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Vaadin: value from DateField is null after conversion


Vaadin: value from DateField is null after conversion

By : Ivanov Vasily
Date : November 23 2020, 04:01 AM
will help you I have recreated your setup with only minor differences (using Vaddin 8.4.3 and no attempt to save to DB) and for me, it works.
However, I do have an idea where your problem is:
code :
@Override
public LocalDate convertToPresentation(java.sql.Date value, ValueContext context) {
    if (value == null) {
        //return LocalDate.now();
        return null;
    }
    return value.toLocalDate();
}
order.setCreationDate(new java.sql.Date(Calendar.getInstance().getTime().getTime());); //not sure how, I just googled it
binder.setBean(order);


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Vaadin DateField in 24 hour mode

Vaadin DateField in 24 hour mode


By : chocolateTrill
Date : March 29 2020, 07:55 AM
wish of those help Unfortunately overriding 12/24h clock setting to something else than Locale says is not supported.
To add such a service, I would inherit InlineDateField and add methods for overriding 12-24 clock setting. On the client-side one must take a look at VCalendarPanel.java and add pass this setting to if statement that calls getDateTimeService().isTwelveHourClock().
Converting value of DateField in vaadin

Converting value of DateField in vaadin


By : Mike
Date : March 29 2020, 07:55 AM
this will help You need to format the Date in your bean class. Not in your View code.
code :
private SimpleDateFormat dateFormat;
private Date timestart;

public ConstructorOfYourClass{
    timestart = new Date(); //Default date
    //Your prefered date format
    dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm"); 

} 
//... other Code ...


//Getter method of your Date
public String getdateFormat(){
return dateFormat.format(timestart);
}
Vaadin DateField showing "null" instead of Days and Month

Vaadin DateField showing "null" instead of Days and Month


By : Carro
Date : March 29 2020, 07:55 AM
hop of those help? I have a vaadin application with a DateField. Sometimes randomly the days and the month are displayed as null. The locale is set to German. , I figured it out I have to set the locale of the UI first:
code :
protected void init(VaadinRequest request) {
    setLocale(Locale.getDefault());
    getSession().setLocale(Locale.getDefault());
    ....
}
DateField Vaadin Component with SQL Date

DateField Vaadin Component with SQL Date


By : lucky
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further So, I have a property SQL.Date in my POJO class. I want to bind it using Binder from Vaadin Component, but always returned like this: , This
code :
public class SqlDateToLocalDateConverter
       implements Converter<LocalDate,java.sql.Date> {
    @Override
    public Result<java.sql.Date> convertToModel(LocalDate value,
           ValueContext context) {
        if (value == null) {
            return Result.ok(null);
        }
        return Result.ok( java.sql.Date.valueOf( value) );
    }
    @Override
    public LocalDate convertToPresentation(java.sql.Date value,
           ValueContext context) {
        return value.toLocalDate();
    }
}
    binder.forField(myForm.getMyDateField())
       .withConverter(new SqlDateToLocalDateConverter())
       .bind(MyBean::getSqlDate, MyBean::setSqlDate);
Vaadin DateField saves null value to database

Vaadin DateField saves null value to database


By : Hagen Finley
Date : November 06 2020, 04:01 AM
will be helpful for those in need Everything is okay except one little detail in your custom Converter class: there is one incocnsistency with the usage of Date class.
Three times you use java.sql.Date as Identifier of the class, but one time you forgot it (implements Converter) and there it mistakingly took java.utils.Date.
code :
import com.vaadin.data.Converter;
import com.vaadin.data.Result;
import com.vaadin.data.ValueContext;

import java.sql.Date;
import java.time.LocalDate;

public class SqlDateToLocalDateConverter implements Converter<LocalDate, java.sql.Date> {

    @Override
    public Result<java.sql.Date> convertToModel(LocalDate value, ValueContext context) {
        if (value == null) {
            return Result.ok(null);
        }
        return Result.ok( java.sql.Date.valueOf(value) );
    }

    @Override
    public LocalDate convertToPresentation(java.sql.Date value, ValueContext context) {
        if (value == null) {
            return LocalDate.now();
        }
        return value.toLocalDate();
    }
}
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