Mixing
Javascript + Firebase blog addpost function firstId returns undefined
I am creating a blog with Js and Firebase. When I add the posts to the firebase database the first one's Id is undefined then in starts increasing from myid-0.
Here is my code:
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId(uniqueId))">Add</button>
...........
function uniqueId(uniqueId) {
var counter = 0;
window.uniqueId = function(){
return ('myid-' + counter++);
}
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
Why is it not starting to add the post from myid-0?
javascript firebase firebase-realtime-database
edited Nov 22 '18 at 0:41
Frank van Puffelen
237k29382408
asked Nov 21 '18 at 23:32
Gabriella CsernusGabriella Csernus
5210
add a comment |
I am creating a blog with Js and Firebase. When I add the posts to the firebase database the first one's Id is undefined then in starts increasing from myid-0.
Here is my code:
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId(uniqueId))">Add</button>
...........
function uniqueId(uniqueId) {
var counter = 0;
window.uniqueId = function(){
return ('myid-' + counter++);
}
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
Why is it not starting to add the post from myid-0?
javascript firebase firebase-realtime-database
edited Nov 22 '18 at 0:41
Frank van Puffelen
237k29382408
asked Nov 21 '18 at 23:32
Gabriella CsernusGabriella Csernus
5210
add a comment |
I am creating a blog with Js and Firebase. When I add the posts to the firebase database the first one's Id is undefined then in starts increasing from myid-0.
Here is my code:
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId(uniqueId))">Add</button>
...........
function uniqueId(uniqueId) {
var counter = 0;
window.uniqueId = function(){
return ('myid-' + counter++);
}
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
Why is it not starting to add the post from myid-0?
javascript firebase firebase-realtime-database
edited Nov 22 '18 at 0:41
Frank van Puffelen
237k29382408
asked Nov 21 '18 at 23:32
Gabriella CsernusGabriella Csernus
5210
I am creating a blog with Js and Firebase. When I add the posts to the firebase database the first one's Id is undefined then in starts increasing from myid-0.
Here is my code:
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId(uniqueId))">Add</button>
...........
function uniqueId(uniqueId) {
var counter = 0;
window.uniqueId = function(){
return ('myid-' + counter++);
}
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
Why is it not starting to add the post from myid-0?
javascript firebase firebase-realtime-database
javascript firebase firebase-realtime-database
edited Nov 22 '18 at 0:41
Frank van Puffelen
237k29382408
asked Nov 21 '18 at 23:32
Gabriella CsernusGabriella Csernus
5210
edited Nov 22 '18 at 0:41
Frank van Puffelen
237k29382408
asked Nov 21 '18 at 23:32
Gabriella CsernusGabriella Csernus
5210
edited Nov 22 '18 at 0:41
Frank van Puffelen
237k29382408
edited Nov 22 '18 at 0:41
Frank van Puffelen
237k29382408
edited Nov 22 '18 at 0:41
Frank van Puffelen
237k29382408
237k29382408
asked Nov 21 '18 at 23:32
Gabriella CsernusGabriella Csernus
5210
asked Nov 21 '18 at 23:32
Gabriella CsernusGabriella Csernus
5210
asked Nov 21 '18 at 23:32
Gabriella CsernusGabriella Csernus
5210
5210
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
This is because your function uniqueId() is not correct. You can see it by having a button in your page with the following code:
<input
id="clickMe"
type="button"
value="clickme"
onclick="console.log(uniqueId());"
/>
So if you change your function to something like the following it will work:
var counter = 0;
function uniqueId() {
return 'myid-' + counter++;
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
......
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId())">Add</button>
Note however that you can let Firebase generating the UniqueIds, see https://firebase.google.com/docs/reference/js/firebase.database.Reference#push
answered Nov 22 '18 at 8:19
Renaud TarnecRenaud Tarnec
11.6k21531
It works! Thanks a lot!
– Gabriella Csernus
Nov 22 '18 at 10:26
1
You are welcome. Note that you can let Firebase generating the Unique Ids, see firebase.google.com/docs/reference/js/…
– Renaud Tarnec
Nov 22 '18 at 10:45
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
This is because your function uniqueId() is not correct. You can see it by having a button in your page with the following code:
<input
id="clickMe"
type="button"
value="clickme"
onclick="console.log(uniqueId());"
/>
So if you change your function to something like the following it will work:
var counter = 0;
function uniqueId() {
return 'myid-' + counter++;
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
......
