[Solved] Dataviewer going blank (TypeError: Cannot read property 'toString' of null)

Thunkable Discuss
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#1

I have this screen with a dataviewer that goes blank when the screen opens.

The data transfering over fine to the Airtable(Homework Helpers - Confirmed):
image

I think I might be running into an issue when i create a row in the local DB (Students Helping)

In the console i get this error:

TypeError: Cannot read property 'toString' of null,

The data viewer only shows a line of text,
image
(it originally showing and image, but i removed that, thinking that was the problem, but not luck)

Any other ideas to what might be causing me issues? Thank you in advance!

#2

Does your Students Helping data source get updated when you run the first “create row” block? Is it also in Airtable?

Have you checked the values of those three stored variables right before running that block? For example, by assigning them to a label and displaying their values?

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#3

Thanks for the help @tatiang! To answer your question, the first data source is a local DB.

I checked the values of the three stored variables, they were:

image
image1161Ă—210 12.4 KB

Yellow = Student name
Pink = Student Code
Blue = Profile picture source

But I ended up clearing the local DB and it works fine now! Turns out I had some past stored data in the DB that was formatted incorrectly :sweat_smile:

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#4

Glad to hear you got it sorted out!

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