# Check your firebase entries, some characters are not allowed in the keyfield

**URL:** <https://community.thunkable.com/t/check-your-firebase-entries-some-characters-are-not-allowed-in-the-keyfield/185192>\
**Category:** Questions about Thunkable X\
**Tags:** firebase\
**Created:** [August 17, 2019, 4:49pm UTC](https://community.thunkable.com/t/check-your-firebase-entries-some-characters-are-not-allowed-in-the-keyfield/185192 "2019-08-17T16:49:59Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![maxb](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/maxb/32/35200_2.png) [@maxb](https://community.thunkable.com/u/maxb)\
**Post date:** [August 17, 2019, 4:49pm UTC](https://community.thunkable.com/t/check-your-firebase-entries-some-characters-are-not-allowed-in-the-keyfield/185192/1 "2019-08-17T16:49:59Z")

</div>

Ok so,  
my app is fairly complicate at this point, but it works, on iPhone.  
And it doesn’t on Android.

Here, the last step.  
Why? No clue.  
@Mark I think this is something for your knowledge.  
The problem seems to be in that username result, which is just a join from 2 text inputs.

Everything works, on android, until that last step, that it doesn’t compute.

![errore%20android](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/9/4/947599570c0ce419f69457076e6b2d50372015a1.png)

At some point I have to save some values to firebase, and iPhone does it perfectly, Android does it partially.

FIrebase rules are completely open to esclude other reasons.

Anybody any clue?

---

<div class="post-metadata">

**Author:** ![Mark](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/mark/32/18133_2.png) [@Mark](https://community.thunkable.com/u/Mark)\
**Post date:** [August 23, 2019, 11:41pm UTC](https://community.thunkable.com/t/check-your-firebase-entries-some-characters-are-not-allowed-in-the-keyfield/185192/2 "2019-08-23T23:41:51Z")

</div>

Max,

That’s pretty strange. Any chance you can create a really simple app which demonstrates the problem?

-Mark

---

<div class="post-metadata">

**Author:** ![maxb](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/maxb/32/35200_2.png) [@maxb](https://community.thunkable.com/u/maxb)\
**Post date:** [August 25, 2019, 12:49pm UTC](https://community.thunkable.com/t/check-your-firebase-entries-some-characters-are-not-allowed-in-the-keyfield/185192/3 "2019-08-25T12:49:37Z")

</div>

Ok soo, the problem was that in the name I was saving there was a “.”, a point.

And firebase doesn’t accept it in the key.

I tried to use the realt time db block to have an error reportbut it didn’t work, dunno why.

So it’s solved the mistery, thanks Mark.

---

<div class="post-metadata">

**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\
**Post date:** [November 8, 2024, 12:11pm UTC](https://community.thunkable.com/t/check-your-firebase-entries-some-characters-are-not-allowed-in-the-keyfield/185192/4 "2024-11-08T12:11:46Z")

</div>