What does the context:'query' option do when using mongoose?

Question

In a failed attempt learning exercise to get validators to work with 'document.update', I came across something I don't understand.

I know now that it doesn't work, but one of the things I tried was setting my options to {runValidators:true, context:'query'}. In my validator function, I tried console.logging (this), with and without the context:"query" option.

There was no difference. I received a large object (is this called the 'query object'?) This seems to go against what I read here.

In the color validation function above, this refers to the document being validated when using document validation. However, when running update validators, the document being updated may not be in the server's memory, so by default the value of this is not defined.

It was not undefined , even without the context option.

I even tried making it an arrow function to see if the lexical this was any different. In that case, this was undefined, but again, changing the context option did not make a difference. (I'm still learning, so I don't know if that part is relevant).

in the model:

let Property = mongoose.model('Property', {
    name: {type:String, required:true},
    occupancy: {type:String},
    maxTenants: Number,
    tenants: [{ type:mongoose.Schema.Types.ObjectId, ref: 'Tenant', validate: [checkMaxTenants, "Maximum tenants exceeded for this property. Tenant not added."]}]
});
function checkMaxTenants(val){
    console.log("this",this);
    // return this.tenants.length <= this.maxTenants;
    return true;
}

and in the route:

        property.update({$set: {tenants:property.tenants}},{new:true,runValidators:true,context:'query'}, function(err,savedProperty){

Anything to help me better understand the discrepancy between what I think I'm reading and what I see would be great!