datatable primeFaces shows the number of correct records but does not show the fields

Question

I have a problem I can’t solve if you can help me thank you.

In short, it’s a prototype invoice registration with notafiscal items, I can enter the records through a dialog, the table shows that the records have been entered in the list, but the datatable shows the lines without the contents.

follows the files.

package br.com.beta.nfe.model;

import java.io.Serializable;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.MapsId;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Transient;
import javax.validation.constraints.NotNull;

@Entity
@Table(name = "notaFiscal")
public class NotaFiscal implements Serializable {

    private static final long serialVersionUID = 1L;

    private Long id;
    private Integer numero;
    private Date dataEmissao;
    private Emissor emissor;
    private Cliente cliente;
    private List<ItemNotaFiscal> itensNotaFiscal = new ArrayList<>();
    @Column(columnDefinition = "double")
    private BigDecimal vrTotalNotaFiscal;
    private String  observacao;

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "notaFiscalGenerator")
    @SequenceGenerator(name = "notaFiscalGenerator", sequenceName = "NOTAFISCAL_SEQ", allocationSize = 10)
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Integer getNumero() {
        return numero;
    }

    public void setNumero(Integer numero) {
        this.numero = numero;
    }

    @NotNull
    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "data_emissao", nullable = false)
    public Date getDataEmissao() {
        return dataEmissao;
    }

    public void setDataEmissao(Date dataEmissao) {
        this.dataEmissao = dataEmissao;
    }

    @NotNull
    @ManyToOne
    @JoinColumn(name = "emissor_id", nullable = false)
    public Emissor getEmissor() {
        return emissor;
    }

    public void setEmissor(Emissor emissor) {
        this.emissor = emissor;
    }

    @NotNull
    @ManyToOne
    @JoinColumn(name = "cliente_id", nullable = false)
    public Cliente getCliente() {
        return cliente;
    }

    public void setCliente(Cliente cliente) {
        this.cliente = cliente;
    }

    @OneToMany( cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.LAZY)
    public List<ItemNotaFiscal> getItensNotaFiscal() {
        for (ItemNotaFiscal inf : this.itensNotaFiscal) {
            System.out
                    .println("listando os itens da table !" +inf.getId()+" "+ inf.getItem().getDescricao()+" quantidade : "+inf.getQuantidade()+"preco : "+inf.getValorUnitario());
        }
        return itensNotaFiscal;
    }

    public void setItensNotaFiscal(List<ItemNotaFiscal> itensNotaFiscal) {
        this.itensNotaFiscal = itensNotaFiscal;
    }


    @NotNull
    @Column(name = "valor_total_nota", nullable = false, precision = 10, scale = 2)
    public BigDecimal getVrTotalNotaFiscal() {
        return vrTotalNotaFiscal;
    }

    public void setVrTotalNotaFiscal(BigDecimal vrTotalNotaFiscal) {
        this.vrTotalNotaFiscal = vrTotalNotaFiscal;
    }

    @Column(columnDefinition = "text")
    public String getObservacao() {
        return observacao;
    }

    public void setObservacao(String observacao) {
        this.observacao = observacao;
    }


    public void recalcularValorTotal() {
        BigDecimal total = BigDecimal.ZERO;



        for (ItemNotaFiscal itemNotaFiscal : this.getItensNotaFiscal()) {
            if (itemNotaFiscal.getItem() != null && itemNotaFiscal.getItem().getId() != null) {
                total = total.add(itemNotaFiscal.getTotalItem());
            }
        }

        this.setVrTotalNotaFiscal(total);
    }

    public void adicionarItemNotaFiscal(ItemNotaFiscal itemNotaFiscal) {

            this.getItensNotaFiscal().add(itemNotaFiscal);

    }

    @Transient
    public BigDecimal getValorSubtotal() {
        //return this.getValorTotal().subtract(this.getValorFrete()).add(this.getValorDesconto());
        return this.getVrTotalNotaFiscal();
    }

    @Transient
    public boolean isNovo() {
        return getId() == null;
    }

    @Transient
    public boolean isExistente() {
        return !isNovo();
    }



    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((id == null) ? 0 : id.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        NotaFiscal other = (NotaFiscal) obj;
        if (id == null) {
            if (other.id != null)
                return false;
        } else if (!id.equals(other.id))
            return false;
        return true;
    }





}

The bean :

package br.com.beta.nfe.controller;

import java.io.Serializable;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;

import javax.faces.event.ActionEvent;
import javax.faces.view.ViewScoped;
import javax.inject.Inject;
import javax.inject.Named;

import org.apache.commons.lang3.StringUtils;
import org.primefaces.event.SelectEvent;

import br.com.beta.nfe.model.Cliente;
import br.com.beta.nfe.model.Item;
import br.com.beta.nfe.model.ItemNotaFiscal;
import br.com.beta.nfe.model.NotaFiscal;
import br.com.beta.nfe.repository.Clientes;
import br.com.beta.nfe.repository.Itens;
import br.com.beta.nfe.service.CadastroNotaFiscalService;
import br.com.beta.nfe.service.NegocioException;
import br.com.beta.nfe.util.jsf.FacesUtil;

