score:0

Accepted answer

the bug with using multiple .include() in ef core 2 is fixed. look forward to the next public build of dotconnect for oracle.

score:1

is due to your statement:

var entities = helptopicrepository.entities.include(x => x.helparticles).firstordefault(t => topicids.any(a => a == t.id));

assuming that topicids is a list, here is a fix:

var entities = helptopicrepository.entities
    .include(x => x.helparticles)
    .where(t => topicids.contains(t.id))
    .firstordefault();

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