Node.js hasOwnProperty does not work even when the property exists
In my Node.js Express application, when the user is logged in via passport the user user object is saved in the request.
It looks something like this:
{
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
}
But not every user has the ProviderUuid key present. So before using its value I am trying to check if the ProviderUuid key is present in the user object
var user = req.user;
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}
So doing user.hasOwnProperty('ProviderUuid') and Object.prototype.hasOwnProperty.call(user, "ProviderUuid")) returns false, however 'ProviderUuid' in user returns true.
What am I missing here?
javascript node.js hasownproperty
asked Nov 14 '18 at 4:59
codeinprogresscodeinprogress
53121127
add a comment |
In my Node.js Express application, when the user is logged in via passport the user user object is saved in the request.
It looks something like this:
{
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
}
But not every user has the ProviderUuid key present. So before using its value I am trying to check if the ProviderUuid key is present in the user object
var user = req.user;
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}
So doing user.hasOwnProperty('ProviderUuid') and Object.prototype.hasOwnProperty.call(user, "ProviderUuid")) returns false, however 'ProviderUuid' in user returns true.
What am I missing here?
javascript node.js hasownproperty
asked Nov 14 '18 at 4:59
codeinprogresscodeinprogress
53121127
Please check adripofjavascript.com/blog/drips/… may help you
– IftekharDani
Nov 14 '18 at 5:42
can you please check demo: repl.it/@idanimob/AquaGracefulMicrostation its return true.
– IftekharDani
Nov 14 '18 at 5:53
add a comment |
In my Node.js Express application, when the user is logged in via passport the user user object is saved in the request.
It looks something like this:
{
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
}
But not every user has the ProviderUuid key present. So before using its value I am trying to check if the ProviderUuid key is present in the user object
var user = req.user;
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}
So doing user.hasOwnProperty('ProviderUuid') and Object.prototype.hasOwnProperty.call(user, "ProviderUuid")) returns false, however 'ProviderUuid' in user returns true.
What am I missing here?
javascript node.js hasownproperty
asked Nov 14 '18 at 4:59
codeinprogresscodeinprogress
53121127
In my Node.js Express application, when the user is logged in via passport the user user object is saved in the request.
It looks something like this:
{
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
}
But not every user has the ProviderUuid key present. So before using its value I am trying to check if the ProviderUuid key is present in the user object
var user = req.user;
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}
So doing user.hasOwnProperty('ProviderUuid') and Object.prototype.hasOwnProperty.call(user, "ProviderUuid")) returns false, however 'ProviderUuid' in user returns true.
What am I missing here?
javascript node.js hasownproperty
javascript node.js hasownproperty
asked Nov 14 '18 at 4:59
codeinprogresscodeinprogress
53121127
asked Nov 14 '18 at 4:59
codeinprogresscodeinprogress
53121127
asked Nov 14 '18 at 4:59
codeinprogresscodeinprogress
53121127
asked Nov 14 '18 at 4:59
codeinprogresscodeinprogress
53121127
asked Nov 14 '18 at 4:59
codeinprogresscodeinprogress
53121127
53121127
Please check adripofjavascript.com/blog/drips/… may help you
– IftekharDani
Nov 14 '18 at 5:42
can you please check demo: repl.it/@idanimob/AquaGracefulMicrostation its return true.
– IftekharDani
Nov 14 '18 at 5:53
add a comment |
Please check adripofjavascript.com/blog/drips/… may help you
– IftekharDani
Nov 14 '18 at 5:42
can you please check demo: repl.it/@idanimob/AquaGracefulMicrostation its return true.
– IftekharDani
Nov 14 '18 at 5:53
Please check adripofjavascript.com/blog/drips/… may help you
– IftekharDani
Nov 14 '18 at 5:42
Please check adripofjavascript.com/blog/drips/… may help you
– IftekharDani
Nov 14 '18 at 5:42
can you please check demo: repl.it/@idanimob/AquaGracefulMicrostation its return true.
