More textual condition rule operators

[brandonkelly]

Description

Adds “has a value” and “is empty” operators to all text, number, and date range condition rules.

Related issues

• [4.x] 'Has a value'/'is empty' field condition for most field types #11070

[linear]

DEV-653 More textual condition rule operators

• has a value
• is empty
• equals
• begins with
• ends with
• contains

[michaelrog]

Is it possible that this implementation might yield some weird corner cases, since the PHP parts of the implementation (matchValue() etc.) are matching on truthy/falsy values, whereas the database parts are filtering on the presence of any value?

e.g. What happens if a text field has the value "0"? Querying not :empty: should probably still return such a record, but matchValue() would fail to match it...?

[brandonkelly]

@michaelrog PHP considers 0 to be “empty” (empty(0) === true) so I’m not sure if there’s a clear expected behavior there.