I greet you all nairalanders.....

Please am working on a small complex project and I just got stuck in this problem since last week....

This is the problem am facing....

I want to generate a 12 base( 12 digits) random number that will be mailed to the user after registration, which will be his or her profile unique ID number..

Lemme explain it better...

For example, you signed up with us, the after registration will give u a unique ID number for login in to your account...

Now the problem is, the Math.random() function will sometimes generates exatexa the same number it has generated before
Now am looking for mathod that check if the the id number already exists, if I dose not exists generate another number but if it exists, ignore the ID number and generate another one .

That is the problem am facing because each user will have a unique ID number.

This is the codes I used to do it, but I doesn't work as expected..


// Please am using both ES5 and ES6

const user_id_generator = (
var IDs, id_dataDB, id_numb_limit;
IDs = [];

// base 12 id number
id_numb_limit = 999999999999;

//Generating random number
let generator =
Math.floor(Math.random(id_numb_limit)+1 );

// to add the random number to the IDs
IDs.push(generator);

function check_ID_number(){
//Old school for loop
for (var count = 0; count < IDs.length;
count++){
var create_new_id_number;
if (generator !== IDs[count]){
IDs.push(generator)

} else if (generator === IDs[count]{
create_new_id_number =
generator;
IDs.push(create_new_id_number)
}}
}
check_ID_number();
)();


This is just for the ID generator, but is not working as expected...

Please if you have any idea on how to solve this problem, please your comment is highly needed..

Or you can just inbox me via WhatsApp...
09037099739

K

U can generate the unique numbers from your database depending on the database u are using..

MsSql - identity field. (Once you insert the record, u can retrieve the unique number and padd it with something to form the id u need to use )

Oracle - generate a sequence and use the unique value to do whatever u need to do


I advice u also reconsider generating random Numbers as their login. The problem with your approach is that if u use an independent random generator from js like u try to do, when your user base grows, the likely hood of repeat will still be there no matter au awesome the random number generator is.

Let them choose something they can remember, validate it against your existing users to make sure it does not exist and allow them use it during registration.

Email, mobile numbers are also unique stuffs u can allow your users to use as their login details. You will store the information with unique constraints in your database so that even if client validation fail u, the database will not allow such duplicates.


I hope this helps.

A quick glance through your code.... I noticed your random number GEN

//Generating random number
let generator =
Math.floor(Math.random(id_numb_limit)+1 );

Will always return 1.



TRY THIS

let generator = Math.floor (Math.random () * id_numb_limit + 1);

If you were using nodejs you could just use the random string dependency

AntiWailer:
U can generate the unique numbers from your database depending on the database u are using..

MsSql - identity field. (Once you insert the record, u can retrieve the unique number and padd it with something to form the id u need to use )

Oracle - generate a sequence and use the unique value to do whatever u need to do


I advice u also reconsider generating random Numbers as their login. The problem with your approach is that if u use an independent random generator from js like u try to do, when your user base grows, the likely hood of repeat will still be there no matter au awesome the random number generator is.

Let them choose something they can remember, validate it against your existing users to make sure it does not exist and allow them use it during registration.

Email, mobile numbers are also unique stuffs u can allow your users to use as their login details. You will store the information with unique constraints in your database so that even if client validation fail u, the database will not allow such duplicates.


I hope this helps.

Thank you very much bro,
Lemme try that .. I acpreappre.

niel63:
A quick glance through your code.... I noticed your random number GEN

//Generating random number
let generator =
Math.floor(Math.random(id_numb_limit)+1 );

Will always return 1.



TRY THIS

let generator = Math.floor (Math.random () * id_numb_limit + 1);

My brother that was typical error abeg...
Na just wen ah do fast to post am ...
No reason am I just went through it now
But thanks anyway for your correction...

if you are using node.js use the module called "uuid" to generate unique id and save it to the database when the user submit registration i hope that helps

Why are you using JavaScript for something like this? Stuff like this should be done on the server side! unless you're using nodejs. JavaScript can be easily tampered with.

Deicide:
Why are you using JavaScript for something like this? Stuff like this should be done on the server side! unless you're using nodejs. JavaScript can be easily tampered with.

I concur.

Just enter your user's data directly into the database and auto generate each user's id.

[quote Why are you using JavaScript for something like this? Stuff like this should be done on the server side! [/quote]
bros i understand, no be only wey ah dey use, i de use ajax,json & webpack modules d truth is dat ah won use 1 stone to kill 2 birds

Karleb:


I concur.

