If I use the following filter, it's OR

filter: {tags: {elemMatch: {contentful_id: {eq: $tagId}, name: {eq: "published"}}}}

because filters over multiple fields are OR

filter: {

tags: {

elemMatch: {

contentful_id: {

eq: $tagId

},

name: {

eq: "published"

}

}

}

}

resulting in

• tag.id === $tagId

• OR

• tag.name === "published"

If instead I use (abuse) the different matcher things for the same field, it is AND

filter: {tags: {elemMatch: {contentful_id: {}, name: {eq: "published", in: "i.book", nin: "page"}}}}

formatted:

filter: {

tags: { // only 1 field

elemMatch: {

name: {

eq: "published",

in: "i.book",

nin: "page"

}

}

}

}

resulting in:

• tag.name === "published"

• AND

• tag.name === "i.book"

• AND

• tag.name !== "page"

I'm pretty sure I'm abusing the 'in' operator here, to have a second 'eq'. And I assume the 'glob' and 'regex' can be used the same way. So we can use 4 x '===' (eq, in, glob, regex) and 2 x '!==' (ne,nin)