– IftekharDani
Nov 14 '18 at 5:53
can you please check demo: repl.it/@idanimob/AquaGracefulMicrostation its return true.
– IftekharDani
Nov 14 '18 at 5:53
add a comment |
2 Answers
2
active
oldest
votes
Since in works, the property must an inherited property, on one of user's prototype objects, rather than being on user itself. Here's a live example of such behavior:
const userProto = { foo: 'bar' };
// Create an empty object named `user` whose internal prototype is `userProto`:
const user = Object.create(userProto);
// False, user itself is an empty object, nothing's been assigned to it:
console.log(
user.hasOwnProperty('foo')
);
// True, `foo` does exist on the *internal prototype* of the `user` object:
console.log(
'foo' in user
);
// True, `foo` is a property directly on `userProto`:
console.log(
userProto.hasOwnProperty('foo')
);So, if you want to check for the existence of an inherited property named ProviderUuid, use the in operator like you're doing.
answered Nov 14 '18 at 5:04
CertainPerformanceCertainPerformance
83.2k144067
add a comment |
I tested code and all checks returned true.
var user = {
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
};
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}Try JSON.parse(), Maybe req.user saved as string
answered Nov 14 '18 at 5:17
afshinafshin
11
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Since in works, the property must an inherited property, on one of user's prototype objects, rather than being on user itself. Here's a live example of such behavior:
const userProto = { foo: 'bar' };
// Create an empty object named `user` whose internal prototype is `userProto`:
const user = Object.create(userProto);
// False, user itself is an empty object, nothing's been assigned to it:
console.log(
user.hasOwnProperty('foo')
);
// True, `foo` does exist on the *internal prototype* of the `user` object:
console.log(
'foo' in user
);
// True, `foo` is a property directly on `userProto`:
console.log(
userProto.hasOwnProperty('foo')
);So, if you want to check for the existence of an inherited property named ProviderUuid, use the in operator like you're doing.
answered Nov 14 '18 at 5:04
CertainPerformanceCertainPerformance
83.2k144067
add a comment |
Since in works, the property must an inherited property, on one of user's prototype objects, rather than being on user itself. Here's a live example of such behavior:
const userProto = { foo: 'bar' };
// Create an empty object named `user` whose internal prototype is `userProto`:
const user = Object.create(userProto);
// False, user itself is an empty object, nothing's been assigned to it:
console.log(
user.hasOwnProperty('foo')
);
// True, `foo` does exist on the *internal prototype* of the `user` object:
console.log(
'foo' in user
);
// True, `foo` is a property directly on `userProto`:
console.log(
userProto.hasOwnProperty('foo')
);So, if you want to check for the existence of an inherited property named ProviderUuid, use the in operator like you're doing.
answered Nov 14 '18 at 5:04
CertainPerformanceCertainPerformance
83.2k144067
add a comment |
Since in works, the property must an inherited property, on one of user's prototype objects, rather than being on user itself. Here's a live example of such behavior:
const userProto = { foo: 'bar' };
// Create an empty object named `user` whose internal prototype is `userProto`:
const user = Object.create(userProto);
// False, user itself is an empty object, nothing's been assigned to it:
console.log(
user.hasOwnProperty('foo')
);
// True, `foo` does exist on the *internal prototype* of the `user` object:
console.log(
'foo' in user
);
// True, `foo` is a property directly on `userProto`:
console.log(
userProto.hasOwnProperty('foo')
);So, if you want to check for the existence of an inherited property named ProviderUuid, use the in operator like you're doing.
answered Nov 14 '18 at 5:04
CertainPerformanceCertainPerformance
83.2k144067
Since in works, the property must an inherited property, on one of user's prototype objects, rather than being on user itself. Here's a live example of such behavior:
const userProto = { foo: 'bar' };
// Create an empty object named `user` whose internal prototype is `userProto`:
const user = Object.create(userProto);
// False, user itself is an empty object, nothing's been assigned to it:
console.log(
user.hasOwnProperty('foo')
);
// True, `foo` does exist on the *internal prototype* of the `user` object:
console.log(
'foo' in user
);
// True, `foo` is a property directly on `userProto`:
console.log(
userProto.hasOwnProperty('foo')
);So, if you want to check for the existence of an inherited property named ProviderUuid, use the in operator like you're doing.
