aws terraform cloudwatch rule as lambda trigger

I'm trying to configure cloudwatch rules that'll trigger lambda functions on a specific day/time with the following:

resource "aws_lambda_function" "cleanup_daily" {
  filename          = "name"
  function_name     = "name"
  role              = "arn<removed>"
  handler           = "snapshotcleanup.lambda_handler"
  source_code_hash  = "${base64sha256(file("file_name"))}"
  runtime           = "python2.7"
  timeout           = "20"
  description       = "desc"
}

resource "aws_cloudwatch_event_rule" "daily_rule" {
  name                = "name"
  description         = "desc"
  schedule_expression = "cron(....)"
}

resource "aws_cloudwatch_event_target" "daily_target" {
  rule  = "${aws_cloudwatch_event_rule.daily_rule.name}"
  arn   = "${aws_lambda_function.cleanup_daily.arn}"
}

However the lambda functions do not run. If I look at lambda and check the triggers tab, there's nothing there. If I look at the cloudwatch rules and look under Targets, the lambda function shows up and if I click on it I'm redirected to the function itself. Any ideas what might wrong here?

For one of the cloudwatch rules I clicked on edit -> save -> configure details -> update without changing anything and that now shows up under the trigger tab in lambda but still need to get the others to work w/o this step,