Just enter your user's data directly into the database and generate each user's id.

bros SQL no fee generate unique id,
d thing be say, ah just de avoide PHP, thats y ah de use main JS nd node.js

Venzee:

bros SQL no fee generate unique id,
d thing be say, ah just de avoide PHP, thats y ah de use main JS nd node.js

Actually SQL has an auto increment keyword that can automatically generate a unique id for any record entered.

You don't need php to use sql, you could use sql with node.js.

The issue is not your code, cos your code will not help you here...your approach is the issue.

If you need a unique number for this, use MySQL as suggested but let me add this.

I believe each user will have an id, That is enough a unique number, if you can think deep you can always make it any length of digit you want.

Also if you can also create a column say uid and by the time you want to first register a user give the uid value of the least digit you want. Eg

Say you need 10digit
1000000000

Then the next user registering get
1000000001

The problem with this approach is that your users can assume others member ID.

Another way to do it is to use your backend language apart from JS to get the unique I'd but be sure that if you will always check the value for uniqueness each time a user signed it then you will experience slow site load as your user get bigger.

My best advice is you stick to the few unique data at hand..like email, id, timestamp of registration.

Have learnt never to make things complex for myself when it comes to programming.

Install uuid from npm and save urself the stress

Use uuid for generating unique IDs if u have problem use google and YouTube, most people here are PHP guys

Talking from django aspect, this will be done in the database, or follow uuid as aspect as that will save you time. This can't really be done on the client side rather the server side.

WHY YOUR CODE DON'T SEEM TO WORK:

First, your loop will not even run, as its condition will always return false because your array length is 0. for(count = 0; ARRAY LENGTH = 0)

Secondly, for you to be able to store whatever ids you generate and compare to subsequent once, you will need to first store them in a Persistent storage or state management.

If you want to do this in the client side, you can use your localstorage or some state management - e.g Redux

Venzee:
I greet you all nairalanders.....

Please am working on a small complex project and I just got stuck in this problem since last week....

This is the problem am facing....

I want to generate a 12 base( 12 digits) random number that will be mailed to the user after registration, which will be his or her profile unique ID number..

Lemme explain it better...

For example, you signed up with us, the after registration will give u a unique ID number for login in to your account...

Now the problem is, the Math.random() function will sometimes generates exatexa the same number it has generated before
Now am looking for mathod that check if the the id number already exists, if I dose not exists generate another number but if it exists, ignore the ID number and generate another one .

That is the problem am facing because each user will have a unique ID number.

This is the codes I used to do it, but I doesn't work as expected..


// Please am using both ES5 and ES6

const user_id_generator = (
var IDs, id_dataDB, id_numb_limit;
IDs = [];

// base 12 id number
id_numb_limit = 999999999999;

//Generating random number
let generator =
Math.floor(Math.random(id_numb_limit)+1 );

// to add the random number to the IDs
IDs.push(generator);

function check_ID_number(){
//Old school for loop
for (var count = 0; count < IDs.length;
count++){
var create_new_id_number;
if (generator !== IDs[count]){
IDs.push(generator)

} else if (generator === IDs[count]{
create_new_id_number =
generator;
IDs.push(create_new_id_number)
}}
}
check_ID_number();
)();


This is just for the ID generator, but is not working as expected...

Please if you have any idea on how to solve this problem, please your comment is highly needed..

Or you can just inbox me via WhatsApp...
09037099739

Taofeekdboy:
Talking from django aspect, this will be done in the database, or follow uuid as aspect as that will save you time. This can't really be done on the client side rather the server side.

Abi..! Bros...
You don abeg

Yupng:
WHY YOUR CODE DON'T SEEM TO WORK:

First, your loop will not even run, as its condition will always return false because your array length is 0. for(count = 0; ARRAY LENGTH = 0)

Secondly, for you to be able to store whatever ids you generate and compare to subsequent once, you will need to first store them in a Persistent storage or state management.

If you want to do this in the client side, you can use your localstorage or some state management - e.g Redux

Bros thank you abeg
Make I go try the localStorage and store the IDs there..
You don try abeg..

What if I use cookies to store the IDs directly to the user's machine?..

Venzee:


Bros thank you abeg
Make I go try the localStorage and store the IDs there..
You don try abeg..

What if I use cookies to store the IDs directly to the user's machine?..

Lol!

If there is a server side for you app, sure use cookies. I suggest LS because I thought your app was solely client side based.

Venzee:


Bros thank you abeg
Make I go try the localStorage and store the IDs there..
You don try abeg..

What if I use cookies to store the IDs directly to the user's machine?..