Cuba 7 multiple selections

Support
#1

Hello,

I need a component in my Chart screen in order to select multiple Organization(s) (entity) browse and show them as Bar Chart.
New chart screen is made in Cuba 7 but Organization is made in Cuba 6.
Which component should I use for multiple selections?
I ve tried with tokenList I set lookupScreen (Organization.browse), multiselect checked, but doesn’t work.
The problem is that I cannot set optionsContainer=“organizationsDs” because I have the next error:
IllegalArgumentException: Container ‘organizationsDs’ not found
With a Pickerfield I think I need for a table…

Generally speaking is there any possibility to adapt Cuba7 components proprieties to Cuba 6 (datasaources) or I need to redo Cuba 6 screens?
Please advise.

#3

Hello @neutrino

All components are able to work both with containers and datasources. The limitation is to use only containers for CUBA 7 screens and datasources for CUBA 6 screens.

The TokenList component seems to be the most suitable in your case.

Please share screen XML descriptor if the problem will not be solved.

Regards,
Daniil

#4

I have the next error: RuntimeException: Unable to determine entity class to open lookup
Where should I put datasource because there is no such option.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<window xmlns="http://schemas.haulmont.com/cuba/screen/window.xsd"
        caption="msg://caption"
        messagesPack="com.crm.web.screens">
    <layout>
        <vbox id="chartContainer"/>
        <tokenList id="tokenList">
            <lookup lookupScreen="crm$Organization.browse" multiselect="true" lookup="true" />

        </tokenList>
    </layout>
</window>
#5

You should define datasource or container for TokenList to be able to open lookup screen:

<tokenList dataContainer="organizationsDc"
        ...>
    <lookup ... />
</tokenList>
#6

I told you the (Organization) screen is made in Cuba 6 so I don’t have organizationsDc. Only OrganizationsDs.

#7

It was just an example. You can set a datasource in the same way:

<tokenList datasource="organizationsDs"
        ...>
    <lookup ... />
</tokenList>
#8

I have a null pointer exception when I try to open the screen.

lang.NullPointerException at com.haulmont.cuba.gui.xml.layout.loaders.TokenListLoader.loadDatasource(TokenListLoader.java:247)
at com.haulmont.cuba.gui.xml.layout.loaders.TokenListLoader.loadTokenListItems(TokenListLoader.java:89)

<layout>
        <vbox id="chartContainer" />
        <tokenList id="tokenList" datasource="organizationsDs">
            <lookup lookupScreen="crm$Organization.browse" multiselect="true" lookup="true" />

        </tokenList>

    </layout>

On the other hand the organizationsDs is underline with the next message:
‘Datasources’ works only in legacy cuba screens. In new Cuba screens please use data containers.

#9

On the other hand the organizationsDs is underline with the next message:
‘Datasources’ works only in legacy cuba screens. In new Cuba screens please use data containers.

It means that the screen is based on CUBA 7.

I suppose that NPE is thrown because there is no organisationsDs defined in the screen.

#10

OK. I try to explain in details.

The tokenList is placed into a Cuba 7 screen. I don’t have any datasource here (neither Cuba 7 nor Cuba 6). Let say it’s a blank screen.
The browse screen that I want to access is made (imported from) in Cuba 6.

Now, back to my issue, is it possible to use tokenList in this way?

#11

You can use TokenList without datasource or container, but lookup functionality will not be available

#12

And what could be the solution? To redo the screen where is placed tokenList in Cuba 6?
Can you give me an example?

#13

You can use new API - lookup screen provider:

@Inject
protected TokenList tokenList;
@Inject
private ScreenBuilders screenBuilders;

@Subscribe
private void onInit(InitEvent event) {
    tokenList.setLookupProvider(() ->
            screenBuilders.lookup(Employee.class, this)
                    .withScreenId("sample_Employee.browse")
                    .withLaunchMode(OpenMode.DIALOG)
                    .build());
}
1 Like
#14

Thank you! It works.
However I saw that after loguout/login the selected (Organization) records disappear.

Three question pls:

  1. Where are keep the data in TokenList (because I don’t set any datasource)?
  2. Is there any possibility to make the selection persistent (is mandatory to define a new (Chart) entity in relation many(one)-to-many with Organization)?
  3. How can I have access to Organization.browse tokenlist selection attributes ((let say: “name”) - because I need to put Organization’s attributes into a chart)?
#15

Where are keep the data in TokenList (because I don’t set any datasource)?

Not sure that understand you correctly. Could you clarify the question?

Is there any possibility to make the selection persistent

Create a new entity and just save selection.

How can I have access to Organization.browse tokenlist selection attributes

You can get a value of TokenList via tokenList.getValue() that will return current selection, iterate over collection and get required fields.

#16

Ok, but I suppose this tokenList.getValue() has to stay under some specific handler (or listener) in order to get the selected Organizations names. Unfortunately I don’t have neither datasource nor table. Could you give me an example pls?

   Organization o;
   tokenList.getValue(o.getName());
#17

As I said the TokenList component returns a collection:

Collection<Organisation> selectedOrgs = tokenList.getValue();

for (Organization org : selectedOrgs) {
    String name = org.getName();
}
#18

Unfortunately I get this error:

web/screens/ChartScreen.java:59: error: incompatible types: Object cannot be converted to Collection<Organization>
        Collection<Organization> selectedOrgs = tokenList.getValue();

If I inject instead of

@Inject
    protected TokenList  tokenList;

@Inject
    protected TokenList<Organization> tokenList;

when I open Chartscreen I have null pointer exception

#19

If I use this solution

  Collection<Organization> selectedOrgs = tokenList.getValue();

      if(selectedOrgs !=null) {

          for (Organization org : selectedOrgs) {
              String name = org.getName();
              log.info("ssssssssssssssssssssssssssssssssssssssss...."+ name);
          }

I get rid of null pointer exception but the program doesn’t enter in for loop even I select some Organization records. So I cannot extract names.

If I use instead of onInit onBeforeClose event it works.
However I need these info (name) when the screen is open not when I close the screen.
I could add a button with event.preventWindowClose() onClick but I don’t know if this is the right solution.

#20

Also could be used tokenList.addValueChangeListener…

#21

Yes, you should use generics while injecting component to make things work.

Could you clarify what NPE is thrown?