JSON from URL in Table Column?

[musicbydannyd]

I have simple 2 column table with an ID and URL. Basic structure of URL parts are:

• Static start to URL (for example: https://examplesite.com/gethistory?id=)
• ID (same text as ID column)
• &format=json&token=
• API id

Pasting one of the URLs into web browser does show data formatted as JSON and I can view the record(s) when creating a new query using Json.Document(Web.Contents("url")).

What I'm HOPING to acomplish is convert URL column to list of JSON record(s) associated with each ID. I've tried various combinations of column transfomations (Json.Document, Web.Contents, List.Transform, etc.), but am getting the dreaded "Formula.Firewall" error.

I know it's doable, but apparently my brain is still in quarantine.

TIA, Danny

[V-lianl-msft · Accepted solution]

Hi @musicbydannyd ,

Define a variable and then invoke custom function.

M code may like this:

(id as number) as table=>
let
    Source = Table.FromRecords(Json.Document(Web.Contents("https://xxxxxxxx" &Number.ToText(id)&"xxxx"))[subjects])
in
    Source

Best Regards,
Liang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[SWiethorn]

Liang,

Please provide more context/explaination around your solution.
I'm not understanding your answer.

-S

[musicbydannyd]

@V-lianl-msft, unfortunately, I had to put this project on hold for a while. During my last attempt, I WAS able to successfully create a formula as you described, however was still getting the "Formula.Firewall" error when invoking. Thanks, Danny

[musicbydannyd]

@V-lianl-msft, I was afraid there might be a custom function involved for this rookie... appreciate the example! 😁

Let me do a little more research and I'll report back with a solution or more help.

Thanks again all!

DannyD

[lbendlin]

Obviously this depends on the format of the actual JSON behind the URLs but you should just be able to expand the records that are returned from each Json.Document(Web.Contents(JSON))

Maybe the column name JSON throws Power Query off?