Where is my write out file?

[mch8418]

I wrote out a file in my app, no error reported, but where is my file?

[david.wylie]

Not sure, but you can read / write to
/tmp

so in your example swap out “order.txt” for “/tmp/order.txt”

I do it quite a lot, but bear in mind that any data written is not guaranteed to still be there after the server call terminates. It might still be there, but no promises.

[mch8418]

you mean in my local laptop /tmp?

[david.wylie]

No.
Anvil gives you access to your own ring fenced /tmp on their servers.

Here’s a thread discussing it :

Google Drive And LOAD DATA INFILE

Hi David, You’re quite right, the MySQL client library requires a real local filename, and the Google Drive file is not local. Thankfully, that’s easy to fix. Just write the contents of that Google Drive file into a local file, then use that: import random, os # Generate a temporary random local file name tmp_name = "/tmp/%s" % "".join([random.choice("0123456789abcdef") for x in range(32)]) # Read the Google Drive file into the temporary local file with open(tmp_name, 'wb') as f: f.write(a…

[mch8418]

could you please show me where is my own ring fenced /tmp with picture?

[david.wylie]

You just use it.

So instead of :

file = open('order.txt','w')

you write :

file = open('/tmp/order.txt','w')

Nothing to show really.

It’s possible that if you omit the “/tmp” that it writes there anyway. You could test that by trying to open it again and read it.

[mch8418]

Interesting, it works. But we don’t know where it is. Is there anyway to enlarge the frame of alert? to make it looks neat a bit

[david.wylie]

@mch8418

Interesting, it works. But we don’t know where it is.

If you mean the file, it’s on the Anvil server in an isolated virtual “/tmp” directory. Exactly where it is is not really important.

@mch8418

Is there anyway to enlarge the frame of alert? to make it looks neat a bit

You could create a form containing a textarea control, and use that form as the content area of the alert box. For example :

from myAlertForm import myAlertForm
...
f = myAlertForm()
f.text_area.text = myfileoutput
alert(f)

which assumes you have a textarea control (called “text_area”) on a form called myAlertForm. Now at least you can scroll down the textarea.

You could also make the form capable of parsing the text into a data grid for example. So you could create an array of dicts and pass that to the items property of a datagrid or repeating panel.

If you’re going to be displaying a lot of data in a pop up form in an alert window, set the “large” property to True to let it take up more space on the screen ( Anvil | Reference)