How to remove all linked records from a link group?

Hi Guys,

I'm struggling with clearing a static record link group from all records. For clearing attributes, there is the method record.clear_attributes([names]), but I didn't find something similar for static link groups. I've already tried
record.links['rlg_name'].clear()
record.set_links(link_name='rlg_name', records=[])
mi_update_links([record])
but this didn't change anything on the server.

Any hints how to get rid of all records in a given record link group?

Thanks in advance & bests,
Daniel

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Accepted answers

Andy_Grigg

Hi Daniel,

I think you've found a bug in how we handle link group changes. The code you've written is essentially correct, it should be:

record.set_links(link_name='rlg_name', records=[])
mi.update([record], update_links=True)

But this only works if at least one link is added to the link group. I'll double-check with my colleagues tomorrow if there's an intended alternative way of doing this, but to me it looks like a bug.

As a workaround, you can use the foundation layer to do the link deletion. Something like this should work:

gdl_session = mi.connect()
record_reference = gdl.RecordReference(
    DBKey="db_key",
    historyGUID="history guid",  # Or another identifier
)
unlink_records = gdl.UnlinkAllRecords(sourceRecords=[record_reference])
modifications = gdl.RecordLinkModifications(unlinkAllRecords=[unlink_records])
link_reference = gdl.RecordLinkGroupReference(
    DBKey="db_key",
    name="Link group name",
    partialTableReference=gdl.PartialTableReference(tableName="Table name"),
    recordLinkGroupType=gdl.GRANTA_Constants.RecordLinkGroupTypes.Static,  # Or CrossDatabase
)
unlink_request = gdl.ModifyRecordLinksRequest(
    recordLinkModifications=modifications,
    recordLinkGroupReference=link_reference,
)
response = gdl_session.dataImportService.ModifyRecordLinks(unlink_request)

All comments

Andy_Grigg

Hi Daniel,

I think you've found a bug in how we handle link group changes. The code you've written is essentially correct, it should be:

record.set_links(link_name='rlg_name', records=[])
mi.update([record], update_links=True)

But this only works if at least one link is added to the link group. I'll double-check with my colleagues tomorrow if there's an intended alternative way of doing this, but to me it looks like a bug.

As a workaround, you can use the foundation layer to do the link deletion. Something like this should work:

gdl_session = mi.connect()
record_reference = gdl.RecordReference(
    DBKey="db_key",
    historyGUID="history guid",  # Or another identifier
)
unlink_records = gdl.UnlinkAllRecords(sourceRecords=[record_reference])
modifications = gdl.RecordLinkModifications(unlinkAllRecords=[unlink_records])
link_reference = gdl.RecordLinkGroupReference(
    DBKey="db_key",
    name="Link group name",
    partialTableReference=gdl.PartialTableReference(tableName="Table name"),
    recordLinkGroupType=gdl.GRANTA_Constants.RecordLinkGroupTypes.Static,  # Or CrossDatabase
)
unlink_request = gdl.ModifyRecordLinksRequest(
    recordLinkModifications=modifications,
    recordLinkGroupReference=link_reference,
)
response = gdl_session.dataImportService.ModifyRecordLinks(unlink_request)

Daniel Manocchio

Hi Andy,

Thanks for your answer! I already feared that this isn't intended behavoir but a bug... g
I'll give it a try with the foundation snippet.

Bests,
Daniel