Hi all I am trying to register a custom block to prefect clo

Question

Hi all I am trying to register a custom block to prefect cloud via the cli tool and seeing `Successfully registered 0 blocks` I have confirmed the file being registed is the intended python script And worked up a minimal example that results in the same outcome If i just do ```class SampleBlock Block test str``` It still fails to register Please help

Bianca Hoch · Answer

Hey Matthew can you share what the cli command is looking like

Bianca Hoch · Answer

something like this `$ prefect block register file my block py`

Matthew Scanlon · Answer

That is correct The file is at the top level of the directory So i am just running `prefect block register file blocks py`

Matthew Scanlon · Answer

Well this is awkard I am also import Block from the slack sdk So the class isnt being read as a prefect block Gotta be careful with imports

Matthew Scanlon · Answer

As a followup question Is there a way to set one field as the unique key for a block For instance if i have a block ```MyBlock Field 1 Field 2 Field 3``` Is there a way I can tell prefect Field 1 will always be unique use this as the key So i can load the block via MyBlock foo where field 1 == foo

Bianca Hoch · Answer

Good question I ll do some digging on my end and raise to the team to see if they have any suggestions

Bianca Hoch · Answer

HI Matthew at the current moment we don t have a solution for enforcing uniqueness for the field I d recommend opening a feature request in our github repo if you d like <https github com PrefectHQ prefect issues>