value': SetRef({'match': Ref(id=letters, collection=Ref(id=indexes))}), 'IsRole': False}, {'value': 'ten', 'IsRole': False}, {'value': '10', 'IsRole': False}, {'value': FaunaTime('2020-07-06T12:34:56.789Z'), 'IsRole': False}, {'value': Ref(id=1, collection=Ref(id=tokens)), 'IsRole': False}]
println(Await.result(
  client.query(
    Map(
      Arr(
        Arr("array"),
        true,
        false,
        BytesV(0x1, 0x2, 0x3, 0x4),
        Arr(0x1, 0x2, 0x3, 0x4),
        Collection("Letters"),
        Ref("credentials/self"),
        Database("child_db"),
        Date("2019-11-12"),
        Ref(Collection("Letters"), 123),
        10.1,
        Function("double"),
        Index("letters"),
        10,
        Ref(Keys(), "1"),
        Query(Lambda("x", Var("x"))),
        Null,
        Obj("x" -> 10),
        Role("employees"),
        Match(Index("letters")),
        "ten",
        "10",
        Time("2020-07-06T12:34:56.789Z"),
        Ref(Tokens(), "1")
      ),
      Lambda(
        "x",
        Obj( "value" -> Var("x"), "IsRole" -> IsRole(Var("x")))
      )
    )
  ),
  5.seconds
))
[{value: ["array"], IsRole: false}, {value: true, IsRole: false}, {value: false, IsRole: false}, {value: [0x01 0x02 0x03 0x04], IsRole: false}, {value: [1, 2, 3, 4], IsRole: false}, {value: ref(id = "Letters", collection = ref(id = "collections")), IsRole: false}, {value: ref(id = "270972905842541056", collection = ref(id = "credentials")), IsRole: false}, {value: ref(id = "child_db", collection = ref(id = "databases")), IsRole: false}, {value: 2019-11-12, IsRole: false}, {value: ref(id = "123", collection = ref(id = "Letters", collection = ref(id = "collections"))), IsRole: false}, {value: 10.1, IsRole: false}, {value: ref(id = "double", collection = ref(id = "functions")), IsRole: false}, {value: ref(id = "letters", collection = ref(id = "indexes")), IsRole: false}, {value: 10, IsRole: false}, {value: ref(id = "1", collection = ref(id = "keys")), IsRole: false}, {value: {api_version: "3", lambda: "x", expr: {var: "x"}}, IsRole: false}, {value: NullV, IsRole: false}, {value: {x: 10}, IsRole: false}, {value: ref(id = "employees", collection = ref(id = "roles")), IsRole: true}, {value: {@set = {match: ref(id = "letters", collection = ref(id = "indexes"))}}, IsRole: false}, {value: "ten", IsRole: false}, {value: "10", IsRole: false}, {value: 2020-07-06T12:34:56.789Z, IsRole: false}, {value: ref(id = "1", collection = ref(id = "tokens")), IsRole: false}]

This query operates on a pre-existing schema, which is not provided here.

Also, the query is executed via a client connection, that uses a secret acquired by calling Login (not shown here), so that Ref("credentials/self") returns a valid value.

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