Hello there,
This is really two questions into one.
For the first question, when looking at the “include” argument in the “2.1.12.01 – DEMO – Post Arguments”, you say that because we can’t assign an array of values to an argument, we should use “include[]=id1&include[]=id2” for indicating we want to include both posts with id1 and id2.
But then, when you are looking at the “categories” argument you do use “categories=id1&categories=id2”, which actually doesn’t seem to work as intended as, when I replicated on my own site, it replies with only those posts with “categories=id2”.
So, if my understanding is correct, without [] the second value overrites the first and, if we want both to be taken into account, we should use [] after the argument name.
So, here’s the question: Am I understanding it correct?
As for the second question, and assuming I’ve got the concept above OK, when we use the “categories” argument as this “categories[]=id1&categories[]=id2” we would be getting all posts which have either category with id1 OR category with id2.
And here’s the second question, is there a way of using endpoint arguments so that we could get only those posts that have both category with id1 AND category with id2?
Many thanks!