Add QueryBuilder#none?

Author: jgaskins

spec/interro_spec.cr

@@ -654,6 +654,17 @@ describe Interro do
       UserQuery.new.search("search").should contain user
     end
 
+    it "can check whether any records match" do
+      user = create_user
+      matching = UserQuery.new.with_id(user.id)
+      empty = UserQuery.new.with_id(UUID.v7)
+
+      matching.any?.should eq true
+      matching.none?.should eq false
+      empty.any?.should eq false
+      empty.none?.should eq true
+    end
+
     describe "transactions" do
       it "commits without error" do
         user = nil

src/query_builder.cr

@@ -501,6 +501,10 @@ module Interro
     end
 
     def any? : Bool
+      !none?
+    end
+
+    def none? : Bool
       sql = String.build do |str|
         str << "SELECT 1 AS one"
         str << " FROM " << sql_table_name
@@ -512,7 +516,7 @@ module Interro
         str << " LIMIT 1"
       end
 
-      !!connection(CONFIG.read_db).query_one? sql, args: @args, as: Int32
+      !connection(CONFIG.read_db).query_one? sql, args: @args, as: Int32
     end
 
     protected def insert(**values) : T