@Named
@ViewScoped
public class CadastroNotaFiscalBean implements Serializable {

    private static final long serialVersionUID = 1L;

    @Inject
    private Clientes clientes;

    @Inject
    private Itens itens;

    @Inject
    private Item item;

    @Inject
    private CadastroNotaFiscalService cadastroNotaFiscalService;

    @Inject NotaFiscal notaFiscal;

    private String codigoSKU;
    private BigDecimal valorUnitario;
    private Double quantidade;
    private Item itemLinhaEditavel;


    public CadastroNotaFiscalBean() {
        limpar();
    }

    public void inicializar() {
        if (FacesUtil.isNotPostback()) {
            if (this.notaFiscal == null) {
                limpar();
                // this.notaFiscal.adicionarItemVazio();
                // this.recalcularNotaFiscal();
            }
            // this.notaFiscal.adicionarItemVazio();
            this.recalcularNotaFiscal();

        }
    }

    public void handleSelect(SelectEvent event) {

        item = (Item) event.getObject();
        System.out.println("selecionou o item - > " + item.getDescricao());
        this.valorUnitario = item.getVrUnitario();
        System.out.println("o Item " + item.getDescricao()
                + " tem o preço unitario de -> " + item.getVrUnitario());
    }

    public void onItemSelect(Item selecionado) {

        item = selecionado;
    }

    public void insereItenNotaFiscal(ActionEvent actionEvent){

        ItemNotaFiscal itemNotaFiscal = new ItemNotaFiscal();
        itemNotaFiscal.setItem(item);
        itemNotaFiscal.setValorUnitario(item.getVrUnitario());
        itemNotaFiscal.setNotaFiscal(this.notaFiscal);
        itemNotaFiscal.setQuantidade(this.quantidade);
        Long ordem = (long) (this.notaFiscal.getItensNotaFiscal().size()+1);
        itemNotaFiscal.setId(ordem);

        this.notaFiscal.adicionarItemNotaFiscal(itemNotaFiscal);

        for (ItemNotaFiscal inf : this.notaFiscal.getItensNotaFiscal()) {
            System.out
                    .println("inseri o item !" + inf.getId()+" "+inf.getItem().getCodigoSKU()+" "+inf.getItem().getDescricao()+" "+inf.getValorUnitario()+" "+inf.getQuantidade());
        }
    }

    private void limpar() {
        notaFiscal = new NotaFiscal();

    }

    public void salvar() {
        try {
            this.notaFiscal = cadastroNotaFiscalService.salvar(this.notaFiscal);
            limpar();

            FacesUtil.addInfoMessage("Produto salvo com sucesso!");
        } catch (NegocioException ne) {
            FacesUtil.addErrorMessage(ne.getMessage());
        }
    }

    public void recalcularNotaFiscal() {
        if (this.notaFiscal != null) {
            this.notaFiscal.recalcularValorTotal();
        }
    }

    public void carregarItemPorCodigoSKU() {
        if (StringUtils.isNotEmpty(this.codigoSKU)) {
            this.itemLinhaEditavel = this.itens.porCodigoSKU(this.codigoSKU);
            this.carregarItemLinhaEditavel();
        }
    }

    public void carregarItemLinhaEditavel() {
        ItemNotaFiscal itemNotaFiscal = this.notaFiscal.getItensNotaFiscal()
                .get(0);

        if (this.itemLinhaEditavel != null) {
            if (this.existeItemNotaFiscalComItem(this.itemLinhaEditavel)) {
                FacesUtil
                        .addErrorMessage("Já existe um item na Nota Fiscal com o item informado.");
            } else {
                itemNotaFiscal.setItem(this.itemLinhaEditavel);
                itemNotaFiscal.setValorUnitario(this.itemLinhaEditavel
                        .getVrUnitario());

                // this.notaFiscal.adicionarItemVazio();
                this.itemLinhaEditavel = null;
                this.codigoSKU = null;

                this.notaFiscal.recalcularValorTotal();
            }
        }

    }

    private boolean existeItemNotaFiscalComItem(Item item) {
        boolean existeItemNotaFiscal = false;

        for (ItemNotaFiscal itemNotaFiscal : this.getNotaFiscal()
                .getItensNotaFiscal()) {
            if (item.equals(itemNotaFiscal.getItem())) {
                existeItemNotaFiscal = true;
                break;
            }
        }

        return existeItemNotaFiscal;
    }

    public List<Item> completarItem(String descricao) {
        return this.itens.porDescricao(descricao);
    }

    public List<Cliente> completarCliente(String nome) {
        return this.clientes.porNome(nome);
    }

    public NotaFiscal getNotaFiscal() {
        return notaFiscal;
    }

    public void setNotaFiscal(NotaFiscal notafiscal) {
        this.notaFiscal = notaFiscal;

