in prefect 1 how to return a value from a flow im calling fl

Question

in prefect 1 how to return a value from a flow im calling flows via `create flow run` and i want to pass what i generate in the flow to a subsequent flow

Kalise Richmond · Answer

Hi Jon I think you ll need to <https docs v1 prefect io core concepts results html result objects|configure results> and then you ll be able to grab the results from that

Jon · Answer

thanks < Kalise Richmond> is there a way that i can access the flow s results in memory writing to a file is too heavy duty

Jon · Answer

perhaps there s a way to search a flow s state by uuid

Kalise Richmond · Answer

hey Jon are you just looking to pass the state or are you trying to pass a value from the first flow Here s an <https discourse prefect io t how to pass data from a child flow to another task in a parent flow 126|example> that might help

Jon · Answer

this is what i m looking for but the example is a bit confusing where does the task slug come from

Jon · Answer

``` create some data 1 ```

Jon · Answer

nvm i have to add it

Jon · Answer

but maybe i m doing something wrong Seems we can t find the slug ```Error during execution of task ValueError No task runs found while querying for task runs where task slug eq bronze file flow run id eq 5720e378 3b21 4674 8c61 198aa5951f6c map index eq 1 ``` ``` prefect task slug= bronze file def generate bronze file ```

Jon · Answer

what is the 1 coming from here ` create some data 1 `

Kalise Richmond · Answer

I believe every instance of a task gets the number appended because you can map over tasks

Jon · Answer

ok so if i call the task just once in my flow it ll have a 1

Kalise Richmond · Answer

I think so It s been a while since I ve tried it out

Kalise Richmond · Answer

looks like there is a `map index` field you can use as well <https docs v1 prefect io api latest tasks prefect html get task run result>

Jon · Answer

my task isn t mapped

Jon · Answer

it works by appending 1

Jon · Answer

IMO a bit too magical mage

Jon · Answer

also the docs say that slugs are stable `slug str optional ` The slug for this task Slugs provide a stable ID for tasks so that the Prefect API can identify task run states If a slug is not provided one will be generated automatically once the task is added to a Flow

Jon · Answer

so kinda confusing the slug actually changes here

Jon · Answer

Jon · Answer

but thx for your help

Kalise Richmond · Answer

Thanks for the feedback I ll make sure to let our doc experts know smiley