One-to-One relationship with primary key and unique key combination. This example has relationship triangle. :)

index.cfm

<cfscript>
	ormreload();
			
	//Save
	
	objt6 = tbl6Service.new({"col":"tbl6"});
	objt7 = tbl7Service.new({"col":"tbl7"});
	objt8 = tbl8Service.new({"col":"tbl8"});
	
	objt6.addTbl8(objt8);
	objt6.setTbl7(objt7);

	objt7.settbl6(objt6);
	objt7.settbl8(objt8);
	
	objt8.settbl6(objt6);
	
	entitysave(objt6);
</cfscript>

tbl6.cfc

component name="tbl6" persistent='true'  accessors="true"{
	property name="id" fieldtype="id" generator="native";
	property name="col";
	property name="tbl7" fieldtype="one-to-one" cfc="tbl7" cascade="all";
	property name="tbl8s" cascade="all-delete-orphan" fieldtype="one-to-many" singularname="tbl8"
		cfc="tbl8" type="array" inverse="true";
}

tbl7.cfc

component name="tbl7" persistent='true'  accessors="true"{
	property name="tbl7id" fieldtype="id"  generator="foreign" params="{property='tbl6'}";
	property name="tbl6" fieldtype="one-to-one" cfc="tbl6" constrained="true";
	property name="col";
	property name="tbl8" fkcolumn="tbl8id" fieldtype="one-to-one" cfc="tbl8" cascade="all";
}

tbl8.cfc

component name="tbl8" persistent='true'  accessors="true"{
	property name="id" fieldtype="id" generator="native";
	property name="col";
	property name="tbl7" fieldtype="one-to-one" cfc="tbl7" mappedBy="tbl8";
	property name="tbl6" fieldtype="many-to-one" cfc="tbl6" fkcolumn="tbl6id";
}