    }

    public boolean isEditando() {
        return this.notaFiscal.getId() != null;
    }

    public Item getItemLinhaEditavel() {
        return itemLinhaEditavel;
    }

    public void setItemLinhaEditavel(Item itemLinhaEditavel) {
        this.itemLinhaEditavel = itemLinhaEditavel;
    }

    public String getCodigoSKU() {
        return codigoSKU;
    }

    public void setCodigoSKU(String codigoSKU) {
        this.codigoSKU = codigoSKU;
    }

    public Double getQuantidade() {
        return quantidade;
    }

    public void setQuantidade(Double quantidade) {
        this.quantidade = quantidade;
    }

    public BigDecimal getValorUnitario() {
        return valorUnitario;
    }

    public void setValorUnitario(BigDecimal valorUnitario) {
        this.valorUnitario = valorUnitario;
    }

    public Item getItem() {
        return item;
    }

    public void setItem(Item item) {
        this.item = item;
    }



}

xhtml displaying the table :

<?xml version="1.0" encoding="UTF-8" ?>
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:p="http://primefaces.org/ui">

    <p:commandButton value="Incluir Itens" type="button"
        onclick="PF('insereItem').show();" />


    <p:dataTable id="tabelaItens"
        value="#{cadastroNotaFiscalBean.notaFiscal.itensNotaFiscal}" 
        var="tabelaItens" style="margin-top: 20px"
        emptyMessage="Nenhum item encontrado." rows="20">
        <p:column headerText="Ordem">
            <h:outputText value="#{itemNotaFiscal.id}" />
        </p:column>
        <p:column headerText="Item">
            <h:outputText value="#{itemNotaFiscal.item.descricao}" />
        </p:column>
        <p:column headerText="Valor unitario">
            <h:outputText value="#{itemNotaFiscal.valorUnitario}">
                <f:convertNumber type="currency" />
            </h:outputText>
        </p:column>
        <p:column headerText="Quantidade">
            <h:outputText size="8" value="#{itemNotaFiscal.quantidade}" />
        </p:column>

    </p:dataTable>

    <p:dialog id="insereItem" header="Inclusão de Itens"
        widgetVar="insereItem" modal="true" height="300" width="500">

        <h:outputText value="Inclusão de Item" />
        <p:panelGrid columns="2" id="painel"
            style="width: 100%; margin-top: 20px" columnClasses="rotulo, campo">


            <p:outputLabel value="Item" for="item" />
            <p:autoComplete id="item" size="40" dropdown="true"
                value="#{cadastroNotaFiscalBean.item}"
                completeMethod="#{cadastroNotaFiscalBean.completarItem}" var="item"
                itemLabel="#{item.descricao}" itemValue="#{item}"
                forceSelection="true">
                <p:ajax event="itemSelect"
                    listener="#{cadastroNotaFiscalBean.handleSelect}"
                    update="valorUnitario" render="valorUnitario" />
                <p:ajax event="change"
                    listener="#{cadastroNotaFiscalBean.handleSelect}"
                    update="valorUnitario" render="valorUnitario" />


            </p:autoComplete>

            <p:outputLabel value="Valor Unitario" for="valorUnitario" />
            <p:outputLabel autoUpdate="true" id="valorUnitario" size="15"
                value="#{cadastroNotaFiscalBean.valorUnitario}" />


            <p:outputLabel value="Quantidade" for="quantidade" />
            <p:inputText id="quantidade" size="8"
                value="#{cadastroNotaFiscalBean.quantidade}" />

        </p:panelGrid>

        <p:commandButton update="tabelaItens"
            oncomplete="PF('insereItem').hide();"
            actionListener="#{cadastroNotaFiscalBean.insereItenNotaFiscal}"
            value="Inserir Item">

        </p:commandButton>
    </p:dialog>



</ui:composition>

I put the screenshots of the dialog screen and the table, if you observe it shows the line but empty. And the list is loaded correctly with the items, I tested the content with a for and this ok.

If you can shed some light, I’d appreciate it.

Answer 1

Friend is because you are making the wrong call, the correct one would be by the variable var="tableItens".

var="tabelaItens", ficando assim:

<p:column headerText="Ordem">
    <h:outputText value="#{tabelaItens.id}" /> -> CORRETO
    <h:outputText value="#{itemNotaFiscal.id}" /> -> ERRADO
</p:column>

Answer 2

On your datatable, where you have itemNotaFiscal.algumaCoisa replace with: tabelaItens.algumaCoisa, where the .algumaCoisa will be the attribute you want to reference.

You should use the var that is defined in the datatable statement when you want to reference the current datatable item.