Can Cleric cast spiritual weapon + attack weapon + cantrip?

@bbarlach @JeremyECrawford @ChrisPerkinsDnD@JeremyECrawford @ChrisPerkinsDnD @mikemearls cleric wants to cast spiritual weapon + attack w/ it + cast cantrip. I say it’s not possible? unless something weird is happening there the caster has used his action; can't cast cantrip

— (((Mike Mearls))) (@mikemearls) July 13, 2016