I have a “has_and_belongs_to_many” relationship between two tables,
meaning I have a join table that contains the two ids of each table.
For simplicity let’s call them “foo” and “bar”. I want to delete a bar
from a foo but not actually delete the bar itself.
foo = Foo.find(1)
bar = Bar.find(1)
foo.bars << bar
foo.bars.delete(bar) # actually deletes the bar record which I don’t
so what should I do to remove the association, but retain the bar