Add min/max/first selector for alerts

[ezraodio1]

What type of PR is this?

• Feature

Description

This feature allows the user to create an alert that checks the minimum, maximum, or first value of a column when evaluating.

Currently, alerts will only check the first value of a column when evaluating.

This change makes alerts more useful and allows users to set up new kinds of conditions to test for.

How is this tested?

• Unit tests (pytest, jest)
• E2E Tests (Cypress)
• Manually
• N/A

Related Tickets & Documents

Mobile & Desktop Screenshots/Recordings (if there are UI changes)

[eradman]

Very nice feature!

We should also add a new variable called ALERT_SELECTOR so that this option can be rendered in an alert email template.

See render_template() at

redash/redash/models/__init__.py

Lines 992 to 1000 in a69f7fb

	context = {
	"ALERT_NAME": self.name,
	"ALERT_URL": "{host}/alerts/{alert_id}".format(host=host, alert_id=self.id),
	"ALERT_STATUS": self.state.upper(),
	"ALERT_CONDITION": self.options["op"],
	"ALERT_THRESHOLD": self.options["value"],
	"QUERY_NAME": self.query_rel.name,
	"QUERY_URL": "{host}/queries/{query_id}".format(host=host, query_id=self.query_rel.id),
	"QUERY_RESULT_VALUE": result_value,

[ezraodio1]

rendered in an alert email template

Very nice feature!

We should also add a new variable called ALERT_SELECTOR so that this option can be rendered in an alert email template.

See render_template() at

redash/redash/models/__init__.py

Lines 992 to 1000 in a69f7fb

	context = {
	"ALERT_NAME": self.name,
	"ALERT_URL": "{host}/alerts/{alert_id}".format(host=host, alert_id=self.id),
	"ALERT_STATUS": self.state.upper(),
	"ALERT_CONDITION": self.options["op"],
	"ALERT_THRESHOLD": self.options["value"],
	"QUERY_NAME": self.query_rel.name,
	"QUERY_URL": "{host}/queries/{query_id}".format(host=host, query_id=self.query_rel.id),
	"QUERY_RESULT_VALUE": result_value,

Good call. Just added the selector to the template.