Java tutorial: Listing entities in a data grid and configuring columns (part 6)

[@pixels9964]

im getting error : Consider defining a bean of type 'com.example.test.backend.repository.CompanyRepository' in your configuration.

[@barney3142]

In grid.setColumns("firstName", "lastName", "email", "status"); can we somehow use the entity's fields to link it? I'm asking because if we changed the entity this would break easily.

[@trdngy8230]

Why muss we remove the key "company" first? I mean why the following implementation does not work grid.setColumns("firstName", "lastName", "email", "status"); grid.removeColumnByKey("company"); it shows the error "...The column with key 'company' is not part of this Grid"

[@vaadinofficial]

In your example, you have explicitly set the columns to not include "company", so removing it will not work. In the tutorial, company gets automatically added because it's using `new Grid(Contact.class)`. In this case, we want to override the autogenerated column with a custom one, and want to remove the autogenerated one.

[@RebecaOprea-kj1tf]

Where can you see the users you added?

[@AhmadRajab]

im getting an error Description: Parameter 0 of constructor in org.vaadin.example.service.ContactService required a bean of type 'org.vaadin.example.backend.repositoryContactRepository' that could not be found. Action:

[@vaadinofficial]

It seems you're missing a dot before ContactRepository in `org.vaadin.example.backend.repositoryContactRepository`

[@FiruzzZ-777]

great tutorial, but could u fix the list (order) of videos, when I press next from this one it jumps to the #10, the #10 jumps to #5 and so on...

[@vaadinofficial]

Thanks for the heads up, we'll take a look at why that's happening

[@vaadinofficial]

The videos seem to be in the correct order in the playlist and the in-video link at the end of this video is pointing correctly to the next video. Where are you pressing next when you are ending up in the wrong video? So we can look into what's causing it.

[@FiruzzZ-777]

@@vaadinofficial I didn't access through the playList, I came directly to #6, so I guess the "next" in this way is a suggestion from KZbin and not related to any playlist. Sorry for the misunderstood.

[@nayankumarbn3709]

What i have actualy did was after implementing the one which shown on this video, i had created a tab while switching to employee it will show employee details and while awitching to company in tab it shows company details. Iam facing an nullpointer exception while switching the company tab it says CompanyService.findAll() is nulk do any one know what might be the issue #vaadinofficial

[@lumea-arboris]

This is amazing. Thank you very much, this is an amazing technology

[@rashvitpatel9269]

I am getting nullpointer exception in updateList something related to autowiring of service please help me I am using eclipse

[@vaadinofficial]

Autowiring is a part of Spring, so it works the same regardless of the IDE you use. Please check your code against the finished source code here and see if you can spot the issue: github.com/vaadin-learning-center/crm-tutorial

[@rashvitpatel9269]

@@vaadinofficial ok sir till now I have done upto this video and I tried autowiring services as well as repos inside the services but still getting the same null pointer exception. I will look into the github code and proceed from there

[@Muescha]

i 50% when i run "build application" i get an Error: "Could not navigate to '' Reason: Couldn't find route for '' Available routes: This detailed message is only shown when running in development mode." is there any solution for this?

[@Muescha]

i found that adding `@SpringBootApplication(scanBasePackages = {"com.vaadin"})` to the `Application` class seems to work

[@Muescha]

more possible settings i found here: github.com/spring-projects/spring-boot/issues/18109

[@Muescha]

i think it would be nice to add `scanBasePackages` to the tutorial, so beginners are not have this error

[@lauraarias316]

This is really helpful, thank you!

[@vaadinofficial]

Thank you for your feedback. Great to hear that 😊

[@Muescha]

where exactly was this info about the library reload?

[@volkerbechtel8762]

nice tutorial, thanks ! For me it's the best tutorial in this technology sector, very amazing for getting in, thanks ! But some question: I added (for getting experience) an amount field in the contact entity (BigDecimal) , but can't render it in the grid with grid.addColumn("amount").setRenderer(new NumberRenderer((ValueProvider) new DecimalFormat("$ #,##0.00"))); what do i wrong ? Thanks !

[@luisluiscunha]

I simply don't understand why only Vaadin is worried with allowing Java developers to be able to make fullstack development in such a clean and simple way. This is like Swing for the 2010/20's+

[@dmitryvoronov669]

Hi! How do I create a pagination in vaadin with datagrid? What should I add to the code?

[@marcushellberg13]

You can use the callback based DataProvider instead of passing a List: vaadin.com/docs/v14/flow/binding-data/tutorial-flow-data-provider.html#lazy-loading-data-from-a-backend-service

[@rashvitpatel9269]

Autowiring should be shown having issues on eclipse

[@hsuanyang9887]

really helpful

[@Takigavin]

Something you missed with this one, for the new company column we added. There is no sorting functionality like there is for all of the other columns. Quick fix for everyone is after the .setHeader("Company") insert .setSortable(true); So the entire function would be: grid.addColumn(contact -> { Company company = contact.getCompany(); return company == null ? "-" : company.getName(); }).setHeader("Company").setSortable(true);

[@marcushellberg13]

Good catch, thanks!