Accessing flow context from the subflow

General
1

Hello

I'm trying to package some of my flows into sub-flows to make it easier to follow.
One of my function nodes is going through the flow context store using:

flow.keys()

and delete some variables when they are not needed.
After packaging this into sub-flows this function stopped working.
I know that the parent variable can be accessed by using

flow.get('$parent.' + 'variable_name');

Is there any option to use keys() function and then to set specific $parent variables to undefined?

Basically, I need to retrieve a list of the parent flow variables to find ones that need deleting and delete them from the sub-flow level.

1 Like
2

Hi - good question. There is no way for a subflow to get the context keys of the parent flow. That scenario has not been considered in the api.

3

Hi.
Thank you for prompt response.
I thought that I do something wrong, now at least I know it's currently unavailable.
Do you know if this is planned to be included in the future releases?

4

Would it not be possible to build a kind of "interface" using existing nodes?

a) subflow sends a msg with a request to get a list of context keys -> parent flow responds back with list of context keys

b) subflow sends a msg with request to delete a specific key -> parent flow deletes key and responds with a confirmation

5

Nothing is planned. Until you mentioned it, it hasn't come up at all.

6

Is there any way of making official request?
How the decision is made on what is going on the new release?

I understand you can't just add stuff, because some random bloke on the internet is asking for it.

7

I've added to the backlog - https://trello.com/c/JILEMOQ5

It can be prioritised along with everything else.

1 Like
8

I don't see the reason why this wouldn't work, but in my case it's defeating the object of having a subflow.
Instead of making it simpler it will add complexity.

I will have to send request from the subflow and than inject the results back into input. As there is only one input to the subflow available I will have to manage the messages to get to the right part of the subflow. Alternatively I can have two subflows, but again this will make it more complex than it currently is with my function nodes.

9

Yes, I know, it was just a quick work-around idea but it depends on the urgency. If you have time to wait, then wait until this gets covered from the backlog

1 Like
10

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