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POAuto generation form issue vaadin with many to one field --- Select field shows objects hash code
 

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  1. POAuto generation form issue vaadin with many to one field --- Select field shows objects hash code
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    <p>I tried to auto generate a form using the JPA container. For a many to one entity, it fills the select box with hash code as shown -</p> <p><img src="https://i.imgur.com/AgzvcSs.png?1" alt=""> Is it possible to have some other parameter of the mapped entity to be displayed.</p> <p>These are my entities</p> <pre><code>@Entity @Table(name = "state") public class State { private String id; private String name; private Country country; @ManyToOne(fetch = FetchType.LAZY) @JoinColumn(name = "country_id", nullable = false) public Country getCountry() { return country; } public void setCountry(Country country) { this.country = country; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Id public String getId() { return id; } public void setId(String id) { this.id = id; } } @Entity @Table(name="country") public class Country { private String id; private String name; private List&lt;State&gt; states; @OneToMany(targetEntity=State.class, mappedBy="country", fetch=FetchType.EAGER) public List&lt;State&gt; getStates() { return states; } public void setStates(List&lt;State&gt; states) { this.states = states; } @Id public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } } </code></pre> <p>And this is my init method -</p> <pre><code>@Override protected void init(VaadinRequest request) { setupEntityManager(); FormLayout layout = new FormLayout(); setContent(layout); final JPAContainer&lt;State&gt; states = JPAContainerFactory.make(State.class, "test1"); final Form stateForm = new Form(); stateForm.setCaption("State Editor"); stateForm.addStyleName("bordered"); // Custom style stateForm.setWidth("420px"); stateForm.setBuffered(true); stateForm.setEnabled(false); final FieldFactory fieldFactory = new FieldFactory(); stateForm.setFormFieldFactory(fieldFactory); stateForm.setItemDataSource(states.getItem("k")); stateForm.setEnabled(true); final Button save = new Button("Save"); stateForm.getFooter().removeAllComponents(); stateForm.getFooter().addComponent(save); layout.addComponent(stateForm); save.addListener(new Button.ClickListener() { @Override public void buttonClick(Button.ClickEvent event) { try { System.out.println("----------------commiting"); stateForm.commit(); stateForm.setEnabled(false); } catch (Validator.InvalidValueException e) { } } }); </code></pre>
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    1. PTQuestion
    1. USCaptain Obvlious
    1. USamrk7
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    1. This table or related slice is empty.
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    1. VO
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      1. POAuto generation form issue vaadin with many to one field --- Select field shows objects hash code
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      1. VTApproveEditSuggestion
    2. VO
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      1. POAuto generation form issue vaadin with many to one field --- Select field shows objects hash code
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      1. VTUpMod
    1. COUsually the toString() method is used for this. Can you overwrite it ?
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      1. POAuto generation form issue vaadin with many to one field --- Select field shows objects hash code
      1. USAndré Schild
    2. COWorked great! Thanks
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      1. POAuto generation form issue vaadin with many to one field --- Select field shows objects hash code
      1. USamrk7
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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