From the docs about `filter_by`:

For eg: 

category:=Shoe

 will match documents from the category shoes and not from a category like 

shoe rack

. You can also filter using multiple values: 

category:= [Shoe, Sneaker]

.

Is this an OR? i.e. it returns results that have either a category of "Shoe" or "Sneaker" (or both)?

This is an OR

cool that's what I figured. Might be worth adding to the docs though to make it clear

Oh just realized it’s not explicitly called out as an OR, will add that