const userProto = { foo: 'bar' };
// Create an empty object named `user` whose internal prototype is `userProto`:
const user = Object.create(userProto);
// False, user itself is an empty object, nothing's been assigned to it:
console.log(
user.hasOwnProperty('foo')
);
// True, `foo` does exist on the *internal prototype* of the `user` object:
console.log(
'foo' in user
);
// True, `foo` is a property directly on `userProto`:
console.log(
userProto.hasOwnProperty('foo')
);const userProto = { foo: 'bar' };
// Create an empty object named `user` whose internal prototype is `userProto`:
const user = Object.create(userProto);
// False, user itself is an empty object, nothing's been assigned to it:
console.log(
user.hasOwnProperty('foo')
);
// True, `foo` does exist on the *internal prototype* of the `user` object:
console.log(
'foo' in user
);
// True, `foo` is a property directly on `userProto`:
console.log(
userProto.hasOwnProperty('foo')
);answered Nov 14 '18 at 5:04
CertainPerformanceCertainPerformance
83.2k144067
answered Nov 14 '18 at 5:04
CertainPerformanceCertainPerformance
83.2k144067
answered Nov 14 '18 at 5:04
CertainPerformanceCertainPerformance
83.2k144067
answered Nov 14 '18 at 5:04
CertainPerformanceCertainPerformance
83.2k144067
83.2k144067
add a comment |
add a comment |
I tested code and all checks returned true.
var user = {
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
};
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}Try JSON.parse(), Maybe req.user saved as string
answered Nov 14 '18 at 5:17
afshinafshin
11
add a comment |
I tested code and all checks returned true.
var user = {
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
};
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}Try JSON.parse(), Maybe req.user saved as string
answered Nov 14 '18 at 5:17
afshinafshin
11
add a comment |
I tested code and all checks returned true.
var user = {
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
};
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}Try JSON.parse(), Maybe req.user saved as string
answered Nov 14 '18 at 5:17
afshinafshin
11
I tested code and all checks returned true.
var user = {
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
};
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}Try JSON.parse(), Maybe req.user saved as string
var user = {
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
};
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}var user = {
"uuid": "caa5cb58-ef92-4de5-a419-ef1478b05dad",
"first_name": "Sam",
"last_name": "Smith",
"email": "sam@email.com",
"password": "$2a$10$fXYBeoK6s.A8xo2Yfgx4feTLRXpdvaCykZxr7hErKaZDAVeplk.WG",
"profile_uuid": "db172902-f3c9-456d-8814-53d07d4ea954",
"isActive": true,
"deactivate": false,
"verified": true,
"ProviderUuid": "7149f8f1-0208-41db-a78e-887e7811a169"
};
console.log('---- provider: ' + JSON.stringify(user));
console.log('--- prop: ' + user.hasOwnProperty('ProviderUuid')); //returns false
console.log('---- other method prop check: ' + Object.prototype.hasOwnProperty.call(user, "ProviderUuid")); //returns false
if('ProviderUuid' in user){
//this returns true
}answered Nov 14 '18 at 5:17
afshinafshin
11
answered Nov 14 '18 at 5:17
afshinafshin
11
answered Nov 14 '18 at 5:17
afshinafshin
11
answered Nov 14 '18 at 5:17
afshinafshin
11
11
add a comment |
add a comment |
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Please check adripofjavascript.com/blog/drips/… may help you
– IftekharDani
Nov 14 '18 at 5:42
can you please check demo: repl.it/@idanimob/AquaGracefulMicrostation its return true.
– IftekharDani
Nov 14 '18 at 5:53