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId())">Add</button>
Note however that you can let Firebase generating the UniqueIds, see https://firebase.google.com/docs/reference/js/firebase.database.Reference#push
answered Nov 22 '18 at 8:19
Renaud TarnecRenaud Tarnec
11.6k21531
It works! Thanks a lot!
– Gabriella Csernus
Nov 22 '18 at 10:26
1
You are welcome. Note that you can let Firebase generating the Unique Ids, see firebase.google.com/docs/reference/js/…
– Renaud Tarnec
Nov 22 '18 at 10:45
add a comment |
This is because your function uniqueId() is not correct. You can see it by having a button in your page with the following code:
<input
id="clickMe"
type="button"
value="clickme"
onclick="console.log(uniqueId());"
/>
So if you change your function to something like the following it will work:
var counter = 0;
function uniqueId() {
return 'myid-' + counter++;
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
......
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId())">Add</button>
Note however that you can let Firebase generating the UniqueIds, see https://firebase.google.com/docs/reference/js/firebase.database.Reference#push
answered Nov 22 '18 at 8:19
Renaud TarnecRenaud Tarnec
11.6k21531
It works! Thanks a lot!
– Gabriella Csernus
Nov 22 '18 at 10:26
1
You are welcome. Note that you can let Firebase generating the Unique Ids, see firebase.google.com/docs/reference/js/…
– Renaud Tarnec
Nov 22 '18 at 10:45
add a comment |
This is because your function uniqueId() is not correct. You can see it by having a button in your page with the following code:
<input
id="clickMe"
type="button"
value="clickme"
onclick="console.log(uniqueId());"
/>
So if you change your function to something like the following it will work:
var counter = 0;
function uniqueId() {
return 'myid-' + counter++;
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
......
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId())">Add</button>
Note however that you can let Firebase generating the UniqueIds, see https://firebase.google.com/docs/reference/js/firebase.database.Reference#push
answered Nov 22 '18 at 8:19
Renaud TarnecRenaud Tarnec
11.6k21531
This is because your function uniqueId() is not correct. You can see it by having a button in your page with the following code:
<input
id="clickMe"
type="button"
value="clickme"
onclick="console.log(uniqueId());"
/>
So if you change your function to something like the following it will work:
var counter = 0;
function uniqueId() {
return 'myid-' + counter++;
}
function writeUserData(title, content, postID) {
firebase.database().ref('posts/' + postID).set({
title: title,
content: content
});
}
......
<button onclick="writeUserData(document.getElementById('blog-title').value, document.getElementById('blog-content').value, uniqueId())">Add</button>
Note however that you can let Firebase generating the UniqueIds, see https://firebase.google.com/docs/reference/js/firebase.database.Reference#push
answered Nov 22 '18 at 8:19
Renaud TarnecRenaud Tarnec
11.6k21531
edited Nov 22 '18 at 10:56
answered Nov 22 '18 at 8:19
Renaud TarnecRenaud Tarnec
11.6k21531
answered Nov 22 '18 at 8:19
Renaud TarnecRenaud Tarnec
11.6k21531
answered Nov 22 '18 at 8:19
Renaud TarnecRenaud Tarnec
11.6k21531
11.6k21531
It works! Thanks a lot!
– Gabriella Csernus
Nov 22 '18 at 10:26
1
You are welcome. Note that you can let Firebase generating the Unique Ids, see firebase.google.com/docs/reference/js/…
– Renaud Tarnec
Nov 22 '18 at 10:45
add a comment |
It works! Thanks a lot!
– Gabriella Csernus
Nov 22 '18 at 10:26
1
You are welcome. Note that you can let Firebase generating the Unique Ids, see firebase.google.com/docs/reference/js/…
– Renaud Tarnec
Nov 22 '18 at 10:45
It works! Thanks a lot!
– Gabriella Csernus
Nov 22 '18 at 10:26
It works! Thanks a lot!
– Gabriella Csernus
Nov 22 '18 at 10:26
1
1
You are welcome. Note that you can let Firebase generating the Unique Ids, see firebase.google.com/docs/reference/js/…
– Renaud Tarnec
Nov 22 '18 at 10:45
You are welcome. Note that you can let Firebase generating the Unique Ids, see firebase.google.com/docs/reference/js/…
– Renaud Tarnec
Nov 22 '18 at 10:45
add a comment |
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