API Request Filter Object Variations

balls.js

// "$and" and "$in"
{ "$and" : [
    { "projob.job.department" :
        { "$in" :
            [ "Engineering", "Marketing" ]
        }
    },
    { "projob.rating" : {
        "$in" :
            [ 3, 4, 5 ]
        }
    } ]
}


// "$and" and no "$in"
{ "$and" : [
    {
        "projob.department" : "Engineering"
    },
    {
        "projob.rating" : 5
    }]
}


// no "$and" and "$in"
[
    { "projob.job.department" :
        { "$in" :
            [ "Engineering", "Marketing" ]
        }
    },
    { "projob.rating" : {
        "$in" :
            [ 3, 4, 5 ]
        }
    }
]


// no "$and" and no "$in"
[
    {
        "projob.job.department" : "Engineering"
    },
    {
        "projob.rating" : 5
    }
]

#1 is good
#2 is technically correct but let's just use $in context for now, since the filters are always a list. This will simplify the back end too.
#3 and #4 are invalid.

I'll wrap the fields in every request in an "$and" and the values in "$in" (#1)