BUG #16000: PgAdmin 4.12 Internal Server Error

From: PG Bug reporting form <noreply(at)postgresql(dot)org>
To: pgsql-bugs(at)lists(dot)postgresql(dot)org
Cc: cees(dot)van(dot)zeeland(at)xs4all(dot)nl
Subject: BUG #16000: PgAdmin 4.12 Internal Server Error
Date: 2019-09-10 18:56:36
Message-ID: 16000-447b6969d2b2f559@postgresql.org
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Lists: pgsql-bugs

The following bug has been logged on the website:

Bug reference: 16000
Logged by: Cees van Zeeland
Email address: cees(dot)van(dot)zeeland(at)xs4all(dot)nl
PostgreSQL version: 11.5
Operating system: Windows 10


This seems to be a bug in PgAdmin 4.12

When I select any View and then click on the SQL tab I get a popup
“Internal Server Error”
With the message “can only concatenate str (not "NoneType") to str”

The View itself works fine.
Earlier versions of PgAdmin 4 did not show this error.

It might be related to Python?

I hope this message will reach the developers.

Thanks for any help,

Cees van Zeeland

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