java.time.LocalDateTime data binding seems to be incorrect in Grails 6.1.0

[monetschemist]

Expected Behavior

A domain class having a field declared to be java.time.LocalDateTime should have default data binding that expects the standard ISO-8601 string formats defined in that class.

For example, a String value such as 2023-12-11T17:12 should be successfully converted to the corresponding LocalDateTime value.

Actual Behaviour

The default data binding fails to convert such String values. For example, in my class Scenario which has a LocalDateTime field dateTime, the ScenarioController save() method fails on data binding with a message like:

scenario.errors org.grails.datastore.mapping.validation.ValidationErrors: 1 errors
Field error in object 'Scenario' on field 'dateTime': rejected value [2023-12-11T17:12]; codes [Scenario.dateTime.typeMismatch.error,Scenario.dateTime.typeMismatch,scenario.dateTime.typeMismatch.error,scenario.dateTime.typeMismatch,typeMismatch.Scenario.dateTime,typeMismatch.dateTime,typeMismatch.java.time.LocalDateTime,typeMismatch]; arguments [dateTime]; default message [Text '2023-12-11T17:12' could not be parsed at index 10]

This problem can be worked around by definining a specific data binding following the example of the BindUsing annotation provided in the Grails 6.1.0 docs. In my case, the following works:

import grails.databinding.BindUsing

...

    @BindUsing({obj, source ->
        LocalDateTime.parse(source['dateTime'])
    })
    LocalDateTime dateTime

I suppose this hints that the default data binding for LocalDateTime should use its parse() method.

Steps To Reproduce

Create a domain class with a java.time.LocalDateTime field; create the CRUD for it; run the application and create a new instance of that domain class; enter the desired local date and time and save.

Environment Information

• Ubuntu 23.10
• OpenJDK Runtime Environment Temurin-11.0.21+9 (build 11.0.21+9)

Example Application

This application has a single domain class with a LocalDateTime field

Version

6.1.0

[monetschemist]

I realized I probably should have mentioned that the format including the T between the date and time components of the string is generated in my case by HTML input type="datetime-local" and not g:datePicker.

[monetschemist]

@puneetbehl thank you so much! a question if I may - is this in 6.1.2 or somewhere down the road?

Again thank you so much!

[puneetbehl]

It will be a part of Grails 6.2.0 which we'll release in a few days.

[monetschemist]

@puneetbehl thanks very much for that clarification, and thanks again for fixing this!