Date comparisons with Rego

[peteroneilljr]

How to use Rego for date comparisons?

[peteroneilljr]

Answer taken from slack

package play

time_window_min := time.parse_rfc3339_ns("2019-10-22T12:00:00Z")
time_window_max := time.parse_rfc3339_ns("2022-10-22T13:00:00Z")

default allow = false

allow {
    inside_valid_time_window
}

inside_valid_time_window {
    current_time := time.now_ns()
    time_window_min <= current_time
    time_window_max >= current_time
}

[scottc-WellSky]

I realize this is old, but I'm also having trouble comparing dates in Rego. The solution in this answer incorrectly returns true for me in the Rego Playground.

[scottc-WellSky]

Sorry, this does work correctly when ran as a complete policy. It only returns true when I was evaluating the inside_valid_time_window function by highlighting it and evaluating it in isolation.

[srenatus]

It does? 🤔 Curious. It's evaluating to false here: https://play.openpolicyagent.org/p/cbbMARjdET

[scottc-WellSky]

Yea, I'm a newbie in this area and apparently don't understand how executing a partial selection of code works in the Playground.

[srenatus]

Try to only select the rule:

it'll give you, well, nothing, undefined:

So allow will be undefined, too, and thus its default rule hits and allow evaluates to false.