Ensuring Filtering if variable is undefined

I have an application that is a multi-tenant app where we always filter by

TenantId

TenantId

TenantId

TenantId , so for example we do queries like this:

 var contacts = await db.contacts.findMany({
        where: {
            tenantId: tenantId,
        }
    });

 var contacts = await db.contacts.findMany({
        where: {
            tenantId: tenantId,
        }
    });

 var contacts = await db.contacts.findMany({
        where: {
            tenantId: tenantId,
        }
    });

 var contacts = await db.contacts.findMany({
        where: {
            tenantId: tenantId,
        }
    });

While obviously I need to check the

tenantId

tenantId

tenantId

tenantId but from a general question, when a a variable sometimes is undefined, it completely ignores that part of query. Some of this is just the nature of how JS objects are built.

But I am curious if there is a way to guarantee that the where statement never ignores a variable. I think this is where most query builder alternatives handle by passing variables into a method.

Basically I am curious if there is ways to guarantee that no filter leaks because of a value being undefined.

Ensuring Filtering if variable is undefined

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