Custom multiple choice lookup table for cases that share the parent of the current case

Users
1

In several places we use custom multiple choice lookup tables to list and
select from child cases filtered by the current case - for example, listing
household members for the current household.

Where we've done that the filter looks like this:
index/parent = instance('commcaresession')/session/data/case_id

We'd like to do this where the cases to select from share a parent with the
current case - for example, listing household members as part of a farm
form, where the farm is also a child of the household.

I've tried a few variations of how I think the filter for this should look
but they don't seem to work. Any tips?

Thanks in advance for any help.

2

Amber,

I'd recommend breaking this into two parts:
For the first, you'll need to get the parent_id based on the current case_id
Then, you'll need to filter the case_db for cases that have this parent_id
value

The first part would look something like (pseudo code):
instance('casedb')/casedb/case[@case_id=instance('commcaresession')/
session/data/case_id]/parent_id
The second part would look like:
instance('casedb')/casedb/case/[parent_id=($value_from_above)]

Hope this helps.

Cheers,
Will

ยทยทยท On Tue, Aug 9, 2016 at 7:06 AM, wrote:

In several places we use custom multiple choice lookup tables to list and
select from child cases filtered by the current case - for example, listing
household members for the current household.

Where we've done that the filter looks like this:
index/parent = instance('commcaresession')/session/data/case_id

We'd like to do this where the cases to select from share a parent with
the current case - for example, listing household members as part of a farm
form, where the farm is also a child of the household.

I've tried a few variations of how I think the filter for this should look
but they don't seem to work. Any tips?

Thanks in advance for any help.

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3

Thanks Will, that's fantastic. I'll give it a go.